discontinued / server · Files

number-state.html 138 KB
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 1176 1177 1178 1179 1180 1181 1182 1183 1184 1185 1186 1187 1188 1189 1190 1191 1192 1193 1194 1195 1196 1197 1198 1199 1200 1201 1202 1203 1204 1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 1261 1262 1263 1264 1265 1266 1267 1268 1269 1270 1271 1272 1273 1274 1275 1276 1277 1278 1279 1280 1281 1282 1283 1284 1285 1286 1287 1288 1289 1290 1291 1292 1293 1294 1295 1296 1297 1298 1299 1300 1301 1302 1303 1304 1305 1306 1307 1308 1309 1310 1311 1312 1313 1314 1315 1316 1317 1318 1319 1320 1321 1322 1323 1324 1325 1326 1327 1328 1329 1330 1331 1332 1333 1334 1335 1336 1337 1338 1339 1340 1341 1342 1343 1344 1345 1346 1347 1348 1349 1350 1351 1352 1353 1354 1355 1356 1357 1358 1359 1360 1361 1362 1363 1364 1365 1366 1367 1368 1369 1370 1371 1372 1373 1374 1375 1376 1377 1378 1379 1380 1381 1382 1383 1384 1385 1386 1387 1388 1389 1390 1391 1392 1393 1394 1395 1396 1397 1398 1399 1400 1401 1402 1403 1404 1405 1406 1407 1408 1409 1410 1411 1412 1413 1414 1415 1416 1417 1418 1419 1420 1421 1422 1423 1424 1425 1426 1427 1428 1429 1430 1431 1432 1433 1434 1435 1436 1437 1438 1439 1440 1441 1442 1443 1444 1445 1446 1447 1448 1449 1450 1451 1452 1453 1454 1455 1456 1457 1458 1459 1460 1461 1462 1463 1464 1465 1466 1467 1468 1469 1470 1471 1472 1473 1474 1475 1476 1477 1478 1479 1480 1481 1482 1483 1484 1485 1486 1487 1488 1489 1490 1491 1492 1493 1494 1495 1496 1497 1498 1499 1500 1501 1502 1503 1504 1505 1506 1507 1508 1509 1510 1511 1512 1513 1514 1515 1516 1517 1518 1519 1520 1521 1522 1523 1524 1525 1526 1527 1528 1529 1530 1531 1532 1533 1534 1535 1536 1537 1538 1539 1540 1541 1542 1543 1544 1545 1546 1547 1548 1549 1550 1551 1552 1553 1554 1555 1556 1557 1558 1559 1560 1561 1562 1563 1564 1565 1566 1567 1568 1569 1570 1571 1572 1573 1574 
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html lang="en-US-x-Hixie" ><head><title>4.10.7.1.13 Number state &#8212; HTML5 </title><style type="text/css">
   pre { margin-left: 2em; white-space: pre-wrap; }
   h2 { margin: 3em 0 1em 0; }
   h3 { margin: 2.5em 0 1em 0; }
   h4 { margin: 2.5em 0 0.75em 0; }
   h5, h6 { margin: 2.5em 0 1em; }
   h1 + h2, h1 + h2 + h2 { margin: 0.75em 0 0.75em; }
   h2 + h3, h3 + h4, h4 + h5, h5 + h6 { margin-top: 0.5em; }
   p { margin: 1em 0; }
   hr:not(.top) { display: block; background: none; border: none; padding: 0; margin: 2em 0; height: auto; }
   dl, dd { margin-top: 0; margin-bottom: 0; }
   dt { margin-top: 0.75em; margin-bottom: 0.25em; clear: left; }
   dt + dt { margin-top: 0; }
   dd dt { margin-top: 0.25em; margin-bottom: 0; }
   dd p { margin-top: 0; }
   dd dl + p { margin-top: 1em; }
   dd table + p { margin-top: 1em; }
   p + * > li, dd li { margin: 1em 0; }
   dt, dfn { font-weight: bold; font-style: normal; }
   dt dfn { font-style: italic; }
   pre, code { font-size: inherit; font-family: monospace; font-variant: normal; }
   pre strong { color: black; font: inherit; font-weight: bold; background: yellow; }
   pre em { font-weight: bolder; font-style: normal; }
   @media screen { code { color: orangered; } code :link, code :visited { color: inherit; } }
   var sub { vertical-align: bottom; font-size: smaller; position: relative; top: 0.1em; }
   table { border-collapse: collapse; border-style: hidden hidden none hidden; }
   table thead, table tbody { border-bottom: solid; }
   table tbody th:first-child { border-left: solid; }
   table tbody th { text-align: left; }
   table td, table th { border-left: solid; border-right: solid; border-bottom: solid thin; vertical-align: top; padding: 0.2em; }
   blockquote { margin: 0 0 0 2em; border: 0; padding: 0; font-style: italic; }

   .bad, .bad *:not(.XXX) { color: gray; border-color: gray; background: transparent; }
   .matrix, .matrix td { border: none; text-align: right; }
   .matrix { margin-left: 2em; }
   .dice-example { border-collapse: collapse; border-style: hidden solid solid hidden; border-width: thin; margin-left: 3em; }
   .dice-example caption { width: 30em; font-size: smaller; font-style: italic; padding: 0.75em 0; text-align: left; }
   .dice-example td, .dice-example th { border: solid thin; width: 1.35em; height: 1.05em; text-align: center; padding: 0; }

   .toc dfn, h1 dfn, h2 dfn, h3 dfn, h4 dfn, h5 dfn, h6 dfn { font: inherit; }
   img.extra { float: right; }
   pre.idl { border: solid thin; background: #EEEEEE; color: black; padding: 0.5em 1em; }
   pre.idl :link, pre.idl :visited { color: inherit; background: transparent; }
   pre.css { border: solid thin; background: #FFFFEE; color: black; padding: 0.5em 1em; }
   pre.css:first-line { color: #AAAA50; }
   dl.domintro { color: green; margin: 2em 0 2em 2em; padding: 0.5em 1em; border: none; background: #DDFFDD; }
   hr + dl.domintro, div.impl + dl.domintro { margin-top: 2.5em; margin-bottom: 1.5em; }
   dl.domintro dt, dl.domintro dt * { color: black; text-decoration: none; }
   dl.domintro dd { margin: 0.5em 0 1em 2em; padding: 0; }
   dl.domintro dd p { margin: 0.5em 0; }
   dl.switch { padding-left: 2em; }
   dl.switch > dt { text-indent: -1.5em; }
   dl.switch > dt:before { content: '\21AA'; padding: 0 0.5em 0 0; display: inline-block; width: 1em; text-align: right; line-height: 0.5em; }
   dl.triple { padding: 0 0 0 1em; }
   dl.triple dt, dl.triple dd { margin: 0; display: inline }
   dl.triple dt:after { content: ':'; }
   dl.triple dd:after { content: '\A'; white-space: pre; }
   .diff-old { text-decoration: line-through; color: silver; background: transparent; }
   .diff-chg, .diff-new { text-decoration: underline; color: green; background: transparent; }
   a .diff-new { border-bottom: 1px blue solid; }

   h2 { page-break-before: always; }
   h1, h2, h3, h4, h5, h6 { page-break-after: avoid; }
   h1 + h2, hr + h2.no-toc { page-break-before: auto; }

   p  > span:not([title=""]):not([class="XXX"]):not([class="impl"]):not([class="note"]),
   li > span:not([title=""]):not([class="XXX"]):not([class="impl"]):not([class="note"]), { border-bottom: solid #9999CC; }

   div.head { margin: 0 0 1em; padding: 1em 0 0 0; }
   div.head p { margin: 0; }
   div.head h1 { margin: 0; }
   div.head .logo { float: right; margin: 0 1em; }
   div.head .logo img { border: none } /* remove border from top image */
   div.head dl { margin: 1em 0; }
   div.head p.copyright, div.head p.alt { font-size: x-small; font-style: oblique; margin: 0; }

   body > .toc > li { margin-top: 1em; margin-bottom: 1em; }
   body > .toc.brief > li { margin-top: 0.35em; margin-bottom: 0.35em; }
   body > .toc > li > * { margin-bottom: 0.5em; }
   body > .toc > li > * > li > * { margin-bottom: 0.25em; }
   .toc, .toc li { list-style: none; }

   .brief { margin-top: 1em; margin-bottom: 1em; line-height: 1.1; }
   .brief li { margin: 0; padding: 0; }
   .brief li p { margin: 0; padding: 0; }

   .category-list { margin-top: -0.75em; margin-bottom: 1em; line-height: 1.5; }
   .category-list::before { content: '\21D2\A0'; font-size: 1.2em; font-weight: 900; }
   .category-list li { display: inline; }
   .category-list li:not(:last-child)::after { content: ', '; }
   .category-list li > span, .category-list li > a { text-transform: lowercase; }
   .category-list li * { text-transform: none; } /* don't affect <code> nested in <a> */

   .XXX { color: #E50000; background: white; border: solid red; padding: 0.5em; margin: 1em 0; }
   .XXX > :first-child { margin-top: 0; }
   p .XXX { line-height: 3em; }
   .annotation { border: solid thin black; background: #0C479D; color: white; position: relative; margin: 8px 0 20px 0; }
   .annotation:before { position: absolute; left: 0; top: 0; width: 100%; height: 100%; margin: 6px -6px -6px 6px; background: #333333; z-index: -1; content: ''; }
   .annotation :link, .annotation :visited { color: inherit; }
   .annotation :link:hover, .annotation :visited:hover { background: transparent; }
   .annotation span { border: none ! important; }
   .note { color: green; background: transparent; font-family: sans-serif; }
   .warning { color: red; background: transparent; }
   .note, .warning { font-weight: bolder; font-style: italic; }
   p.note, div.note { padding: 0.5em 2em; }
   span.note { padding: 0 2em; }
   .note p:first-child, .warning p:first-child { margin-top: 0; }
   .note p:last-child, .warning p:last-child { margin-bottom: 0; }
   .warning:before { font-style: normal; }
   p.note:before { content: 'Note: '; }
   p.warning:before { content: '\26A0 Warning! '; }

   .bookkeeping:before { display: block; content: 'Bookkeeping details'; font-weight: bolder; font-style: italic; }
   .bookkeeping { font-size: 0.8em; margin: 2em 0; }
   .bookkeeping p { margin: 0.5em 2em; display: list-item; list-style: square; }
   .bookkeeping dt { margin: 0.5em 2em 0; }
   .bookkeeping dd { margin: 0 3em 0.5em; }

   h4 { position: relative; z-index: 3; }
   h4 + .element, h4 + div + .element { margin-top: -2.5em; padding-top: 2em; }
   .element {
     background: #EEEEFF;
     color: black;
     margin: 0 0 1em 0.15em;
     padding: 0 1em 0.25em 0.75em;
     border-left: solid #9999FF 0.25em;
     position: relative;
     z-index: 1;
   }
   .element:before {
     position: absolute;
     z-index: 2;
     top: 0;
     left: -1.15em;
     height: 2em;
     width: 0.9em;
     background: #EEEEFF;
     content: ' ';
     border-style: none none solid solid;
     border-color: #9999FF;
     border-width: 0.25em;
   }

   .example { display: block; color: #222222; background: #FCFCFC; border-left: double; margin-left: 2em; padding-left: 1em; }
   td > .example:only-child { margin: 0 0 0 0.1em; }

   ul.domTree, ul.domTree ul { padding: 0 0 0 1em; margin: 0; }
   ul.domTree li { padding: 0; margin: 0; list-style: none; position: relative; }
   ul.domTree li li { list-style: none; }
   ul.domTree li:first-child::before { position: absolute; top: 0; height: 0.6em; left: -0.75em; width: 0.5em; border-style: none none solid solid; content: ''; border-width: 0.1em; }
   ul.domTree li:not(:last-child)::after { position: absolute; top: 0; bottom: -0.6em; left: -0.75em; width: 0.5em; border-style: none none solid solid; content: ''; border-width: 0.1em; }
   ul.domTree span { font-style: italic; font-family: serif; }
   ul.domTree .t1 code { color: purple; font-weight: bold; }
   ul.domTree .t2 { font-style: normal; font-family: monospace; }
   ul.domTree .t2 .name { color: black; font-weight: bold; }
   ul.domTree .t2 .value { color: blue; font-weight: normal; }
   ul.domTree .t3 code, .domTree .t4 code, .domTree .t5 code { color: gray; }
   ul.domTree .t7 code, .domTree .t8 code { color: green; }
   ul.domTree .t10 code { color: teal; }

   body.dfnEnabled dfn { cursor: pointer; }
   .dfnPanel {
     display: inline;
     position: absolute;
     z-index: 10;
     height: auto;
     width: auto;
     padding: 0.5em 0.75em;
     font: small sans-serif, Droid Sans Fallback;
     background: #DDDDDD;
     color: black;
     border: outset 0.2em;
   }
   .dfnPanel * { margin: 0; padding: 0; font: inherit; text-indent: 0; }
   .dfnPanel :link, .dfnPanel :visited { color: black; }
   .dfnPanel p { font-weight: bolder; }
   .dfnPanel * + p { margin-top: 0.25em; }
   .dfnPanel li { list-style-position: inside; }

   #configUI { position: absolute; z-index: 20; top: 10em; right: 1em; width: 11em; font-size: small; }
   #configUI p { margin: 0.5em 0; padding: 0.3em; background: #EEEEEE; color: black; border: inset thin; }
   #configUI p label { display: block; }
   #configUI #updateUI, #configUI .loginUI { text-align: center; }
   #configUI input[type=button] { display: block; margin: auto; }

   fieldset { margin: 1em; padding: 0.5em 1em; }
   fieldset > legend + * { margin-top: 0; }
   fieldset > :last-child { margin-bottom: 0; }
   fieldset p { margin: 0.5em 0; }

   .stability {
     position: fixed;
     bottom: 0;
     left: 0; right: 0;
     margin: 0 auto 0 auto !important;
    z-index: 1000;
     width: 50%;
     background: maroon; color: yellow;
     -webkit-border-radius: 1em 1em 0 0;
     -moz-border-radius: 1em 1em 0 0;
     border-radius: 1em 1em 0 0;
     -moz-box-shadow: 0 0 1em #500;
     -webkit-box-shadow: 0 0 1em #500;
     box-shadow: 0 0 1em red;
     padding: 0.5em 1em;
     text-align: center;
   }
   .stability strong {
     display: block;
   }
   .stability input {
     appearance: none; margin: 0; border: 0; padding: 0.25em 0.5em; background: transparent; color: black;
     position: absolute; top: -0.5em; right: 0; font: 1.25em sans-serif; text-align: center;
   }
   .stability input:hover {
     color: white;
     text-shadow: 0 0 2px black;
   }
   .stability input:active {
     padding: 0.3em 0.45em 0.2em 0.55em;
   }
   .stability :link, .stability :visited,
   .stability :link:hover, .stability :visited:hover {
     background: transparent;
     color: white;
   }

  </style><link href="data:text/css,.impl%20%7B%20display:%20none;%20%7D%0Ahtml%20%7B%20border:%20solid%20yellow;%20%7D%20.domintro:before%20%7B%20display:%20none;%20%7D" id="author" rel="alternate stylesheet" title="Author documentation only"><link href="data:text/css,.impl%20%7B%20background:%20%23FFEEEE;%20%7D%20.domintro:before%20%7B%20background:%20%23FFEEEE;%20%7D" id="highlight" rel="alternate stylesheet" title="Highlight implementation
requirements"><link href="http://www.w3.org/StyleSheets/TR/W3C-WD" rel="stylesheet" type="text/css"><style type="text/css">

   .applies thead th > * { display: block; }
   .applies thead code { display: block; }
   .applies tbody th { whitespace: nowrap; }
   .applies td { text-align: center; }
   .applies .yes { background: yellow; }

   .matrix, .matrix td { border: hidden; text-align: right; }
   .matrix { margin-left: 2em; }

   .dice-example { border-collapse: collapse; border-style: hidden solid solid hidden; border-width: thin; margin-left: 3em; }
   .dice-example caption { width: 30em; font-size: smaller; font-style: italic; padding: 0.75em 0; text-align: left; }
   .dice-example td, .dice-example th { border: solid thin; width: 1.35em; height: 1.05em; text-align: center; padding: 0; }

   td.eg { border-width: thin; text-align: center; }

   #table-example-1 { border: solid thin; border-collapse: collapse; margin-left: 3em; }
   #table-example-1 * { font-family: "Essays1743", serif; line-height: 1.01em; }
   #table-example-1 caption { padding-bottom: 0.5em; }
   #table-example-1 thead, #table-example-1 tbody { border: none; }
   #table-example-1 th, #table-example-1 td { border: solid thin; }
   #table-example-1 th { font-weight: normal; }
   #table-example-1 td { border-style: none solid; vertical-align: top; }
   #table-example-1 th { padding: 0.5em; vertical-align: middle; text-align: center; }
   #table-example-1 tbody tr:first-child td { padding-top: 0.5em; }
   #table-example-1 tbody tr:last-child td { padding-bottom: 1.5em; }
   #table-example-1 tbody td:first-child { padding-left: 2.5em; padding-right: 0; width: 9em; }
   #table-example-1 tbody td:first-child::after { content: leader(". "); }
   #table-example-1 tbody td { padding-left: 2em; padding-right: 2em; }
   #table-example-1 tbody td:first-child + td { width: 10em; }
   #table-example-1 tbody td:first-child + td ~ td { width: 2.5em; }
   #table-example-1 tbody td:first-child + td + td + td ~ td { width: 1.25em; }

   .apple-table-examples { border: none; border-collapse: separate; border-spacing: 1.5em 0em; width: 40em; margin-left: 3em; }
   .apple-table-examples * { font-family: "Times", serif; }
   .apple-table-examples td, .apple-table-examples th { border: none; white-space: nowrap; padding-top: 0; padding-bottom: 0; }
   .apple-table-examples tbody th:first-child { border-left: none; width: 100%; }
   .apple-table-examples thead th:first-child ~ th { font-size: smaller; font-weight: bolder; border-bottom: solid 2px; text-align: center; }
   .apple-table-examples tbody th::after, .apple-table-examples tfoot th::after { content: leader(". ") }
   .apple-table-examples tbody th, .apple-table-examples tfoot th { font: inherit; text-align: left; }
   .apple-table-examples td { text-align: right; vertical-align: top; }
   .apple-table-examples.e1 tbody tr:last-child td { border-bottom: solid 1px; }
   .apple-table-examples.e1 tbody + tbody tr:last-child td { border-bottom: double 3px; }
   .apple-table-examples.e2 th[scope=row] { padding-left: 1em; }
   .apple-table-examples sup { line-height: 0; }

   .details-example img { vertical-align: top; }

   #base64-table {
     white-space: nowrap;
     font-size: 0.6em;
     column-width: 6em;
     column-count: 5;
     column-gap: 1em;
     -moz-column-width: 6em;
     -moz-column-count: 5;
     -moz-column-gap: 1em;
     -webkit-column-width: 6em;
     -webkit-column-count: 5;
     -webkit-column-gap: 1em;
   }
   #base64-table thead { display: none; }
   #base64-table * { border: none; }
   #base64-table tbody td:first-child:after { content: ':'; }
   #base64-table tbody td:last-child { text-align: right; }

   #named-character-references-table {
     white-space: nowrap;
     font-size: 0.6em;
     column-width: 30em;
     column-gap: 1em;
     -moz-column-width: 30em;
     -moz-column-gap: 1em;
     -webkit-column-width: 30em;
     -webkit-column-gap: 1em;
   }
   #named-character-references-table > table > tbody > tr > td:first-child + td,
   #named-character-references-table > table > tbody > tr > td:last-child { text-align: center; }
   #named-character-references-table > table > tbody > tr > td:last-child:hover > span { position: absolute; top: auto; left: auto; margin-left: 0.5em; line-height: 1.2; font-size: 5em; border: outset; padding: 0.25em 0.5em; background: white; width: 1.25em; height: auto; text-align: center; }
   #named-character-references-table > table > tbody > tr#entity-CounterClockwiseContourIntegral > td:first-child { font-size: 0.5em; }

   .glyph.control { color: red; }

   @font-face {
     font-family: 'Essays1743';
     src: url('http://www.whatwg.org/specs/web-apps/current-work/fonts/Essays1743.ttf');
   }
   @font-face {
     font-family: 'Essays1743';
     font-weight: bold;
     src: url('http://www.whatwg.org/specs/web-apps/current-work/fonts/Essays1743-Bold.ttf');
   }
   @font-face {
     font-family: 'Essays1743';
     font-style: italic;
     src: url('http://www.whatwg.org/specs/web-apps/current-work/fonts/Essays1743-Italic.ttf');
   }
   @font-face {
     font-family: 'Essays1743';
     font-style: italic;
     font-weight: bold;
     src: url('http://www.whatwg.org/specs/web-apps/current-work/fonts/Essays1743-BoldItalic.ttf');
   }

  </style><style type="text/css">
   .domintro:before { display: table; margin: -1em -0.5em -0.5em auto; width: auto; content: 'This box is non-normative. Implementation requirements are given below this box.'; color: black; font-style: italic; border: solid 2px; background: white; padding: 0 0.25em; }
  </style><script type="text/javascript">
   function getCookie(name) {
     var params = location.search.substr(1).split("&");
     for (var index = 0; index < params.length; index++) {
       if (params[index] == name)
         return "1";
       var data = params[index].split("=");
       if (data[0] == name)
         return unescape(data[1]);
     }
     var cookies = document.cookie.split("; ");
     for (var index = 0; index < cookies.length; index++) {
       var data = cookies[index].split("=");
       if (data[0] == name)
         return unescape(data[1]);
     }
     return null;
   }
  </script>
  <script src="link-fixup.js" type="text/javascript"></script>
  <link href="style.css" rel="stylesheet"><link href="states-of-the-type-attribute.html" title="4.10.7.1 States of the type attribute" rel="prev">
  <link href="spec.html#contents" title="Table of contents" rel="index">
  <link href="common-input-element-attributes.html" title="4.10.7.2 Common input element attributes" rel="next">
  </head><body><div class="head" id="head">
<div id="multipage-common">
  <p class="stability" id="wip"><strong>This is a work in
  progress!</strong> For the latest updates from the HTML WG, possibly
  including important bug fixes, please look at the <a href="http://dev.w3.org/html5/spec/Overview.html">editor's draft</a> instead.
  There may also be a more
  <a href="http://www.w3.org/TR/html5">up-to-date Working Draft</a>
   with changes based on resolution of Last Call issues.
  <input onclick="closeWarning(this.parentNode)" type="button" value="&#9587;&#8413;"></p>
  <script type="text/javascript">
   function closeWarning(element) {
     element.parentNode.removeChild(element);
     var date = new Date();
     date.setDate(date.getDate()+4);
     document.cookie = 'hide-obsolescence-warning=1; expires=' + date.toGMTString();
   }
   if (getCookie('hide-obsolescence-warning') == '1')
     setTimeout(function () { document.getElementById('wip').parentNode.removeChild(document.getElementById('wip')); }, 2000);
  </script></div>

   <p><a href="http://www.w3.org/"><img alt="W3C" height="48" src="http://www.w3.org/Icons/w3c_home" width="72"></a></p>

   <h1>HTML5</h1>
   </div><div>
   <a href="states-of-the-type-attribute.html" class="prev">4.10.7.1 States of the type attribute</a> &#8211;
   <a href="spec.html#contents">Table of contents</a> &#8211;
   <a href="common-input-element-attributes.html" class="next">4.10.7.2 Common input element attributes</a>
  <ol class="toc"><li><ol><li><ol><li><ol><li><ol><li><a href="number-state.html#number-state"><span class="secno">4.10.7.1.13 </span>Number state</a></li><li><a href="number-state.html#range-state"><span class="secno">4.10.7.1.14 </span>Range state</a></li><li><a href="number-state.html#color-state"><span class="secno">4.10.7.1.15 </span>Color state</a></li><li><a href="number-state.html#checkbox-state"><span class="secno">4.10.7.1.16 </span>Checkbox state</a></li><li><a href="number-state.html#radio-button-state"><span class="secno">4.10.7.1.17 </span>Radio Button state</a></li><li><a href="number-state.html#file-upload-state"><span class="secno">4.10.7.1.18 </span>File Upload state</a></li><li><a href="number-state.html#submit-button-state"><span class="secno">4.10.7.1.19 </span>Submit Button state</a></li><li><a href="number-state.html#image-button-state"><span class="secno">4.10.7.1.20 </span>Image Button state</a></li><li><a href="number-state.html#reset-button-state"><span class="secno">4.10.7.1.21 </span>Reset Button state</a></li><li><a href="number-state.html#button-state"><span class="secno">4.10.7.1.22 </span>Button state</a></li></ol></li></ol></li></ol></li></ol></li></ol></div>

  <h6 id="number-state"><span class="secno">4.10.7.1.13 </span><dfn title="attr-input-type-number">Number</dfn> state</h6><div class="impl">

  <p>When an <code><a href="the-input-element.html#the-input-element">input</a></code> element's <code title="attr-input-type"><a href="the-input-element.html#attr-input-type">type</a></code> attribute is in the <a href="#number-state" title="attr-input-type-number">Number</a> state, the rules in
  this section apply.</p>

  </div><p>The <code><a href="the-input-element.html#the-input-element">input</a></code> element <a href="rendering.html#represents">represents</a> a control
  for setting the element's <a href="association-of-controls-and-forms.html#concept-fe-value" title="concept-fe-value">value</a> to a string representing a
  number.</p><div class="impl">

  <p>If the element is <i title="concept-input-mutable"><a href="the-input-element.html#concept-input-mutable">mutable</a></i>,
  the user agent should allow the user to change the number
  represented by its <a href="association-of-controls-and-forms.html#concept-fe-value" title="concept-fe-value">value</a>, as
  obtained from applying the <a href="common-microsyntaxes.html#rules-for-parsing-floating-point-number-values">rules for parsing floating point
  number values</a> to it. User agents must not allow the user to
  set the <a href="association-of-controls-and-forms.html#concept-fe-value" title="concept-fe-value">value</a> to a non-empty
  string that is not a <a href="common-microsyntaxes.html#valid-floating-point-number">valid floating point number</a>. If
  the user agent provides a user interface for selecting a number,
  then the <a href="association-of-controls-and-forms.html#concept-fe-value" title="concept-fe-value">value</a> must be set to
  the <a href="common-microsyntaxes.html#best-representation-of-the-number-as-a-floating-point-number" title="best representation of the number as a floating
  point number">best representation of the number representing the
  user's selection as a floating point number</a>. User agents
  should allow the user to set the <a href="association-of-controls-and-forms.html#concept-fe-value" title="concept-fe-value">value</a> to the empty string.</p>

  </div><p>The <code title="attr-input-value"><a href="the-input-element.html#attr-input-value">value</a></code> attribute, if
  specified and not empty, must have a value that is a <a href="common-microsyntaxes.html#valid-floating-point-number">valid
  floating point number</a>.</p><div class="impl">

  <p><strong>The <a href="the-input-element.html#value-sanitization-algorithm">value sanitization algorithm</a> is as
  follows</strong>: If the <a href="association-of-controls-and-forms.html#concept-fe-value" title="concept-fe-value">value</a>
  of the element is not a <a href="common-microsyntaxes.html#valid-floating-point-number">valid floating point number</a>,
  then set it to the empty string instead.</p>

  </div><p>The <code title="attr-input-min"><a href="common-input-element-attributes.html#attr-input-min">min</a></code> attribute, if
  specified, must have a value that is a <a href="common-microsyntaxes.html#valid-floating-point-number">valid floating point
  number</a>. The <code title="attr-input-max"><a href="common-input-element-attributes.html#attr-input-max">max</a></code>
  attribute, if specified, must have a value that is a <a href="common-microsyntaxes.html#valid-floating-point-number">valid
  floating point number</a>.</p><p><span class="impl">The <a href="common-input-element-attributes.html#concept-input-step-scale" title="concept-input-step-scale">step scale factor</a> is
  1.</span> The <a href="common-input-element-attributes.html#concept-input-step-default" title="concept-input-step-default">default
  step</a> is 1 (allowing only integers, unless the <code title="attr-input-min"><a href="common-input-element-attributes.html#attr-input-min">min</a></code> attribute has a non-integer
  value).</p><div class="impl">

  <p>When the element is <a href="association-of-controls-and-forms.html#suffering-from-a-step-mismatch">suffering from a step mismatch</a>,
  the user agent may round the element's <a href="association-of-controls-and-forms.html#concept-fe-value" title="concept-fe-value">value</a> to the nearest number for
  which the element would not <a href="association-of-controls-and-forms.html#suffering-from-a-step-mismatch" title="suffering from a step
  mismatch">suffer from a step mismatch</a>. If there are two such
  numbers, user agents are encouraged to pick the one nearest positive
  infinity.</p>

  <p><strong>The <a href="the-input-element.html#concept-input-value-string-number" title="concept-input-value-string-number">algorithm to convert a
  string to a number</a>, given a string <var title="">input</var>,
  is as follows</strong>: If applying the <a href="common-microsyntaxes.html#rules-for-parsing-floating-point-number-values">rules for parsing
  floating point number values</a> to <var title="">input</var>
  results in an error, then return an error; otherwise, return the
  resulting number.</p>

  <p><strong>The <a href="the-input-element.html#concept-input-value-number-string" title="concept-input-value-number-string">algorithm to convert a
  number to a string</a>, given a number <var title="">input</var>,
  is as follows</strong>: Return a <a href="common-microsyntaxes.html#valid-floating-point-number">valid floating point
  number</a> that represents <var title="">input</var>.</p>

  </div><div class="bookkeeping">

   <p>The following common <code><a href="the-input-element.html#the-input-element">input</a></code> element content
   attributes, IDL attributes, and methods apply to the element:
   <code title="attr-input-autocomplete"><a href="common-input-element-attributes.html#attr-input-autocomplete">autocomplete</a></code>,
   <code title="attr-input-list"><a href="common-input-element-attributes.html#attr-input-list">list</a></code>,
   <code title="attr-input-max"><a href="common-input-element-attributes.html#attr-input-max">max</a></code>,
   <code title="attr-input-min"><a href="common-input-element-attributes.html#attr-input-min">min</a></code>,
   <code title="attr-input-readonly"><a href="common-input-element-attributes.html#attr-input-readonly">readonly</a></code>,
   <code title="attr-input-required"><a href="common-input-element-attributes.html#attr-input-required">required</a></code>, and
   <code title="attr-input-step"><a href="common-input-element-attributes.html#attr-input-step">step</a></code> content attributes;
   <code title="dom-input-list"><a href="common-input-element-attributes.html#dom-input-list">list</a></code>,
   <code title="dom-input-value"><a href="common-input-element-attributes.html#dom-input-value">value</a></code>,
   <code title="dom-input-valueAsNumber"><a href="common-input-element-attributes.html#dom-input-valueasnumber">valueAsNumber</a></code>, and
   <code title="dom-input-selectedOption"><a href="common-input-element-attributes.html#dom-input-selectedoption">selectedOption</a></code> IDL attributes;
   <code title="dom-input-stepDown"><a href="common-input-element-attributes.html#dom-input-stepdown">stepDown()</a></code> and
   <code title="dom-input-stepUp"><a href="common-input-element-attributes.html#dom-input-stepup">stepUp()</a></code> methods.</p>

   <p>The <code title="dom-input-value"><a href="common-input-element-attributes.html#dom-input-value">value</a></code> IDL attribute is
   in mode <a href="common-input-element-attributes.html#dom-input-value-value" title="dom-input-value-value">value</a>.</p>

   <p>The <code title="event-input-input"><a href="common-input-element-attributes.html#event-input-input">input</a></code> and <code title="event-input-change"><a href="common-input-element-attributes.html#event-input-change">change</a></code> events apply.</p>

   <p>The following content attributes must not be specified and do not
   apply to the element:
   <code class="no-backref" title="attr-input-accept"><a href="#attr-input-accept">accept</a></code>,
   <code class="no-backref" title="attr-input-alt"><a href="#attr-input-alt">alt</a></code>,
   <code class="no-backref" title="attr-input-checked"><a href="the-input-element.html#attr-input-checked">checked</a></code>,
   <code class="no-backref" title="attr-input-dirname"><a href="common-input-element-attributes.html#attr-input-dirname">dirname</a></code>,
   <code class="no-backref" title="attr-fs-formaction"><a href="association-of-controls-and-forms.html#attr-fs-formaction">formaction</a></code>,
   <code class="no-backref" title="attr-fs-formenctype"><a href="association-of-controls-and-forms.html#attr-fs-formenctype">formenctype</a></code>,
   <code class="no-backref" title="attr-fs-formmethod"><a href="association-of-controls-and-forms.html#attr-fs-formmethod">formmethod</a></code>,
   <code class="no-backref" title="attr-fs-formnovalidate"><a href="association-of-controls-and-forms.html#attr-fs-formnovalidate">formnovalidate</a></code>,
   <code class="no-backref" title="attr-fs-formtarget"><a href="association-of-controls-and-forms.html#attr-fs-formtarget">formtarget</a></code>,
   <code class="no-backref" title="attr-dim-height"><a href="the-map-element.html#attr-dim-height">height</a></code>,
   <code class="no-backref" title="attr-input-maxlength"><a href="common-input-element-attributes.html#attr-input-maxlength">maxlength</a></code>,
   <code class="no-backref" title="attr-input-multiple"><a href="common-input-element-attributes.html#attr-input-multiple">multiple</a></code>,
   <code class="no-backref" title="attr-input-pattern"><a href="common-input-element-attributes.html#attr-input-pattern">pattern</a></code>,
   <code class="no-backref" title="attr-input-placeholder"><a href="common-input-element-attributes.html#attr-input-placeholder">placeholder</a></code>,
   <code class="no-backref" title="attr-input-size"><a href="common-input-element-attributes.html#attr-input-size">size</a></code>,
   <code class="no-backref" title="attr-input-src"><a href="#attr-input-src">src</a></code>, and
   <code class="no-backref" title="attr-dim-width"><a href="the-map-element.html#attr-dim-width">width</a></code>.</p>

   <p>The following IDL attributes and methods do not apply to the
   element:
   <code class="no-backref" title="dom-input-checked"><a href="common-input-element-attributes.html#dom-input-checked">checked</a></code>,
   <code class="no-backref" title="dom-input-files"><a href="common-input-element-attributes.html#dom-input-files">files</a></code>,
   <code class="no-backref" title="dom-textarea/input-selectionStart"><a href="association-of-controls-and-forms.html#dom-textarea-input-selectionstart">selectionStart</a></code>,
   <code class="no-backref" title="dom-textarea/input-selectionEnd"><a href="association-of-controls-and-forms.html#dom-textarea-input-selectionend">selectionEnd</a></code>,
   <code class="no-backref" title="dom-textarea/input-selectionDirection"><a href="association-of-controls-and-forms.html#dom-textarea-input-selectiondirection">selectionDirection</a></code>, and
   <code class="no-backref" title="dom-input-valueAsDate"><a href="common-input-element-attributes.html#dom-input-valueasdate">valueAsDate</a></code> IDL attributes;
   <code class="no-backref" title="dom-textarea/input-select"><a href="association-of-controls-and-forms.html#dom-textarea-input-select">select()</a></code> and
   <code class="no-backref" title="dom-textarea/input-setSelectionRange"><a href="association-of-controls-and-forms.html#dom-textarea-input-setselectionrange">setSelectionRange()</a></code> methods.</p>

  </div><h6 id="range-state"><span class="secno">4.10.7.1.14 </span><dfn title="attr-input-type-range">Range</dfn> state</h6><div class="impl">

  <p>When an <code><a href="the-input-element.html#the-input-element">input</a></code> element's <code title="attr-input-type"><a href="the-input-element.html#attr-input-type">type</a></code> attribute is in the <a href="#range-state" title="attr-input-type-range">Range</a> state, the rules in this
  section apply.</p>

  </div><p>The <code><a href="the-input-element.html#the-input-element">input</a></code> element <a href="rendering.html#represents">represents</a> a control
  for setting the element's <a href="association-of-controls-and-forms.html#concept-fe-value" title="concept-fe-value">value</a> to a string representing a
  number, but with the caveat that the exact value is not important,
  letting UAs provide a simpler interface than they do for the <a href="#number-state" title="attr-input-type-number">Number</a> state.</p><div class="impl">

  <p class="note">In this state, the range and step constraints are
  enforced even during user input, and there is no way to set the
  value to the empty string.</p>

  <p>If the element is <i title="concept-input-mutable"><a href="the-input-element.html#concept-input-mutable">mutable</a></i>,
  the user agent should allow the user to change the number
  represented by its <a href="association-of-controls-and-forms.html#concept-fe-value" title="concept-fe-value">value</a>, as
  obtained from applying the <a href="common-microsyntaxes.html#rules-for-parsing-floating-point-number-values">rules for parsing floating point
  number values</a> to it. User agents must not allow the user to
  set the <a href="association-of-controls-and-forms.html#concept-fe-value" title="concept-fe-value">value</a> to a string that
  is not a <a href="common-microsyntaxes.html#valid-floating-point-number">valid floating point number</a>. If the user agent
  provides a user interface for selecting a number, then the <a href="association-of-controls-and-forms.html#concept-fe-value" title="concept-fe-value">value</a> must be set to a <a href="common-microsyntaxes.html#best-representation-of-the-number-as-a-floating-point-number" title="best representation of the number as a floating point
  number">best representation of the number representing the user's
  selection as a floating point number</a>. User agents must not
  allow the user to set the <a href="association-of-controls-and-forms.html#concept-fe-value" title="concept-fe-value">value</a> to the empty string.</p>

  </div><p>The <code title="attr-input-value"><a href="the-input-element.html#attr-input-value">value</a></code> attribute, if
  specified, must have a value that is a <a href="common-microsyntaxes.html#valid-floating-point-number">valid floating point
  number</a>.</p><div class="impl">

  <p><strong>The <a href="the-input-element.html#value-sanitization-algorithm">value sanitization algorithm</a> is as
  follows</strong>: If the <a href="association-of-controls-and-forms.html#concept-fe-value" title="concept-fe-value">value</a>
  of the element is not a <a href="common-microsyntaxes.html#valid-floating-point-number">valid floating point number</a>,
  then set it to a <a href="common-microsyntaxes.html#valid-floating-point-number">valid floating point number</a> that
  represents the <a href="#concept-input-value-default-range" title="concept-input-value-default-range">default value</a>.</p>

  </div><p>The <code title="attr-input-min"><a href="common-input-element-attributes.html#attr-input-min">min</a></code> attribute, if
  specified, must have a value that is a <a href="common-microsyntaxes.html#valid-floating-point-number">valid floating point
  number</a>. The <a href="common-input-element-attributes.html#concept-input-min-default" title="concept-input-min-default">default
  minimum</a> is 0. The <code title="attr-input-max"><a href="common-input-element-attributes.html#attr-input-max">max</a></code>
  attribute, if specified, must have a value that is a <a href="common-microsyntaxes.html#valid-floating-point-number">valid
  floating point number</a>. The <a href="common-input-element-attributes.html#concept-input-max-default" title="concept-input-max-default">default maximum</a> is 100.</p><p>The <dfn id="concept-input-value-default-range" title="concept-input-value-default-range">default
  value</dfn> is the <a href="common-input-element-attributes.html#concept-input-min" title="concept-input-min">minimum</a>
  plus half the difference between the <a href="common-input-element-attributes.html#concept-input-min" title="concept-input-min">minimum</a> and the <a href="common-input-element-attributes.html#concept-input-max" title="concept-input-max">maximum</a>, unless the <a href="common-input-element-attributes.html#concept-input-max" title="concept-input-max">maximum</a> is less than the <a href="common-input-element-attributes.html#concept-input-min" title="concept-input-min">minimum</a>, in which case the <a href="#concept-input-value-default-range" title="concept-input-value-default-range">default value</a> is
  the <a href="common-input-element-attributes.html#concept-input-min" title="concept-input-min">minimum</a>.</p><div class="impl">

  <p>When the element is <a href="association-of-controls-and-forms.html#suffering-from-an-underflow">suffering from an
  underflow</a>, the user agent must set the element's <a href="association-of-controls-and-forms.html#concept-fe-value" title="concept-fe-value">value</a> to a <a href="common-microsyntaxes.html#valid-floating-point-number">valid floating point
  number</a> that represents the <a href="common-input-element-attributes.html#concept-input-min" title="concept-input-min">minimum</a>.</p>

  <p>When the element is <a href="association-of-controls-and-forms.html#suffering-from-an-overflow">suffering from an overflow</a>,
  if the <a href="common-input-element-attributes.html#concept-input-max" title="concept-input-max">maximum</a> is not less
  than the <a href="common-input-element-attributes.html#concept-input-min" title="concept-input-min">minimum</a>, the user
  agent must set the element's <a href="association-of-controls-and-forms.html#concept-fe-value" title="concept-fe-value">value</a> to a <a href="common-microsyntaxes.html#valid-floating-point-number">valid floating point
  number</a> that represents the <a href="common-input-element-attributes.html#concept-input-max" title="concept-input-max">maximum</a>.</p>

  </div><p><span class="impl">The <a href="common-input-element-attributes.html#concept-input-step-scale" title="concept-input-step-scale">step scale factor</a> is
  1.</span> The <a href="common-input-element-attributes.html#concept-input-step-default" title="concept-input-step-default">default
  step</a> is 1 (allowing only integers, unless the <code title="attr-input-min"><a href="common-input-element-attributes.html#attr-input-min">min</a></code> attribute has a non-integer
  value).</p><div class="impl">

  <p>When the element is <a href="association-of-controls-and-forms.html#suffering-from-a-step-mismatch">suffering from a step mismatch</a>,
  the user agent must round the element's <a href="association-of-controls-and-forms.html#concept-fe-value" title="concept-fe-value">value</a> to the nearest number for
  which the element would not <a href="association-of-controls-and-forms.html#suffering-from-a-step-mismatch" title="suffering from a step
  mismatch">suffer from a step mismatch</a>, and which is greater
  than or equal to the <a href="common-input-element-attributes.html#concept-input-min" title="concept-input-min">minimum</a>,
  and, if the <a href="common-input-element-attributes.html#concept-input-max" title="concept-input-max">maximum</a> is not
  less than the <a href="common-input-element-attributes.html#concept-input-min" title="concept-input-min">minimum</a>, which
  is less than or equal to the <a href="common-input-element-attributes.html#concept-input-max" title="concept-input-max">maximum</a>. If two numbers match these
  constraints, then user agents must use the one nearest to positive
  infinity.</p>

  <p class="example">For example, the markup
  <code>&lt;input&#160;type="range"&#160;min=0&#160;max=100&#160;step=20&#160;value=50&gt;</code>
  results in a range control whose initial value is 60.</p>

  <p><strong>The <a href="the-input-element.html#concept-input-value-string-number" title="concept-input-value-string-number">algorithm to convert a
  string to a number</a>, given a string <var title="">input</var>,
  is as follows</strong>: If applying the <a href="common-microsyntaxes.html#rules-for-parsing-floating-point-number-values">rules for parsing
  floating point number values</a> to <var title="">input</var>
  results in an error, then return an error; otherwise, return the
  resulting number.</p>

  <p><strong>The <a href="the-input-element.html#concept-input-value-number-string" title="concept-input-value-number-string">algorithm to convert a
  number to a string</a>, given a number <var title="">input</var>,
  is as follows</strong>: Return a <a href="common-microsyntaxes.html#valid-floating-point-number">valid floating point
  number</a> that represents <var title="">input</var>.</p>

  </div><div class="bookkeeping">

   <p>The following common <code><a href="the-input-element.html#the-input-element">input</a></code> element content
   attributes, IDL attributes, and methods apply to the element:
   <code title="attr-input-autocomplete"><a href="common-input-element-attributes.html#attr-input-autocomplete">autocomplete</a></code>,
   <code title="attr-input-list"><a href="common-input-element-attributes.html#attr-input-list">list</a></code>,
   <code title="attr-input-max"><a href="common-input-element-attributes.html#attr-input-max">max</a></code>,
   <code title="attr-input-min"><a href="common-input-element-attributes.html#attr-input-min">min</a></code>, and
   <code title="attr-input-step"><a href="common-input-element-attributes.html#attr-input-step">step</a></code> content attributes;
   <code title="dom-input-list"><a href="common-input-element-attributes.html#dom-input-list">list</a></code>,
   <code title="dom-input-value"><a href="common-input-element-attributes.html#dom-input-value">value</a></code>,
   <code title="dom-input-valueAsNumber"><a href="common-input-element-attributes.html#dom-input-valueasnumber">valueAsNumber</a></code>, and
   <code title="dom-input-selectedOption"><a href="common-input-element-attributes.html#dom-input-selectedoption">selectedOption</a></code> IDL attributes;
   <code title="dom-input-stepDown"><a href="common-input-element-attributes.html#dom-input-stepdown">stepDown()</a></code> and
   <code title="dom-input-stepUp"><a href="common-input-element-attributes.html#dom-input-stepup">stepUp()</a></code> methods.</p>

   <p>The <code title="dom-input-value"><a href="common-input-element-attributes.html#dom-input-value">value</a></code> IDL attribute is
   in mode <a href="common-input-element-attributes.html#dom-input-value-value" title="dom-input-value-value">value</a>.</p>

   <p>The <code title="event-input-input"><a href="common-input-element-attributes.html#event-input-input">input</a></code> and <code title="event-input-change"><a href="common-input-element-attributes.html#event-input-change">change</a></code> events apply.</p>

   <p>The following content attributes must not be specified and do not
   apply to the element:
   <code class="no-backref" title="attr-input-accept"><a href="#attr-input-accept">accept</a></code>,
   <code class="no-backref" title="attr-input-alt"><a href="#attr-input-alt">alt</a></code>,
   <code class="no-backref" title="attr-input-checked"><a href="the-input-element.html#attr-input-checked">checked</a></code>,
   <code class="no-backref" title="attr-input-dirname"><a href="common-input-element-attributes.html#attr-input-dirname">dirname</a></code>,
   <code class="no-backref" title="attr-fs-formaction"><a href="association-of-controls-and-forms.html#attr-fs-formaction">formaction</a></code>,
   <code class="no-backref" title="attr-fs-formenctype"><a href="association-of-controls-and-forms.html#attr-fs-formenctype">formenctype</a></code>,
   <code class="no-backref" title="attr-fs-formmethod"><a href="association-of-controls-and-forms.html#attr-fs-formmethod">formmethod</a></code>,
   <code class="no-backref" title="attr-fs-formnovalidate"><a href="association-of-controls-and-forms.html#attr-fs-formnovalidate">formnovalidate</a></code>,
   <code class="no-backref" title="attr-fs-formtarget"><a href="association-of-controls-and-forms.html#attr-fs-formtarget">formtarget</a></code>,
   <code class="no-backref" title="attr-dim-height"><a href="the-map-element.html#attr-dim-height">height</a></code>,
   <code class="no-backref" title="attr-input-maxlength"><a href="common-input-element-attributes.html#attr-input-maxlength">maxlength</a></code>,
   <code class="no-backref" title="attr-input-multiple"><a href="common-input-element-attributes.html#attr-input-multiple">multiple</a></code>,
   <code class="no-backref" title="attr-input-pattern"><a href="common-input-element-attributes.html#attr-input-pattern">pattern</a></code>,
   <code class="no-backref" title="attr-input-placeholder"><a href="common-input-element-attributes.html#attr-input-placeholder">placeholder</a></code>,
   <code class="no-backref" title="attr-input-readonly"><a href="common-input-element-attributes.html#attr-input-readonly">readonly</a></code>,
   <code class="no-backref" title="attr-input-required"><a href="common-input-element-attributes.html#attr-input-required">required</a></code>,
   <code class="no-backref" title="attr-input-size"><a href="common-input-element-attributes.html#attr-input-size">size</a></code>,
   <code class="no-backref" title="attr-input-src"><a href="#attr-input-src">src</a></code>, and
   <code class="no-backref" title="attr-dim-width"><a href="the-map-element.html#attr-dim-width">width</a></code>.</p>

   <p>The following IDL attributes and methods do not apply to the
   element:
   <code class="no-backref" title="dom-input-checked"><a href="common-input-element-attributes.html#dom-input-checked">checked</a></code>,
   <code class="no-backref" title="dom-input-files"><a href="common-input-element-attributes.html#dom-input-files">files</a></code>,
   <code class="no-backref" title="dom-textarea/input-selectionStart"><a href="association-of-controls-and-forms.html#dom-textarea-input-selectionstart">selectionStart</a></code>,
   <code class="no-backref" title="dom-textarea/input-selectionEnd"><a href="association-of-controls-and-forms.html#dom-textarea-input-selectionend">selectionEnd</a></code>,
   <code class="no-backref" title="dom-textarea/input-selectionDirection"><a href="association-of-controls-and-forms.html#dom-textarea-input-selectiondirection">selectionDirection</a></code>, and
   <code class="no-backref" title="dom-input-valueAsDate"><a href="common-input-element-attributes.html#dom-input-valueasdate">valueAsDate</a></code> IDL attributes;
   <code class="no-backref" title="dom-textarea/input-select"><a href="association-of-controls-and-forms.html#dom-textarea-input-select">select()</a></code> and
   <code class="no-backref" title="dom-textarea/input-setSelectionRange"><a href="association-of-controls-and-forms.html#dom-textarea-input-setselectionrange">setSelectionRange()</a></code> methods.</p>

  </div><div class="example">

   <p>Here is an example of a range control using an autocomplete list
   with the <code title="attr-input-list"><a href="common-input-element-attributes.html#attr-input-list">list</a></code> attribute. This
   could be useful if there are values along the full range of the
   control that are especially important, such as preconfigured light
   levels or typical speed limits in a range control used as a speed
   control. The following markup fragment:</p>

   <pre>&lt;input type="range" min="-100" max="100" value="0" step="10" name="power" list="powers"&gt;
&lt;datalist id="powers"&gt;
 &lt;option value="0"&gt;
 &lt;option value="-30"&gt;
 &lt;option value="30"&gt;
 &lt;option value="+50"&gt;
&lt;/datalist&gt;
</pre>

   <p>...with the following style sheet applied:</p>

   <pre>input { height: 75px; width: 49px; background: #D5CCBB; color: black; }</pre>

   <p>...might render as:</p>

   <p><img alt="A vertical slider control whose primary color is black and whose background color is beige, with the slider having five tick marks, one long one at each extremity, and three short ones clustered around the midpoint." height="75" src="sample-range.png" width="49"></p><p>Note how the UA determined the orientation of the control from
   the ratio of the style-sheet-specified height and width properties.
   The colors were similiarly derived from the style sheet. The tick
   marks, however, were derived from the markup. In particular, the
   <code title="attr-input-step"><a href="common-input-element-attributes.html#attr-input-step">step</a></code> attribute has not
   affected the placement of tick marks, the UA deciding to only use
   the author-specified completion values and then adding longer tick
   marks at the extremes.</p>

   <p>Note also how the invalid value <code title="">+50</code> was
   completely ignored.</p>

  </div><div class="example">

   <p>For another example, consider the following markup fragment:</p>

   <pre>&lt;input name=x type=range min=100 max=700 step=9.09090909 value=509.090909&gt;</pre>

   <p>A user agent could display in a variety of ways, for instance:</p>

   <p><img alt="As a dial." height="57" src="sample-range-2a.png" width="231"></p>

   <p>Or, alternatively, for instance:</p>

   <p><img alt="As a long horizontal slider with tick marks." height="56" src="sample-range-2b.png" width="445"></p>

   <p>The user agent could pick which one to display based on the
   dimensions given in the style sheet. This would allow it to
   maintain the same resolution for the tick marks, despite the
   differences in width.</p>

  </div><h6 id="color-state"><span class="secno">4.10.7.1.15 </span><dfn title="attr-input-type-color">Color</dfn> state</h6><div class="impl">

  <p>When an <code><a href="the-input-element.html#the-input-element">input</a></code> element's <code title="attr-input-type"><a href="the-input-element.html#attr-input-type">type</a></code> attribute is in the <a href="#color-state" title="attr-input-type-color">Color</a> state, the rules in this
  section apply.</p>

  </div><p>The <code><a href="the-input-element.html#the-input-element">input</a></code> element <a href="rendering.html#represents">represents</a> a color
  well control, for setting the element's <a href="association-of-controls-and-forms.html#concept-fe-value" title="concept-fe-value">value</a> to a string representing a
  <a href="common-microsyntaxes.html#simple-color">simple color</a>.</p><div class="impl">

  <p class="note">In this state, there is always a color picked, and
  there is no way to set the value to the empty string.</p>

  <p>If the element is <i title="concept-input-mutable"><a href="the-input-element.html#concept-input-mutable">mutable</a></i>,
  the user agent should allow the user to change the color represented
  by its <a href="association-of-controls-and-forms.html#concept-fe-value" title="concept-fe-value">value</a>, as obtained from
  applying the <a href="common-microsyntaxes.html#rules-for-parsing-simple-color-values">rules for parsing simple color values</a> to
  it. User agents must not allow the user to set the <a href="association-of-controls-and-forms.html#concept-fe-value" title="concept-fe-value">value</a> to a string that is not a
  <a href="common-microsyntaxes.html#valid-lowercase-simple-color">valid lowercase simple color</a>. If the user agent
  provides a user interface for selecting a color, then the <a href="association-of-controls-and-forms.html#concept-fe-value" title="concept-fe-value">value</a> must be set to the result of
  using the <a href="common-microsyntaxes.html#rules-for-serializing-simple-color-values">rules for serializing simple color values</a> to
  the user's selection. User agents must not allow the user to set the
  <a href="association-of-controls-and-forms.html#concept-fe-value" title="concept-fe-value">value</a> to the empty string.</p>

  </div><p>The <code title="attr-input-value"><a href="the-input-element.html#attr-input-value">value</a></code> attribute, if
  specified and not empty, must have a value that is a <a href="common-microsyntaxes.html#valid-simple-color">valid
  simple color</a>.</p><div class="impl">

  <p><strong>The <a href="the-input-element.html#value-sanitization-algorithm">value sanitization algorithm</a> is as
  follows</strong>: If the <a href="association-of-controls-and-forms.html#concept-fe-value" title="concept-fe-value">value</a>
  of the element is a <a href="common-microsyntaxes.html#valid-simple-color">valid simple color</a>, then set it to
  the <a href="association-of-controls-and-forms.html#concept-fe-value" title="concept-fe-value">value</a> of the element
  <a href="infrastructure.html#converted-to-ascii-lowercase">converted to ASCII lowercase</a>; otherwise, set it to the string
  "<code title="">#000000</code>".</p>

  </div><div class="bookkeeping">

   <p>The following common <code><a href="the-input-element.html#the-input-element">input</a></code> element content
   attributes, IDL attributes, and methods apply to the element:
   <code title="attr-input-autocomplete"><a href="common-input-element-attributes.html#attr-input-autocomplete">autocomplete</a></code> and
   <code title="attr-input-list"><a href="common-input-element-attributes.html#attr-input-list">list</a></code> content attributes;
   <code title="dom-input-list"><a href="common-input-element-attributes.html#dom-input-list">list</a></code>,
   <code title="dom-input-value"><a href="common-input-element-attributes.html#dom-input-value">value</a></code>, and
   <code title="dom-input-selectedOption"><a href="common-input-element-attributes.html#dom-input-selectedoption">selectedOption</a></code> IDL attributes.</p>

   <p>The <code title="dom-input-value"><a href="common-input-element-attributes.html#dom-input-value">value</a></code> IDL attribute is
   in mode <a href="common-input-element-attributes.html#dom-input-value-value" title="dom-input-value-value">value</a>.</p>

   <p>The <code title="event-input-input"><a href="common-input-element-attributes.html#event-input-input">input</a></code> and <code title="event-input-change"><a href="common-input-element-attributes.html#event-input-change">change</a></code> events apply.</p>

   <p>The following content attributes must not be specified and do not
   apply to the element:
   <code class="no-backref" title="attr-input-accept"><a href="#attr-input-accept">accept</a></code>,
   <code class="no-backref" title="attr-input-alt"><a href="#attr-input-alt">alt</a></code>,
   <code class="no-backref" title="attr-input-checked"><a href="the-input-element.html#attr-input-checked">checked</a></code>,
   <code class="no-backref" title="attr-input-dirname"><a href="common-input-element-attributes.html#attr-input-dirname">dirname</a></code>,
   <code class="no-backref" title="attr-fs-formaction"><a href="association-of-controls-and-forms.html#attr-fs-formaction">formaction</a></code>,
   <code class="no-backref" title="attr-fs-formenctype"><a href="association-of-controls-and-forms.html#attr-fs-formenctype">formenctype</a></code>,
   <code class="no-backref" title="attr-fs-formmethod"><a href="association-of-controls-and-forms.html#attr-fs-formmethod">formmethod</a></code>,
   <code class="no-backref" title="attr-fs-formnovalidate"><a href="association-of-controls-and-forms.html#attr-fs-formnovalidate">formnovalidate</a></code>,
   <code class="no-backref" title="attr-fs-formtarget"><a href="association-of-controls-and-forms.html#attr-fs-formtarget">formtarget</a></code>,
   <code class="no-backref" title="attr-dim-height"><a href="the-map-element.html#attr-dim-height">height</a></code>,
   <code class="no-backref" title="attr-input-maxlength"><a href="common-input-element-attributes.html#attr-input-maxlength">maxlength</a></code>,
   <code class="no-backref" title="attr-input-max"><a href="common-input-element-attributes.html#attr-input-max">max</a></code>,
   <code class="no-backref" title="attr-input-min"><a href="common-input-element-attributes.html#attr-input-min">min</a></code>,
   <code class="no-backref" title="attr-input-multiple"><a href="common-input-element-attributes.html#attr-input-multiple">multiple</a></code>,
   <code class="no-backref" title="attr-input-pattern"><a href="common-input-element-attributes.html#attr-input-pattern">pattern</a></code>,
   <code class="no-backref" title="attr-input-placeholder"><a href="common-input-element-attributes.html#attr-input-placeholder">placeholder</a></code>,
   <code class="no-backref" title="attr-input-readonly"><a href="common-input-element-attributes.html#attr-input-readonly">readonly</a></code>,
   <code class="no-backref" title="attr-input-required"><a href="common-input-element-attributes.html#attr-input-required">required</a></code>,
   <code class="no-backref" title="attr-input-size"><a href="common-input-element-attributes.html#attr-input-size">size</a></code>,
   <code class="no-backref" title="attr-input-src"><a href="#attr-input-src">src</a></code>,
   <code class="no-backref" title="attr-input-step"><a href="common-input-element-attributes.html#attr-input-step">step</a></code>, and
   <code class="no-backref" title="attr-dim-width"><a href="the-map-element.html#attr-dim-width">width</a></code>.</p>

   <p>The following IDL attributes and methods do not apply to the
   element:
   <code class="no-backref" title="dom-input-checked"><a href="common-input-element-attributes.html#dom-input-checked">checked</a></code>,
   <code class="no-backref" title="dom-input-files"><a href="common-input-element-attributes.html#dom-input-files">files</a></code>,
   <code class="no-backref" title="dom-textarea/input-selectionStart"><a href="association-of-controls-and-forms.html#dom-textarea-input-selectionstart">selectionStart</a></code>,
   <code class="no-backref" title="dom-textarea/input-selectionEnd"><a href="association-of-controls-and-forms.html#dom-textarea-input-selectionend">selectionEnd</a></code>,
   <code class="no-backref" title="dom-textarea/input-selectionDirection"><a href="association-of-controls-and-forms.html#dom-textarea-input-selectiondirection">selectionDirection</a></code>,
   <code class="no-backref" title="dom-input-valueAsDate"><a href="common-input-element-attributes.html#dom-input-valueasdate">valueAsDate</a></code>, and
   <code class="no-backref" title="dom-input-valueAsNumber"><a href="common-input-element-attributes.html#dom-input-valueasnumber">valueAsNumber</a></code> IDL attributes;
   <code class="no-backref" title="dom-textarea/input-select"><a href="association-of-controls-and-forms.html#dom-textarea-input-select">select()</a></code>,
   <code class="no-backref" title="dom-textarea/input-setSelectionRange"><a href="association-of-controls-and-forms.html#dom-textarea-input-setselectionrange">setSelectionRange()</a></code>,
   <code class="no-backref" title="dom-input-stepDown"><a href="common-input-element-attributes.html#dom-input-stepdown">stepDown()</a></code>, and
   <code class="no-backref" title="dom-input-stepUp"><a href="common-input-element-attributes.html#dom-input-stepup">stepUp()</a></code> methods.</p>

  </div><h6 id="checkbox-state"><span class="secno">4.10.7.1.16 </span><dfn title="attr-input-type-checkbox">Checkbox</dfn> state</h6><div class="impl">

  <p>When an <code><a href="the-input-element.html#the-input-element">input</a></code> element's <code title="attr-input-type"><a href="the-input-element.html#attr-input-type">type</a></code> attribute is in the <a href="#checkbox-state" title="attr-input-type-checkbox">Checkbox</a> state, the rules in
  this section apply.</p>

  </div><p>The <code><a href="the-input-element.html#the-input-element">input</a></code> element <a href="rendering.html#represents">represents</a> a
  two-state control that represents the element's <a href="association-of-controls-and-forms.html#concept-fe-checked" title="concept-fe-checked">checkedness</a> state. If the
  element's <a href="association-of-controls-and-forms.html#concept-fe-checked" title="concept-fe-checked">checkedness</a> state
  is true, the control represents a positive selection, and if it is
  false, a negative selection. If the element's <code title="dom-input-indeterminate"><a href="the-input-element.html#dom-input-indeterminate">indeterminate</a></code> IDL attribute
  is set to true, then the control's selection should be obscured as
  if the control was in a third, indeterminate, state.</p><p class="note">The control is never a true tri-state control, even
  if the element's <code title="dom-input-indeterminate"><a href="the-input-element.html#dom-input-indeterminate">indeterminate</a></code> IDL attribute
  is set to true. The <code title="dom-input-indeterminate"><a href="the-input-element.html#dom-input-indeterminate">indeterminate</a></code> IDL attribute
  only gives the appearance of a third state.</p><div class="impl">

  <p>If the element is <i title="concept-input-mutable"><a href="the-input-element.html#concept-input-mutable">mutable</a></i>,
  then: The <a href="content-models.html#pre-click-activation-steps">pre-click activation steps</a> consist of setting
  the element's <a href="association-of-controls-and-forms.html#concept-fe-checked" title="concept-fe-checked">checkedness</a> to
  its opposite value (i.e. true if it is false, false if it is true),
  and of setting the element's <code title="dom-input-indeterminate"><a href="the-input-element.html#dom-input-indeterminate">indeterminate</a></code> IDL attribute
  to false. The <a href="content-models.html#canceled-activation-steps">canceled activation steps</a> consist of
  setting the <a href="association-of-controls-and-forms.html#concept-fe-checked" title="concept-fe-checked">checkedness</a> and
  the element's <code title="dom-input-indeterminate"><a href="the-input-element.html#dom-input-indeterminate">indeterminate</a></code> IDL attribute
  back to the values they had before the <a href="content-models.html#pre-click-activation-steps">pre-click activation
  steps</a> were run. The <a href="content-models.html#activation-behavior">activation behavior</a> is to
  <a href="webappapis.html#fire-a-simple-event">fire a simple event</a> that bubbles named <code title="event-change">change</code> at the element. </p>

  <p><strong>Constraint validation</strong>: If the element is <i title="concept-input-required"><a href="common-input-element-attributes.html#concept-input-required">required</a></i> and its <a href="association-of-controls-and-forms.html#concept-fe-checked" title="concept-fe-checked">checkedness</a> is false, then the
  element is <a href="association-of-controls-and-forms.html#suffering-from-being-missing">suffering from being missing</a>.</p>

  </div><dl class="domintro"><dt><var title="">input</var> . <code title="dom-input-indeterminate"><a href="the-input-element.html#dom-input-indeterminate">indeterminate</a></code> [ = <var title="">value</var> ]</dt>

   <dd>

    <p>When set, overrides the rendering of <a href="#checkbox-state" title="attr-input-type-checkbox">checkbox</a> controls so that
    the current value is not visible.</p>

   </dd>

  </dl><div class="bookkeeping">

   <p>The following common <code><a href="the-input-element.html#the-input-element">input</a></code> element content
   attributes and IDL attributes apply to the element:
   <code title="attr-input-checked"><a href="the-input-element.html#attr-input-checked">checked</a></code>, and
   <code title="attr-input-required"><a href="common-input-element-attributes.html#attr-input-required">required</a></code> content attributes;
   <code title="dom-input-checked"><a href="common-input-element-attributes.html#dom-input-checked">checked</a></code> and
   <code title="dom-input-value"><a href="common-input-element-attributes.html#dom-input-value">value</a></code> IDL attributes.</p>

   <p>The <code title="dom-input-value"><a href="common-input-element-attributes.html#dom-input-value">value</a></code> IDL attribute is
   in mode <a href="common-input-element-attributes.html#dom-input-value-default-on" title="dom-input-value-default-on">default/on</a>.</p>

   <p>The <code title="event-input-change"><a href="common-input-element-attributes.html#event-input-change">change</a></code> event applies.</p>

   <p>The following content attributes must not be specified and do not
   apply to the element:
   <code class="no-backref" title="attr-input-accept"><a href="#attr-input-accept">accept</a></code>,
   <code class="no-backref" title="attr-input-alt"><a href="#attr-input-alt">alt</a></code>,
   <code class="no-backref" title="attr-input-autocomplete"><a href="common-input-element-attributes.html#attr-input-autocomplete">autocomplete</a></code>,
   <code class="no-backref" title="attr-input-dirname"><a href="common-input-element-attributes.html#attr-input-dirname">dirname</a></code>,
   <code class="no-backref" title="attr-fs-formaction"><a href="association-of-controls-and-forms.html#attr-fs-formaction">formaction</a></code>,
   <code class="no-backref" title="attr-fs-formenctype"><a href="association-of-controls-and-forms.html#attr-fs-formenctype">formenctype</a></code>,
   <code class="no-backref" title="attr-fs-formmethod"><a href="association-of-controls-and-forms.html#attr-fs-formmethod">formmethod</a></code>,
   <code class="no-backref" title="attr-fs-formnovalidate"><a href="association-of-controls-and-forms.html#attr-fs-formnovalidate">formnovalidate</a></code>,
   <code class="no-backref" title="attr-fs-formtarget"><a href="association-of-controls-and-forms.html#attr-fs-formtarget">formtarget</a></code>,
   <code class="no-backref" title="attr-dim-height"><a href="the-map-element.html#attr-dim-height">height</a></code>,
   <code class="no-backref" title="attr-input-list"><a href="common-input-element-attributes.html#attr-input-list">list</a></code>,
   <code class="no-backref" title="attr-input-max"><a href="common-input-element-attributes.html#attr-input-max">max</a></code>,
   <code class="no-backref" title="attr-input-maxlength"><a href="common-input-element-attributes.html#attr-input-maxlength">maxlength</a></code>,
   <code class="no-backref" title="attr-input-min"><a href="common-input-element-attributes.html#attr-input-min">min</a></code>,
   <code class="no-backref" title="attr-input-multiple"><a href="common-input-element-attributes.html#attr-input-multiple">multiple</a></code>,
   <code class="no-backref" title="attr-input-pattern"><a href="common-input-element-attributes.html#attr-input-pattern">pattern</a></code>,
   <code class="no-backref" title="attr-input-placeholder"><a href="common-input-element-attributes.html#attr-input-placeholder">placeholder</a></code>,
   <code class="no-backref" title="attr-input-readonly"><a href="common-input-element-attributes.html#attr-input-readonly">readonly</a></code>,
   <code class="no-backref" title="attr-input-size"><a href="common-input-element-attributes.html#attr-input-size">size</a></code>,
   <code class="no-backref" title="attr-input-src"><a href="#attr-input-src">src</a></code>,
   <code class="no-backref" title="attr-input-step"><a href="common-input-element-attributes.html#attr-input-step">step</a></code>, and
   <code class="no-backref" title="attr-dim-width"><a href="the-map-element.html#attr-dim-width">width</a></code>.</p>

   <p>The following IDL attributes and methods do not apply to the
   element:
   <code class="no-backref" title="dom-input-files"><a href="common-input-element-attributes.html#dom-input-files">files</a></code>,
   <code class="no-backref" title="dom-input-list"><a href="common-input-element-attributes.html#dom-input-list">list</a></code>,
   <code class="no-backref" title="dom-input-selectedOption"><a href="common-input-element-attributes.html#dom-input-selectedoption">selectedOption</a></code>,
   <code class="no-backref" title="dom-textarea/input-selectionStart"><a href="association-of-controls-and-forms.html#dom-textarea-input-selectionstart">selectionStart</a></code>,
   <code class="no-backref" title="dom-textarea/input-selectionEnd"><a href="association-of-controls-and-forms.html#dom-textarea-input-selectionend">selectionEnd</a></code>,
   <code class="no-backref" title="dom-textarea/input-selectionDirection"><a href="association-of-controls-and-forms.html#dom-textarea-input-selectiondirection">selectionDirection</a></code>,
   <code class="no-backref" title="dom-input-valueAsDate"><a href="common-input-element-attributes.html#dom-input-valueasdate">valueAsDate</a></code>, and
   <code class="no-backref" title="dom-input-valueAsNumber"><a href="common-input-element-attributes.html#dom-input-valueasnumber">valueAsNumber</a></code> IDL attributes;
   <code class="no-backref" title="dom-textarea/input-select"><a href="association-of-controls-and-forms.html#dom-textarea-input-select">select()</a></code>,
   <code class="no-backref" title="dom-textarea/input-setSelectionRange"><a href="association-of-controls-and-forms.html#dom-textarea-input-setselectionrange">setSelectionRange()</a></code>,
   <code class="no-backref" title="dom-input-stepDown"><a href="common-input-element-attributes.html#dom-input-stepdown">stepDown()</a></code>, and
   <code class="no-backref" title="dom-input-stepUp"><a href="common-input-element-attributes.html#dom-input-stepup">stepUp()</a></code> methods.</p>

   <p>The <code class="no-backref" title="event-input-input"><a href="common-input-element-attributes.html#event-input-input">input</a></code> event does not apply.</p>

  </div><h6 id="radio-button-state"><span class="secno">4.10.7.1.17 </span><dfn title="attr-input-type-radio">Radio Button</dfn> state</h6><div class="impl">

  <p>When an <code><a href="the-input-element.html#the-input-element">input</a></code> element's <code title="attr-input-type"><a href="the-input-element.html#attr-input-type">type</a></code> attribute is in the <a href="#radio-button-state" title="attr-input-type-radio">Radio Button</a> state, the rules
  in this section apply.</p>

  </div><p>The <code><a href="the-input-element.html#the-input-element">input</a></code> element <a href="rendering.html#represents">represents</a> a control
  that, when used in conjunction with other <code><a href="the-input-element.html#the-input-element">input</a></code>
  elements, forms a <i><a href="#radio-button-group">radio button group</a></i> in which only one
  control can have its <a href="association-of-controls-and-forms.html#concept-fe-checked" title="concept-fe-checked">checkedness</a> state set to true. If
  the element's <a href="association-of-controls-and-forms.html#concept-fe-checked" title="concept-fe-checked">checkedness</a>
  state is true, the control represents the selected control in the
  group, and if it is false, it indicates a control in the group that
  is not selected.</p><p>The <dfn id="radio-button-group"><i>radio button group</i></dfn> that contains an
  <code><a href="the-input-element.html#the-input-element">input</a></code> element <var title="">a</var> also contains all
  the other <code><a href="the-input-element.html#the-input-element">input</a></code> elements <var title="">b</var> that
  fulfill all of the following conditions:</p><ul><li>The <code><a href="the-input-element.html#the-input-element">input</a></code> element <var title="">b</var>'s <code title="attr-input-type"><a href="the-input-element.html#attr-input-type">type</a></code> attribute is in the <a href="#radio-button-state" title="attr-input-type-radio">Radio Button</a> state.</li>

   <li>Either <var title="">a</var> and <var title="">b</var> have the
   same <a href="association-of-controls-and-forms.html#form-owner">form owner</a>, or they both have no <a href="association-of-controls-and-forms.html#form-owner">form
   owner</a>.</li>

   <li>They both have a <code title="attr-fe-name"><a href="association-of-controls-and-forms.html#attr-fe-name">name</a></code>
   attribute, their <code title="attr-fe-name"><a href="association-of-controls-and-forms.html#attr-fe-name">name</a></code> attributes
   are not empty, and the value of <var title="">a</var>'s <code title="attr-fe-name"><a href="association-of-controls-and-forms.html#attr-fe-name">name</a></code> attribute is a <a href="infrastructure.html#compatibility-caseless">compatibility
   caseless</a> match for the value of <var title="">b</var>'s
   <code title="attr-fe-name"><a href="association-of-controls-and-forms.html#attr-fe-name">name</a></code> attribute.</li>

  </ul><p>A document must not contain an <code><a href="the-input-element.html#the-input-element">input</a></code> element whose
  <i><a href="#radio-button-group">radio button group</a></i> contains only that element.</p><div class="impl">

  <p>When any of the following phenomena occur, if the element's <a href="association-of-controls-and-forms.html#concept-fe-checked" title="concept-fe-checked">checkedness</a> state is true after
  the occurrence, the <a href="association-of-controls-and-forms.html#concept-fe-checked" title="concept-fe-checked">checkedness</a> state of all the other
  elements in the same <i><a href="#radio-button-group">radio button group</a></i> must be set to
  false:</p>

  <ul><li>The element's <a href="association-of-controls-and-forms.html#concept-fe-checked" title="concept-fe-checked">checkedness</a> state is set to
   true (for whatever reason).</li>

   <li>The element's <code title="attr-fe-name"><a href="association-of-controls-and-forms.html#attr-fe-name">name</a></code> attribute
   is set, changed, or removed.</li>

   <li>The element's <a href="association-of-controls-and-forms.html#form-owner">form owner</a> changes.</li>

  </ul><p>If the element is <i title="concept-input-mutable"><a href="the-input-element.html#concept-input-mutable">mutable</a></i>,
  then: The <a href="content-models.html#pre-click-activation-steps">pre-click activation steps</a> consist of setting
  the element's <a href="association-of-controls-and-forms.html#concept-fe-checked" title="concept-fe-checked">checkedness</a> to
  true. The <a href="content-models.html#canceled-activation-steps">canceled activation steps</a> consist of setting
  the element's <a href="association-of-controls-and-forms.html#concept-fe-checked" title="concept-fe-checked">checkedness</a> to
  false. The <a href="content-models.html#activation-behavior">activation behavior</a> is to <a href="webappapis.html#fire-a-simple-event">fire a
  simple event</a> that bubbles named <code title="event-change">change</code> at the element. .</p>

  <p><strong>Constraint validation</strong>: If an element in the
  <i><a href="#radio-button-group">radio button group</a></i> is <i title="concept-input-required"><a href="common-input-element-attributes.html#concept-input-required">required</a></i>, and all of the
  <code><a href="the-input-element.html#the-input-element">input</a></code> elements in the <i><a href="#radio-button-group">radio button group</a></i> have a
  <a href="association-of-controls-and-forms.html#concept-fe-checked" title="concept-fe-checked">checkedness</a> that is false,
  then the element is <a href="association-of-controls-and-forms.html#suffering-from-being-missing">suffering from being missing</a>.</p>

  </div><p class="note">If none of the radio buttons in a <a href="#radio-button-group">radio button
  group</a> are checked when they are inserted into the document,
  then they will all be initially unchecked in the interface, until
  such time as one of them is checked (either by the user or by
  script).</p><div class="bookkeeping">

   <p>The following common <code><a href="the-input-element.html#the-input-element">input</a></code> element content
   attributes and IDL attributes apply to the element:
   <code title="attr-input-checked"><a href="the-input-element.html#attr-input-checked">checked</a></code> and
   <code title="attr-input-required"><a href="common-input-element-attributes.html#attr-input-required">required</a></code> content attributes;
   <code title="dom-input-checked"><a href="common-input-element-attributes.html#dom-input-checked">checked</a></code> and
   <code title="dom-input-value"><a href="common-input-element-attributes.html#dom-input-value">value</a></code> IDL attributes.</p>

   <p>The <code title="dom-input-value"><a href="common-input-element-attributes.html#dom-input-value">value</a></code> IDL attribute is
   in mode <a href="common-input-element-attributes.html#dom-input-value-default-on" title="dom-input-value-default-on">default/on</a>.</p>

   <p>The <code title="event-input-change"><a href="common-input-element-attributes.html#event-input-change">change</a></code> event applies.</p>

   <p>The following content attributes must not be specified and do not
   apply to the element:
   <code class="no-backref" title="attr-input-accept"><a href="#attr-input-accept">accept</a></code>,
   <code class="no-backref" title="attr-input-alt"><a href="#attr-input-alt">alt</a></code>,
   <code class="no-backref" title="attr-input-autocomplete"><a href="common-input-element-attributes.html#attr-input-autocomplete">autocomplete</a></code>,
   <code class="no-backref" title="attr-input-dirname"><a href="common-input-element-attributes.html#attr-input-dirname">dirname</a></code>,
   <code class="no-backref" title="attr-fs-formaction"><a href="association-of-controls-and-forms.html#attr-fs-formaction">formaction</a></code>,
   <code class="no-backref" title="attr-fs-formenctype"><a href="association-of-controls-and-forms.html#attr-fs-formenctype">formenctype</a></code>,
   <code class="no-backref" title="attr-fs-formmethod"><a href="association-of-controls-and-forms.html#attr-fs-formmethod">formmethod</a></code>,
   <code class="no-backref" title="attr-fs-formnovalidate"><a href="association-of-controls-and-forms.html#attr-fs-formnovalidate">formnovalidate</a></code>,
   <code class="no-backref" title="attr-fs-formtarget"><a href="association-of-controls-and-forms.html#attr-fs-formtarget">formtarget</a></code>,
   <code class="no-backref" title="attr-dim-height"><a href="the-map-element.html#attr-dim-height">height</a></code>,
   <code class="no-backref" title="attr-input-list"><a href="common-input-element-attributes.html#attr-input-list">list</a></code>,
   <code class="no-backref" title="attr-input-max"><a href="common-input-element-attributes.html#attr-input-max">max</a></code>,
   <code class="no-backref" title="attr-input-maxlength"><a href="common-input-element-attributes.html#attr-input-maxlength">maxlength</a></code>,
   <code class="no-backref" title="attr-input-min"><a href="common-input-element-attributes.html#attr-input-min">min</a></code>,
   <code class="no-backref" title="attr-input-multiple"><a href="common-input-element-attributes.html#attr-input-multiple">multiple</a></code>,
   <code class="no-backref" title="attr-input-pattern"><a href="common-input-element-attributes.html#attr-input-pattern">pattern</a></code>,
   <code class="no-backref" title="attr-input-placeholder"><a href="common-input-element-attributes.html#attr-input-placeholder">placeholder</a></code>,
   <code class="no-backref" title="attr-input-readonly"><a href="common-input-element-attributes.html#attr-input-readonly">readonly</a></code>,
   <code class="no-backref" title="attr-input-size"><a href="common-input-element-attributes.html#attr-input-size">size</a></code>,
   <code class="no-backref" title="attr-input-src"><a href="#attr-input-src">src</a></code>,
   <code class="no-backref" title="attr-input-step"><a href="common-input-element-attributes.html#attr-input-step">step</a></code>, and
   <code class="no-backref" title="attr-dim-width"><a href="the-map-element.html#attr-dim-width">width</a></code>.</p>

   <p>The following IDL attributes and methods do not apply to the
   element:
   <code class="no-backref" title="dom-input-files"><a href="common-input-element-attributes.html#dom-input-files">files</a></code>,
   <code class="no-backref" title="dom-input-list"><a href="common-input-element-attributes.html#dom-input-list">list</a></code>,
   <code class="no-backref" title="dom-input-selectedOption"><a href="common-input-element-attributes.html#dom-input-selectedoption">selectedOption</a></code>,
   <code class="no-backref" title="dom-textarea/input-selectionStart"><a href="association-of-controls-and-forms.html#dom-textarea-input-selectionstart">selectionStart</a></code>,
   <code class="no-backref" title="dom-textarea/input-selectionEnd"><a href="association-of-controls-and-forms.html#dom-textarea-input-selectionend">selectionEnd</a></code>,
   <code class="no-backref" title="dom-textarea/input-selectionDirection"><a href="association-of-controls-and-forms.html#dom-textarea-input-selectiondirection">selectionDirection</a></code>,
   <code class="no-backref" title="dom-input-valueAsDate"><a href="common-input-element-attributes.html#dom-input-valueasdate">valueAsDate</a></code>, and
   <code class="no-backref" title="dom-input-valueAsNumber"><a href="common-input-element-attributes.html#dom-input-valueasnumber">valueAsNumber</a></code> IDL attributes;
   <code class="no-backref" title="dom-textarea/input-select"><a href="association-of-controls-and-forms.html#dom-textarea-input-select">select()</a></code>,
   <code class="no-backref" title="dom-textarea/input-setSelectionRange"><a href="association-of-controls-and-forms.html#dom-textarea-input-setselectionrange">setSelectionRange()</a></code>,
   <code class="no-backref" title="dom-input-stepDown"><a href="common-input-element-attributes.html#dom-input-stepdown">stepDown()</a></code>, and
   <code class="no-backref" title="dom-input-stepUp"><a href="common-input-element-attributes.html#dom-input-stepup">stepUp()</a></code> methods.</p>

   <p>The <code class="no-backref" title="event-input-input"><a href="common-input-element-attributes.html#event-input-input">input</a></code> event does not apply.</p>

  </div><h6 id="file-upload-state"><span class="secno">4.10.7.1.18 </span><dfn title="attr-input-type-file">File Upload</dfn> state</h6><div class="impl">

  <p>When an <code><a href="the-input-element.html#the-input-element">input</a></code> element's <code title="attr-input-type"><a href="the-input-element.html#attr-input-type">type</a></code> attribute is in the <a href="#file-upload-state" title="attr-input-type-file">File Upload</a> state, the rules in this
  section apply.</p>

  </div><p>The <code><a href="the-input-element.html#the-input-element">input</a></code> element <a href="rendering.html#represents">represents</a> a list of
  <dfn id="concept-input-type-file-selected" title="concept-input-type-file-selected">selected files</dfn>,
  each file consisting of a file name, a file type, and a file body
  (the contents of the file).</p><div class="impl">

  <p>File names may contain partial paths, e.g. in the case that a
  user has selected an entire directory hierarchy. Path components
  should be separated from each other using U+005C REVERSE SOLIDUS
  character (\).</p>

  <p>If the element is <i title="concept-input-mutable"><a href="the-input-element.html#concept-input-mutable">mutable</a></i>,
  the user agent should allow the user to change the files on the
  list, e.g. adding or removing files. Files can be from the
  filesystem or created on the fly, e.g. a picture taken from a camera
  connected to the user's device.</p>

  <p><strong>Constraint validation</strong>: If the element is <i title="concept-input-required"><a href="common-input-element-attributes.html#concept-input-required">required</a></i> and the list of <a href="#concept-input-type-file-selected" title="concept-input-type-file-selected">selected files</a> is
  empty, then the element is <a href="association-of-controls-and-forms.html#suffering-from-being-missing">suffering from being
  missing</a>.</p>

  <p>Unless the <code title="attr-input-multiple"><a href="common-input-element-attributes.html#attr-input-multiple">multiple</a></code>
  attribute is set, there must be no more than one file in the list of
  <a href="#concept-input-type-file-selected" title="concept-input-type-file-selected">selected
  files</a>.</p>

  </div><hr><p>The <dfn id="attr-input-accept" title="attr-input-accept"><code>accept</code></dfn>
  attribute may be specified to provide user agents with a hint of
  what file types will be accepted.</p><p>If specified, the attribute must consist of a <a href="common-microsyntaxes.html#set-of-comma-separated-tokens">set of
  comma-separated tokens</a>, each of which must be an <a href="infrastructure.html#ascii-case-insensitive">ASCII
  case-insensitive</a> match for one of the following:</p><dl><dt>The string <code title="">audio/*</code></dt>

   <dd>Indicates that sound files are accepted.</dd>

   <dt>The string <code title="">video/*</code></dt>

   <dd>Indicates that video files are accepted.</dd>

   <dt>The string <code title="">image/*</code></dt>

   <dd>Indicates that image files are accepted.</dd>

   <dt>A <a href="infrastructure.html#valid-mime-type-with-no-parameters">valid MIME type with no parameters</a></dt>

   <dd>Indicates that files of the specified type are accepted.</dd>

  </dl><p>The tokens must not be <a href="infrastructure.html#ascii-case-insensitive">ASCII case-insensitive</a>
  matches for any of the other tokens (i.e. duplicates are not
  allowed). <span class="impl">To obtain the list of tokens from the
  attribute, the user agent must <a href="common-microsyntaxes.html#split-a-string-on-commas" title="split a string on
  commas">split the attribute value on commas</a>.</span></p><p>User agents may use the value of this attribute to display a more
  appropriate user interface than a generic file picker. For instance,
  given the value <code title="">image/*</code>, a user agent could
  offer the user the option of using a local camera or selecting a
  photograph from their photo collection; given the value <code title="">audio/*</code>, a user agent could offer the user the
  option of recording a clip using a headset microphone.</p><div class="impl">

  <p>User agents should prevent the user from selecting files that are
  not accepted by one (or more) of these tokens.</p>

  </div><div class="example" id="fakepath-srsly">

   <p>For historical reasons, the <code title="dom-input-value"><a href="common-input-element-attributes.html#dom-input-value">value</a></code> IDL attribute prefixes the
   filename with the string "<code title="">C:\fakepath\</code>". Some
   legacy user agents actually included the full path (which was a
   security vulnerability). As a result of this, obtaining the
   filename from the <code title="dom-input-value"><a href="common-input-element-attributes.html#dom-input-value">value</a></code> IDL
   attribute in a backwards-compatible way is non-trivial. The
   following function extracts the filename in a suitably compatible
   manner:</p>

   <pre>function extractFilename(path) {  var x;
  x = path.lastIndexOf('\\');
  if (x &gt;= 0) // Windows-based path
    return path.substr(x+1);
  x = path.lastIndexOf('/');
  if (x &gt;= 0) // Unix-based path
    return path.substr(x+1);
  return path; // just the filename
}</pre>

   <p>This can be used as follows:</p>

   <pre>&lt;p&gt;&lt;input type=file name=image onchange="updateFilename(this.value)"&gt;&lt;/p&gt;
&lt;p&gt;The name of the file you picked is: &lt;span id="filename"&gt;(none)&lt;/span&gt;&lt;/p&gt;
&lt;script&gt;
 function updateFilename(path) {
   var name = extractFilename(path);
   document.getElementById('filename').textContent = name;
 }
&lt;/script&gt;</pre>

   

  </div><hr><div class="bookkeeping">

   <p>The following common <code><a href="the-input-element.html#the-input-element">input</a></code> element content
   attributes apply to the element:

   </p><p>The following common <code><a href="the-input-element.html#the-input-element">input</a></code> element content
   attributes and IDL attributes apply to the element:
   <code title="attr-input-accept"><a href="#attr-input-accept">accept</a></code>,
   <code title="attr-input-multiple"><a href="common-input-element-attributes.html#attr-input-multiple">multiple</a></code>, and
   <code title="attr-input-required"><a href="common-input-element-attributes.html#attr-input-required">required</a></code>;
   <code title="dom-input-files"><a href="common-input-element-attributes.html#dom-input-files">files</a></code> and
   <code title="dom-input-value"><a href="common-input-element-attributes.html#dom-input-value">value</a></code> IDL attributes.</p>

   <p>The <code title="dom-input-value"><a href="common-input-element-attributes.html#dom-input-value">value</a></code> IDL attribute is
   in mode <a href="common-input-element-attributes.html#dom-input-value-filename" title="dom-input-value-filename">filename</a>.</p>

   <p>The <code title="event-input-change"><a href="common-input-element-attributes.html#event-input-change">change</a></code> event applies.</p>

   <p>The following content attributes must not be specified and do not
   apply to the element:
   <code class="no-backref" title="attr-input-alt"><a href="#attr-input-alt">alt</a></code>,
   <code class="no-backref" title="attr-input-autocomplete"><a href="common-input-element-attributes.html#attr-input-autocomplete">autocomplete</a></code>,
   <code class="no-backref" title="attr-input-checked"><a href="the-input-element.html#attr-input-checked">checked</a></code>,
   <code class="no-backref" title="attr-input-dirname"><a href="common-input-element-attributes.html#attr-input-dirname">dirname</a></code>,
   <code class="no-backref" title="attr-fs-formaction"><a href="association-of-controls-and-forms.html#attr-fs-formaction">formaction</a></code>,
   <code class="no-backref" title="attr-fs-formenctype"><a href="association-of-controls-and-forms.html#attr-fs-formenctype">formenctype</a></code>,
   <code class="no-backref" title="attr-fs-formmethod"><a href="association-of-controls-and-forms.html#attr-fs-formmethod">formmethod</a></code>,
   <code class="no-backref" title="attr-fs-formnovalidate"><a href="association-of-controls-and-forms.html#attr-fs-formnovalidate">formnovalidate</a></code>,
   <code class="no-backref" title="attr-fs-formtarget"><a href="association-of-controls-and-forms.html#attr-fs-formtarget">formtarget</a></code>,
   <code class="no-backref" title="attr-dim-height"><a href="the-map-element.html#attr-dim-height">height</a></code>,
   <code class="no-backref" title="attr-input-list"><a href="common-input-element-attributes.html#attr-input-list">list</a></code>,
   <code class="no-backref" title="attr-input-max"><a href="common-input-element-attributes.html#attr-input-max">max</a></code>,
   <code class="no-backref" title="attr-input-maxlength"><a href="common-input-element-attributes.html#attr-input-maxlength">maxlength</a></code>,
   <code class="no-backref" title="attr-input-min"><a href="common-input-element-attributes.html#attr-input-min">min</a></code>,
   <code class="no-backref" title="attr-input-pattern"><a href="common-input-element-attributes.html#attr-input-pattern">pattern</a></code>,
   <code class="no-backref" title="attr-input-placeholder"><a href="common-input-element-attributes.html#attr-input-placeholder">placeholder</a></code>,
   <code class="no-backref" title="attr-input-readonly"><a href="common-input-element-attributes.html#attr-input-readonly">readonly</a></code>,
   <code class="no-backref" title="attr-input-size"><a href="common-input-element-attributes.html#attr-input-size">size</a></code>,
   <code class="no-backref" title="attr-input-src"><a href="#attr-input-src">src</a></code>,
   <code class="no-backref" title="attr-input-step"><a href="common-input-element-attributes.html#attr-input-step">step</a></code>, and
   <code class="no-backref" title="attr-dim-width"><a href="the-map-element.html#attr-dim-width">width</a></code>.</p>

   <p>The element's <code title="attr-input-value"><a href="the-input-element.html#attr-input-value">value</a></code>
   attribute must be omitted.</p>

   <p>The following IDL attributes and methods do not apply to the
   element:
   <code class="no-backref" title="dom-input-checked"><a href="common-input-element-attributes.html#dom-input-checked">checked</a></code>,
   <code class="no-backref" title="dom-input-list"><a href="common-input-element-attributes.html#dom-input-list">list</a></code>,
   <code class="no-backref" title="dom-input-selectedOption"><a href="common-input-element-attributes.html#dom-input-selectedoption">selectedOption</a></code>,
   <code class="no-backref" title="dom-textarea/input-selectionStart"><a href="association-of-controls-and-forms.html#dom-textarea-input-selectionstart">selectionStart</a></code>,
   <code class="no-backref" title="dom-textarea/input-selectionEnd"><a href="association-of-controls-and-forms.html#dom-textarea-input-selectionend">selectionEnd</a></code>,
   <code class="no-backref" title="dom-textarea/input-selectionDirection"><a href="association-of-controls-and-forms.html#dom-textarea-input-selectiondirection">selectionDirection</a></code>,
   <code class="no-backref" title="dom-input-valueAsDate"><a href="common-input-element-attributes.html#dom-input-valueasdate">valueAsDate</a></code>, and
   <code class="no-backref" title="dom-input-valueAsNumber"><a href="common-input-element-attributes.html#dom-input-valueasnumber">valueAsNumber</a></code> IDL attributes;
   <code class="no-backref" title="dom-textarea/input-select"><a href="association-of-controls-and-forms.html#dom-textarea-input-select">select()</a></code>,
   <code class="no-backref" title="dom-textarea/input-setSelectionRange"><a href="association-of-controls-and-forms.html#dom-textarea-input-setselectionrange">setSelectionRange()</a></code>,
   <code class="no-backref" title="dom-input-stepDown"><a href="common-input-element-attributes.html#dom-input-stepdown">stepDown()</a></code>, and
   <code class="no-backref" title="dom-input-stepUp"><a href="common-input-element-attributes.html#dom-input-stepup">stepUp()</a></code> methods.</p>

   <p>The <code class="no-backref" title="event-input-input"><a href="common-input-element-attributes.html#event-input-input">input</a></code> event does not apply.</p>

  </div><h6 id="submit-button-state"><span class="secno">4.10.7.1.19 </span><dfn title="attr-input-type-submit">Submit Button</dfn> state</h6><div class="impl">

  <p>When an <code><a href="the-input-element.html#the-input-element">input</a></code> element's <code title="attr-input-type"><a href="the-input-element.html#attr-input-type">type</a></code> attribute is in the <a href="#submit-button-state" title="attr-input-type-submit">Submit Button</a> state, the rules
  in this section apply.</p>

  </div><p>The <code><a href="the-input-element.html#the-input-element">input</a></code> element <a href="rendering.html#represents">represents</a> a button
  that, when activated, submits the form. <span class="impl">If the
  element has a <code title="attr-input-value"><a href="the-input-element.html#attr-input-value">value</a></code> attribute,
  the button's label must be the value of that attribute; otherwise,
  it must be an implementation-defined string that means "Submit" or
  some such.</span> The element is a <a href="forms.html#concept-button" title="concept-button">button</a>, specifically a <a href="forms.html#concept-submit-button" title="concept-submit-button">submit button</a>.</p><div class="impl">

  <p>If the element is <i title="concept-input-mutable"><a href="the-input-element.html#concept-input-mutable">mutable</a></i>,
  the user agent should allow the user to activate the element.</p>

  <p>The element's <a href="content-models.html#activation-behavior">activation behavior</a>, if the element
  has a <a href="association-of-controls-and-forms.html#form-owner">form owner</a>, is to <a href="association-of-controls-and-forms.html#concept-form-submit" title="concept-form-submit">submit</a> the <a href="association-of-controls-and-forms.html#form-owner">form
  owner</a> from the <code><a href="the-input-element.html#the-input-element">input</a></code> element; otherwise, it is
  to do nothing.</p>

  </div><p>The <code title="attr-fs-formaction"><a href="association-of-controls-and-forms.html#attr-fs-formaction">formaction</a></code>, <code title="attr-fs-formenctype"><a href="association-of-controls-and-forms.html#attr-fs-formenctype">formenctype</a></code>, <code title="attr-fs-formmethod"><a href="association-of-controls-and-forms.html#attr-fs-formmethod">formmethod</a></code>, <code title="attr-fs-formnovalidate"><a href="association-of-controls-and-forms.html#attr-fs-formnovalidate">formnovalidate</a></code>, and <code title="attr-fs-formtarget"><a href="association-of-controls-and-forms.html#attr-fs-formtarget">formtarget</a></code> attributes are <a href="association-of-controls-and-forms.html#attributes-for-form-submission">attributes
  for form submission</a>.</p><p class="note">The <code title="attr-fs-formnovalidate"><a href="association-of-controls-and-forms.html#attr-fs-formnovalidate">formnovalidate</a></code> attribute can
  be used to make submit buttons that do not trigger the constraint
  validation.</p><div class="bookkeeping">

   <p>The following common <code><a href="the-input-element.html#the-input-element">input</a></code> element content
   attributes and IDL attributes apply to the element:
   <code title="attr-fs-formaction"><a href="association-of-controls-and-forms.html#attr-fs-formaction">formaction</a></code>,
   <code title="attr-fs-formenctype"><a href="association-of-controls-and-forms.html#attr-fs-formenctype">formenctype</a></code>,
   <code title="attr-fs-formmethod"><a href="association-of-controls-and-forms.html#attr-fs-formmethod">formmethod</a></code>,
   <code title="attr-fs-formnovalidate"><a href="association-of-controls-and-forms.html#attr-fs-formnovalidate">formnovalidate</a></code>, and
   <code title="attr-fs-formtarget"><a href="association-of-controls-and-forms.html#attr-fs-formtarget">formtarget</a></code> content attributes;
   <code title="dom-input-value"><a href="common-input-element-attributes.html#dom-input-value">value</a></code> IDL attribute.</p>

   <p>The <code title="dom-input-value"><a href="common-input-element-attributes.html#dom-input-value">value</a></code> IDL attribute is
   in mode <a href="common-input-element-attributes.html#dom-input-value-default" title="dom-input-value-default">default</a>.</p>

   <p>The following content attributes must not be specified and do not
   apply to the element:
   <code class="no-backref" title="attr-input-accept"><a href="#attr-input-accept">accept</a></code>,
   <code class="no-backref" title="attr-input-alt"><a href="#attr-input-alt">alt</a></code>,
   <code class="no-backref" title="attr-input-autocomplete"><a href="common-input-element-attributes.html#attr-input-autocomplete">autocomplete</a></code>,
   <code class="no-backref" title="attr-input-checked"><a href="the-input-element.html#attr-input-checked">checked</a></code>,
   <code class="no-backref" title="attr-input-dirname"><a href="common-input-element-attributes.html#attr-input-dirname">dirname</a></code>,
   <code class="no-backref" title="attr-dim-height"><a href="the-map-element.html#attr-dim-height">height</a></code>,
   <code class="no-backref" title="attr-input-list"><a href="common-input-element-attributes.html#attr-input-list">list</a></code>,
   <code class="no-backref" title="attr-input-max"><a href="common-input-element-attributes.html#attr-input-max">max</a></code>,
   <code class="no-backref" title="attr-input-maxlength"><a href="common-input-element-attributes.html#attr-input-maxlength">maxlength</a></code>,
   <code class="no-backref" title="attr-input-min"><a href="common-input-element-attributes.html#attr-input-min">min</a></code>,
   <code class="no-backref" title="attr-input-multiple"><a href="common-input-element-attributes.html#attr-input-multiple">multiple</a></code>,
   <code class="no-backref" title="attr-input-pattern"><a href="common-input-element-attributes.html#attr-input-pattern">pattern</a></code>,
   <code class="no-backref" title="attr-input-placeholder"><a href="common-input-element-attributes.html#attr-input-placeholder">placeholder</a></code>,
   <code class="no-backref" title="attr-input-readonly"><a href="common-input-element-attributes.html#attr-input-readonly">readonly</a></code>,
   <code class="no-backref" title="attr-input-required"><a href="common-input-element-attributes.html#attr-input-required">required</a></code>,
   <code class="no-backref" title="attr-input-size"><a href="common-input-element-attributes.html#attr-input-size">size</a></code>,
   <code class="no-backref" title="attr-input-src"><a href="#attr-input-src">src</a></code>,
   <code class="no-backref" title="attr-input-step"><a href="common-input-element-attributes.html#attr-input-step">step</a></code>, and
   <code class="no-backref" title="attr-dim-width"><a href="the-map-element.html#attr-dim-width">width</a></code>.</p>

   <p>The following IDL attributes and methods do not apply to the
   element:
   <code class="no-backref" title="dom-input-checked"><a href="common-input-element-attributes.html#dom-input-checked">checked</a></code>,
   <code class="no-backref" title="dom-input-files"><a href="common-input-element-attributes.html#dom-input-files">files</a></code>,
   <code class="no-backref" title="dom-input-list"><a href="common-input-element-attributes.html#dom-input-list">list</a></code>,
   <code class="no-backref" title="dom-input-selectedOption"><a href="common-input-element-attributes.html#dom-input-selectedoption">selectedOption</a></code>,
   <code class="no-backref" title="dom-textarea/input-selectionStart"><a href="association-of-controls-and-forms.html#dom-textarea-input-selectionstart">selectionStart</a></code>,
   <code class="no-backref" title="dom-textarea/input-selectionEnd"><a href="association-of-controls-and-forms.html#dom-textarea-input-selectionend">selectionEnd</a></code>,
   <code class="no-backref" title="dom-textarea/input-selectionDirection"><a href="association-of-controls-and-forms.html#dom-textarea-input-selectiondirection">selectionDirection</a></code>,
   <code class="no-backref" title="dom-input-valueAsDate"><a href="common-input-element-attributes.html#dom-input-valueasdate">valueAsDate</a></code>, and
   <code class="no-backref" title="dom-input-valueAsNumber"><a href="common-input-element-attributes.html#dom-input-valueasnumber">valueAsNumber</a></code> IDL attributes;
   <code class="no-backref" title="dom-textarea/input-select"><a href="association-of-controls-and-forms.html#dom-textarea-input-select">select()</a></code>,
   <code class="no-backref" title="dom-textarea/input-setSelectionRange"><a href="association-of-controls-and-forms.html#dom-textarea-input-setselectionrange">setSelectionRange()</a></code>,
   <code class="no-backref" title="dom-input-stepDown"><a href="common-input-element-attributes.html#dom-input-stepdown">stepDown()</a></code>, and
   <code class="no-backref" title="dom-input-stepUp"><a href="common-input-element-attributes.html#dom-input-stepup">stepUp()</a></code> methods.</p>

   <p>The <code class="no-backref" title="event-input-input"><a href="common-input-element-attributes.html#event-input-input">input</a></code> and <code class="no-backref" title="event-input-change"><a href="common-input-element-attributes.html#event-input-change">change</a></code> events do not apply.</p>

  </div><h6 id="image-button-state"><span class="secno">4.10.7.1.20 </span><dfn title="attr-input-type-image">Image Button</dfn> state</h6><div class="impl">

  <p>When an <code><a href="the-input-element.html#the-input-element">input</a></code> element's <code title="attr-input-type"><a href="the-input-element.html#attr-input-type">type</a></code> attribute is in the <a href="#image-button-state" title="attr-input-type-image">Image Button</a> state, the rules
  in this section apply.</p>

  </div><p>The <code><a href="the-input-element.html#the-input-element">input</a></code> element <a href="rendering.html#represents">represents</a> either an
  image from which a user can select a coordinate and submit the form,
  or alternatively a button from which the user can submit the
  form. The element is a <a href="forms.html#concept-button" title="concept-button">button</a>,
  specifically a <a href="forms.html#concept-submit-button" title="concept-submit-button">submit
  button</a>.</p><hr><p>The image is given by the <dfn id="attr-input-src" title="attr-input-src"><code>src</code></dfn> attribute. The <code title="attr-input-src"><a href="#attr-input-src">src</a></code> attribute must be present, and
  must contain a <a href="urls.html#valid-non-empty-url-potentially-surrounded-by-spaces">valid non-empty URL potentially surrounded by
  spaces</a> referencing a non-interactive, optionally animated,
  image resource that is neither paged nor scripted.</p><div class="impl">

  <p>When any of the following events occur, unless the user agent
  cannot support images, or its support for images has been disabled,
  or the user agent only fetches elements on demand, or the <code title="attr-input-src"><a href="#attr-input-src">src</a></code> attribute's value is the empty
  string, the user agent must <a href="urls.html#resolve-a-url" title="resolve a
  url">resolve</a> the value of the <code title="attr-input-src"><a href="#attr-input-src">src</a></code> attribute, relative to the
  element, and if that is successful, must <a href="fetching-resources.html#fetch">fetch</a> the
  resulting <a href="urls.html#absolute-url">absolute URL</a>:</p>  
  <ul><li>The <code><a href="the-input-element.html#the-input-element">input</a></code> element's <code title="attr-input-type"><a href="the-input-element.html#attr-input-type">type</a></code> attribute is first set to the
   <a href="#image-button-state" title="attr-input-type-image">Image Button</a> state
   (possibly when the element is first created), and the <code title="attr-input-src"><a href="#attr-input-src">src</a></code> attribute is present.</li>

   <li>The <code><a href="the-input-element.html#the-input-element">input</a></code> element's <code title="attr-input-type"><a href="the-input-element.html#attr-input-type">type</a></code> attribute is changed back to
   the <a href="#image-button-state" title="attr-input-type-image">Image Button</a> state,
   and the <code title="attr-input-src"><a href="#attr-input-src">src</a></code> attribute is
   present, and its value has changed since the last time the <code title="attr-input-type"><a href="the-input-element.html#attr-input-type">type</a></code> attribute was in the <a href="#image-button-state" title="attr-input-type-image">Image Button</a> state.</li>

   <li>The <code><a href="the-input-element.html#the-input-element">input</a></code> element's <code title="attr-input-type"><a href="the-input-element.html#attr-input-type">type</a></code> attribute is in the <a href="#image-button-state" title="attr-input-type-image">Image Button</a> state, and the
   <code title="attr-input-src"><a href="#attr-input-src">src</a></code> attribute is set or
   changed.</li>

  </ul><p>Fetching the image must <a href="the-end.html#delay-the-load-event">delay the load event</a> of the
  element's document until the <a href="webappapis.html#concept-task" title="concept-task">task</a>
  that is <a href="webappapis.html#queue-a-task" title="queue a task">queued</a> by the
  <a href="webappapis.html#networking-task-source">networking task source</a> once the resource has been <a href="fetching-resources.html#fetch" title="fetch">fetched</a> (defined below) has been run.</p>

  <p>If the image was successfully obtained, with no network errors,
  and the image's type is a supported image type, and the image is a
  valid image of that type, then the image is said to be <dfn id="input-img-available" title="input-img-available"><i>available</i></dfn>. If this is true
  before the image is completely downloaded, each <a href="webappapis.html#concept-task" title="concept-task">task</a> that is <a href="webappapis.html#queue-a-task" title="queue a
  task">queued</a> by the <a href="webappapis.html#networking-task-source">networking task source</a> while
  the image is being <a href="fetching-resources.html#fetch" title="fetch">fetched</a> must update
  the presentation of the image appropriately.</p>

  <p>The user agents should apply the <a href="fetching-resources.html#content-type-sniffing:-image" title="Content-Type
  sniffing: image">image sniffing rules</a> to determine the type
  of the image, with the image's <a href="fetching-resources.html#content-type" title="Content-Type">associated
  Content-Type headers</a> giving the <var title="">official
  type</var>. If these rules are not applied, then the type of the
  image must be the type given by the image's <a href="fetching-resources.html#content-type" title="Content-Type">associated Content-Type headers</a>.</p>

  <p>User agents must not support non-image resources with the
  <code><a href="the-input-element.html#the-input-element">input</a></code> element. User agents must not run executable code
  embedded in the image resource. User agents must only display the
  first page of a multipage resource. User agents must not allow the
  resource to act in an interactive fashion, but should honor any
  animation in the resource.</p>

  <p>The <a href="webappapis.html#concept-task" title="concept-task">task</a> that is <a href="webappapis.html#queue-a-task" title="queue a task">queued</a> by the <a href="webappapis.html#networking-task-source">networking task
  source</a> once the resource has been <a href="fetching-resources.html#fetch" title="fetch">fetched</a>, must, if the download was successful
  and the image is <i title="input-img-available"><a href="#input-img-available">available</a></i>,
  <a href="webappapis.html#queue-a-task">queue a task</a> to <a href="webappapis.html#fire-a-simple-event">fire a simple event</a> named
  <code title="event-load">load</code> at the <code><a href="the-input-element.html#the-input-element">input</a></code>
  element; and otherwise, if the fetching process fails without a
  response from the remote server, or completes but the image is not a
  valid or supported image, <a href="webappapis.html#queue-a-task">queue a task</a> to <a href="webappapis.html#fire-a-simple-event">fire a
  simple event</a> named <code title="event-error">error</code> on
  the <code><a href="the-input-element.html#the-input-element">input</a></code> element.</p>

  <hr></div><p>The <dfn id="attr-input-alt" title="attr-input-alt"><code>alt</code></dfn> attribute
  provides the textual label for the alternative button for users and
  user agents who cannot use the image. The <code title="attr-input-alt"><a href="#attr-input-alt">alt</a></code> attribute must also be present,
  and must contain a non-empty string.</p><p>The <code><a href="the-input-element.html#the-input-element">input</a></code> element supports <a href="the-map-element.html#dimension-attributes">dimension
  attributes</a>.</p><div class="impl">

  <hr><p>If the <code title="attr-input-src"><a href="#attr-input-src">src</a></code> attribute is set,
  and the image is <i title="input-img-available"><a href="#input-img-available">available</a></i> and
  the user agent is configured to display that image, then: The
  element <a href="rendering.html#represents">represents</a> a control for selecting a <a href="#concept-input-type-image-coordinate" title="concept-input-type-image-coordinate">coordinate</a> from
  the image specified by the <code title="attr-input-src"><a href="#attr-input-src">src</a></code>
  attribute; if the element is <i title="concept-input-mutable"><a href="the-input-element.html#concept-input-mutable">mutable</a></i>, the user agent should
  allow the user to select this <a href="#concept-input-type-image-coordinate" title="concept-input-type-image-coordinate">coordinate</a>. The
  <a href="content-models.html#activation-behavior">activation behavior</a> in this case consists of taking the
  user's selected <a href="#concept-input-type-image-coordinate" title="concept-input-type-image-coordinate">coordinate</a>, and
  then, if the element has a <a href="association-of-controls-and-forms.html#form-owner">form owner</a>, <a href="association-of-controls-and-forms.html#concept-form-submit" title="concept-form-submit">submitting</a> the <code><a href="the-input-element.html#the-input-element">input</a></code>
  element's <a href="association-of-controls-and-forms.html#form-owner">form owner</a> from the <code><a href="the-input-element.html#the-input-element">input</a></code>
  element. If the user activates the control without explicitly
  selecting a coordinate, then the coordinate (0,0) must be
  assumed.</p>

  <p>Otherwise, the element <a href="rendering.html#represents">represents</a> a submit button
  whose label is given by the value of the <code title="attr-input-alt"><a href="#attr-input-alt">alt</a></code> attribute; if the element is <i title="concept-input-mutable"><a href="the-input-element.html#concept-input-mutable">mutable</a></i>, the user agent should
  allow the user to activate the button. The <a href="content-models.html#activation-behavior">activation
  behavior</a> in this case consists of setting the <a href="#concept-input-type-image-coordinate" title="concept-input-type-image-coordinate">selected
  coordinate</a> to (0,0), and then, if the element has a
  <a href="association-of-controls-and-forms.html#form-owner">form owner</a>, <a href="association-of-controls-and-forms.html#concept-form-submit" title="concept-form-submit">submitting</a> the <code><a href="the-input-element.html#the-input-element">input</a></code>
  element's <a href="association-of-controls-and-forms.html#form-owner">form owner</a> from the <code><a href="the-input-element.html#the-input-element">input</a></code>
  element.</p>

  <p>The <dfn id="concept-input-type-image-coordinate" title="concept-input-type-image-coordinate">selected
  coordinate</dfn> must consist of an <var title="">x</var>-component
  and a <var title="">y</var>-component. The coordinates represent the
  position relative to the edge of the image, with the coordinate
  space having the positive <var title="">x</var> direction to the
  right, and the positive <var title="">y</var> direction
  downwards.</p>

  <p>The <var title="">x</var>-component must be a <a href="common-microsyntaxes.html#valid-integer">valid
  integer</a> representing a number <var title="">x</var> in the
  range <span title="">&#8722;(<var title="">border<sub title="">left</sub></var>+<var title="">padding<sub title="">left</sub></var>) &#8804; <var title="">x</var> &#8804; <var title="">width</var>+<var title="">border<sub title="">right</sub></var>+<var title="">padding<sub title="">right</sub></var></span>, where <var title="">width</var>
  is the rendered width of the image, <var title="">border<sub title="">left</sub></var> is the width of the border on the left of
  the image, <var title="">padding<sub title="">left</sub></var> is
  the width of the padding on the left of the image, <var title="">border<sub title="">right</sub></var> is the width of the
  border on the right of the image, and <var title="">padding<sub title="">right</sub></var> is the width of the padding on the right
  of the image, with all dimensions given in CSS pixels.</p>

  <p>The <var title="">y</var>-component must be a <a href="common-microsyntaxes.html#valid-integer">valid
  integer</a> representing a number <var title="">y</var> in the
  range <span title="">&#8722;(<var title="">border<sub title="">top</sub></var>+<var title="">padding<sub title="">top</sub></var>) &#8804; <var title="">y</var> &#8804; <var title="">height</var>+<var title="">border<sub title="">bottom</sub></var>+<var title="">padding<sub title="">bottom</sub></var></span>, where <var title="">height</var>
  is the rendered height of the image, <var title="">border<sub title="">top</sub></var> is the width of the border above the image,
  <var title="">padding<sub title="">top</sub></var> is the width of
  the padding above the image, <var title="">border<sub title="">bottom</sub></var> is the width of the border below the
  image, and <var title="">padding<sub title="">bottom</sub></var> is
  the width of the padding below the image, with all dimensions given
  in CSS pixels.</p>

  <p>Where a border or padding is missing, its width is zero CSS
  pixels.</p>

  <hr></div><p>The <code title="attr-fs-formaction"><a href="association-of-controls-and-forms.html#attr-fs-formaction">formaction</a></code>, <code title="attr-fs-formenctype"><a href="association-of-controls-and-forms.html#attr-fs-formenctype">formenctype</a></code>, <code title="attr-fs-formmethod"><a href="association-of-controls-and-forms.html#attr-fs-formmethod">formmethod</a></code>, <code title="attr-fs-formnovalidate"><a href="association-of-controls-and-forms.html#attr-fs-formnovalidate">formnovalidate</a></code>, and <code title="attr-fs-formtarget"><a href="association-of-controls-and-forms.html#attr-fs-formtarget">formtarget</a></code> attributes are <a href="association-of-controls-and-forms.html#attributes-for-form-submission">attributes
  for form submission</a>.</p><div class="bookkeeping">

   <p>The following common <code><a href="the-input-element.html#the-input-element">input</a></code> element content
   attributes and IDL attributes apply to the element:
   <code title="attr-input-alt"><a href="#attr-input-alt">alt</a></code>,
   <code title="attr-fs-formaction"><a href="association-of-controls-and-forms.html#attr-fs-formaction">formaction</a></code>,
   <code title="attr-fs-formenctype"><a href="association-of-controls-and-forms.html#attr-fs-formenctype">formenctype</a></code>,
   <code title="attr-fs-formmethod"><a href="association-of-controls-and-forms.html#attr-fs-formmethod">formmethod</a></code>,
   <code title="attr-fs-formnovalidate"><a href="association-of-controls-and-forms.html#attr-fs-formnovalidate">formnovalidate</a></code>,
   <code title="attr-fs-formtarget"><a href="association-of-controls-and-forms.html#attr-fs-formtarget">formtarget</a></code>,
   <code title="attr-dim-height"><a href="the-map-element.html#attr-dim-height">height</a></code>,
   <code title="attr-input-src"><a href="#attr-input-src">src</a></code>, and
   <code title="attr-dim-width"><a href="the-map-element.html#attr-dim-width">width</a></code> content attributes;
   <code title="dom-input-value"><a href="common-input-element-attributes.html#dom-input-value">value</a></code> IDL attribute.</p>

   <p>The <code title="dom-input-value"><a href="common-input-element-attributes.html#dom-input-value">value</a></code> IDL attribute is
   in mode <a href="common-input-element-attributes.html#dom-input-value-default" title="dom-input-value-default">default</a>.</p>

   <p>The following content attributes must not be specified and do not
   apply to the element:
   <code class="no-backref" title="attr-input-accept"><a href="#attr-input-accept">accept</a></code>,
   <code class="no-backref" title="attr-input-autocomplete"><a href="common-input-element-attributes.html#attr-input-autocomplete">autocomplete</a></code>,
   <code class="no-backref" title="attr-input-checked"><a href="the-input-element.html#attr-input-checked">checked</a></code>,
   <code class="no-backref" title="attr-input-dirname"><a href="common-input-element-attributes.html#attr-input-dirname">dirname</a></code>,
   <code class="no-backref" title="attr-input-list"><a href="common-input-element-attributes.html#attr-input-list">list</a></code>,
   <code class="no-backref" title="attr-input-max"><a href="common-input-element-attributes.html#attr-input-max">max</a></code>,
   <code class="no-backref" title="attr-input-maxlength"><a href="common-input-element-attributes.html#attr-input-maxlength">maxlength</a></code>,
   <code class="no-backref" title="attr-input-min"><a href="common-input-element-attributes.html#attr-input-min">min</a></code>,
   <code class="no-backref" title="attr-input-multiple"><a href="common-input-element-attributes.html#attr-input-multiple">multiple</a></code>,
   <code class="no-backref" title="attr-input-pattern"><a href="common-input-element-attributes.html#attr-input-pattern">pattern</a></code>,
   <code class="no-backref" title="attr-input-placeholder"><a href="common-input-element-attributes.html#attr-input-placeholder">placeholder</a></code>,
   <code class="no-backref" title="attr-input-readonly"><a href="common-input-element-attributes.html#attr-input-readonly">readonly</a></code>,
   <code class="no-backref" title="attr-input-required"><a href="common-input-element-attributes.html#attr-input-required">required</a></code>,
   <code class="no-backref" title="attr-input-size"><a href="common-input-element-attributes.html#attr-input-size">size</a></code>, and
   <code class="no-backref" title="attr-input-step"><a href="common-input-element-attributes.html#attr-input-step">step</a></code>.</p>

   <p>The element's <code title="attr-input-value"><a href="the-input-element.html#attr-input-value">value</a></code>
   attribute must be omitted.</p>

   <p>The following IDL attributes and methods do not apply to the
   element:
   <code class="no-backref" title="dom-input-checked"><a href="common-input-element-attributes.html#dom-input-checked">checked</a></code>,
   <code class="no-backref" title="dom-input-files"><a href="common-input-element-attributes.html#dom-input-files">files</a></code>,
   <code class="no-backref" title="dom-input-list"><a href="common-input-element-attributes.html#dom-input-list">list</a></code>,
   <code class="no-backref" title="dom-input-selectedOption"><a href="common-input-element-attributes.html#dom-input-selectedoption">selectedOption</a></code>,
   <code class="no-backref" title="dom-textarea/input-selectionStart"><a href="association-of-controls-and-forms.html#dom-textarea-input-selectionstart">selectionStart</a></code>,
   <code class="no-backref" title="dom-textarea/input-selectionEnd"><a href="association-of-controls-and-forms.html#dom-textarea-input-selectionend">selectionEnd</a></code>,
   <code class="no-backref" title="dom-textarea/input-selectionDirection"><a href="association-of-controls-and-forms.html#dom-textarea-input-selectiondirection">selectionDirection</a></code>,
   <code class="no-backref" title="dom-input-valueAsDate"><a href="common-input-element-attributes.html#dom-input-valueasdate">valueAsDate</a></code>, and
   <code class="no-backref" title="dom-input-valueAsNumber"><a href="common-input-element-attributes.html#dom-input-valueasnumber">valueAsNumber</a></code> IDL attributes;
   <code class="no-backref" title="dom-textarea/input-select"><a href="association-of-controls-and-forms.html#dom-textarea-input-select">select()</a></code>,
   <code class="no-backref" title="dom-textarea/input-setSelectionRange"><a href="association-of-controls-and-forms.html#dom-textarea-input-setselectionrange">setSelectionRange()</a></code>,
   <code class="no-backref" title="dom-input-stepDown"><a href="common-input-element-attributes.html#dom-input-stepdown">stepDown()</a></code>, and
   <code class="no-backref" title="dom-input-stepUp"><a href="common-input-element-attributes.html#dom-input-stepup">stepUp()</a></code> methods.</p>

   <p>The <code class="no-backref" title="event-input-input"><a href="common-input-element-attributes.html#event-input-input">input</a></code> and <code class="no-backref" title="event-input-change"><a href="common-input-element-attributes.html#event-input-change">change</a></code> events do not apply.</p>

  </div><p class="note">Many aspects of this state's behavior are similar to
  the behavior of the <code><a href="embedded-content-1.html#the-img-element">img</a></code> element. Readers are encouraged
  to read that section, where many of the same requirements are
  described in more detail.</p><h6 id="reset-button-state"><span class="secno">4.10.7.1.21 </span><dfn title="attr-input-type-reset">Reset Button</dfn> state</h6><div class="impl">

  <p>When an <code><a href="the-input-element.html#the-input-element">input</a></code> element's <code title="attr-input-type"><a href="the-input-element.html#attr-input-type">type</a></code> attribute is in the <a href="#reset-button-state" title="attr-input-type-reset">Reset Button</a> state, the rules
  in this section apply.</p>

  </div><p>The <code><a href="the-input-element.html#the-input-element">input</a></code> element <a href="rendering.html#represents">represents</a> a button
  that, when activated, resets the form. <span class="impl">If the
  element has a <code title="attr-input-value"><a href="the-input-element.html#attr-input-value">value</a></code> attribute,
  the button's label must be the value of that attribute; otherwise,
  it must be an implementation-defined string that means "Reset" or
  some such.</span> The element is a <a href="forms.html#concept-button" title="concept-button">button</a>.</p><div class="impl">

  <p>If the element is <i title="concept-input-mutable"><a href="the-input-element.html#concept-input-mutable">mutable</a></i>,
  the user agent should allow the user to activate the element.</p>

  <p>The element's <a href="content-models.html#activation-behavior">activation behavior</a>, if the element
  has a <a href="association-of-controls-and-forms.html#form-owner">form owner</a>, is to <a href="association-of-controls-and-forms.html#concept-form-reset" title="concept-form-reset">reset</a> the <a href="association-of-controls-and-forms.html#form-owner">form owner</a>;
  otherwise, it is to do nothing.</p>

  <p><strong>Constraint validation</strong>: The element is
  <a href="association-of-controls-and-forms.html#barred-from-constraint-validation">barred from constraint validation</a>.</p>

  </div><div class="bookkeeping">

   <p>The <code title="dom-input-value"><a href="common-input-element-attributes.html#dom-input-value">value</a></code> IDL attribute
   applies to this element and is in mode <a href="common-input-element-attributes.html#dom-input-value-default" title="dom-input-value-default">default</a>.</p>

   <p>The following content attributes must not be specified and do not
   apply to the element:
   <code class="no-backref" title="attr-input-accept"><a href="#attr-input-accept">accept</a></code>,
   <code class="no-backref" title="attr-input-alt"><a href="#attr-input-alt">alt</a></code>,
   <code class="no-backref" title="attr-input-autocomplete"><a href="common-input-element-attributes.html#attr-input-autocomplete">autocomplete</a></code>,
   <code class="no-backref" title="attr-input-checked"><a href="the-input-element.html#attr-input-checked">checked</a></code>,
   <code class="no-backref" title="attr-input-dirname"><a href="common-input-element-attributes.html#attr-input-dirname">dirname</a></code>,
   <code class="no-backref" title="attr-fs-formaction"><a href="association-of-controls-and-forms.html#attr-fs-formaction">formaction</a></code>,
   <code class="no-backref" title="attr-fs-formenctype"><a href="association-of-controls-and-forms.html#attr-fs-formenctype">formenctype</a></code>,
   <code class="no-backref" title="attr-fs-formmethod"><a href="association-of-controls-and-forms.html#attr-fs-formmethod">formmethod</a></code>,
   <code class="no-backref" title="attr-fs-formnovalidate"><a href="association-of-controls-and-forms.html#attr-fs-formnovalidate">formnovalidate</a></code>,
   <code class="no-backref" title="attr-fs-formtarget"><a href="association-of-controls-and-forms.html#attr-fs-formtarget">formtarget</a></code>,
   <code class="no-backref" title="attr-dim-height"><a href="the-map-element.html#attr-dim-height">height</a></code>,
   <code class="no-backref" title="attr-input-list"><a href="common-input-element-attributes.html#attr-input-list">list</a></code>,
   <code class="no-backref" title="attr-input-max"><a href="common-input-element-attributes.html#attr-input-max">max</a></code>,
   <code class="no-backref" title="attr-input-maxlength"><a href="common-input-element-attributes.html#attr-input-maxlength">maxlength</a></code>,
   <code class="no-backref" title="attr-input-min"><a href="common-input-element-attributes.html#attr-input-min">min</a></code>,
   <code class="no-backref" title="attr-input-multiple"><a href="common-input-element-attributes.html#attr-input-multiple">multiple</a></code>,
   <code class="no-backref" title="attr-input-pattern"><a href="common-input-element-attributes.html#attr-input-pattern">pattern</a></code>,
   <code class="no-backref" title="attr-input-placeholder"><a href="common-input-element-attributes.html#attr-input-placeholder">placeholder</a></code>,
   <code class="no-backref" title="attr-input-readonly"><a href="common-input-element-attributes.html#attr-input-readonly">readonly</a></code>,
   <code class="no-backref" title="attr-input-required"><a href="common-input-element-attributes.html#attr-input-required">required</a></code>,
   <code class="no-backref" title="attr-input-size"><a href="common-input-element-attributes.html#attr-input-size">size</a></code>,
   <code class="no-backref" title="attr-input-src"><a href="#attr-input-src">src</a></code>,
   <code class="no-backref" title="attr-input-step"><a href="common-input-element-attributes.html#attr-input-step">step</a></code>, and
   <code class="no-backref" title="attr-dim-width"><a href="the-map-element.html#attr-dim-width">width</a></code>.</p>

   <p>The following IDL attributes and methods do not apply to the
   element:
   <code class="no-backref" title="dom-input-checked"><a href="common-input-element-attributes.html#dom-input-checked">checked</a></code>,
   <code class="no-backref" title="dom-input-files"><a href="common-input-element-attributes.html#dom-input-files">files</a></code>,
   <code class="no-backref" title="dom-input-list"><a href="common-input-element-attributes.html#dom-input-list">list</a></code>,
   <code class="no-backref" title="dom-input-selectedOption"><a href="common-input-element-attributes.html#dom-input-selectedoption">selectedOption</a></code>,
   <code class="no-backref" title="dom-textarea/input-selectionStart"><a href="association-of-controls-and-forms.html#dom-textarea-input-selectionstart">selectionStart</a></code>,
   <code class="no-backref" title="dom-textarea/input-selectionEnd"><a href="association-of-controls-and-forms.html#dom-textarea-input-selectionend">selectionEnd</a></code>,
   <code class="no-backref" title="dom-textarea/input-selectionDirection"><a href="association-of-controls-and-forms.html#dom-textarea-input-selectiondirection">selectionDirection</a></code>,
   <code class="no-backref" title="dom-input-valueAsDate"><a href="common-input-element-attributes.html#dom-input-valueasdate">valueAsDate</a></code>, and
   <code class="no-backref" title="dom-input-valueAsNumber"><a href="common-input-element-attributes.html#dom-input-valueasnumber">valueAsNumber</a></code> IDL attributes;
   <code class="no-backref" title="dom-textarea/input-select"><a href="association-of-controls-and-forms.html#dom-textarea-input-select">select()</a></code>,
   <code class="no-backref" title="dom-textarea/input-setSelectionRange"><a href="association-of-controls-and-forms.html#dom-textarea-input-setselectionrange">setSelectionRange()</a></code>,
   <code class="no-backref" title="dom-input-stepDown"><a href="common-input-element-attributes.html#dom-input-stepdown">stepDown()</a></code>, and
   <code class="no-backref" title="dom-input-stepUp"><a href="common-input-element-attributes.html#dom-input-stepup">stepUp()</a></code> methods.</p>

   <p>The <code class="no-backref" title="event-input-input"><a href="common-input-element-attributes.html#event-input-input">input</a></code> and <code class="no-backref" title="event-input-change"><a href="common-input-element-attributes.html#event-input-change">change</a></code> events do not apply.</p>

  </div><h6 id="button-state"><span class="secno">4.10.7.1.22 </span><dfn title="attr-input-type-button">Button</dfn> state</h6><div class="impl">

  <p>When an <code><a href="the-input-element.html#the-input-element">input</a></code> element's <code title="attr-input-type"><a href="the-input-element.html#attr-input-type">type</a></code> attribute is in the <a href="#button-state" title="attr-input-type-button">Button</a> state, the rules in
  this section apply.</p>

  </div><p>The <code><a href="the-input-element.html#the-input-element">input</a></code> element <a href="rendering.html#represents">represents</a> a button
  with no default behavior. A label for the button must be provided in
  the <code title="attr-input-value"><a href="the-input-element.html#attr-input-value">value</a></code> attribute, though it
  may be the empty string. <span class="impl">If the element has a
  <code title="attr-input-value"><a href="the-input-element.html#attr-input-value">value</a></code> attribute, the button's
  label must be the value of that attribute; otherwise, it must be the
  empty string.</span> The element is a <a href="forms.html#concept-button" title="concept-button">button</a>.</p><div class="impl">

  <p>If the element is <i title="concept-input-mutable"><a href="the-input-element.html#concept-input-mutable">mutable</a></i>,
  the user agent should allow the user to activate the element. The
  element's <a href="content-models.html#activation-behavior">activation behavior</a> is to do nothing.</p>

  <p><strong>Constraint validation</strong>: The element is
  <a href="association-of-controls-and-forms.html#barred-from-constraint-validation">barred from constraint validation</a>.</p>

  </div><div class="bookkeeping">

   <p>The <code title="dom-input-value"><a href="common-input-element-attributes.html#dom-input-value">value</a></code> IDL attribute
   applies to this element and is in mode <a href="common-input-element-attributes.html#dom-input-value-default" title="dom-input-value-default">default</a>.</p>

   <p>The following content attributes must not be specified and do not
   apply to the element:
   <code class="no-backref" title="attr-input-accept"><a href="#attr-input-accept">accept</a></code>,
   <code class="no-backref" title="attr-input-alt"><a href="#attr-input-alt">alt</a></code>,
   <code class="no-backref" title="attr-input-autocomplete"><a href="common-input-element-attributes.html#attr-input-autocomplete">autocomplete</a></code>,
   <code class="no-backref" title="attr-input-checked"><a href="the-input-element.html#attr-input-checked">checked</a></code>,
   <code class="no-backref" title="attr-input-dirname"><a href="common-input-element-attributes.html#attr-input-dirname">dirname</a></code>,
   <code class="no-backref" title="attr-fs-formaction"><a href="association-of-controls-and-forms.html#attr-fs-formaction">formaction</a></code>,
   <code class="no-backref" title="attr-fs-formenctype"><a href="association-of-controls-and-forms.html#attr-fs-formenctype">formenctype</a></code>,
   <code class="no-backref" title="attr-fs-formmethod"><a href="association-of-controls-and-forms.html#attr-fs-formmethod">formmethod</a></code>,
   <code class="no-backref" title="attr-fs-formnovalidate"><a href="association-of-controls-and-forms.html#attr-fs-formnovalidate">formnovalidate</a></code>,
   <code class="no-backref" title="attr-fs-formtarget"><a href="association-of-controls-and-forms.html#attr-fs-formtarget">formtarget</a></code>,
   <code class="no-backref" title="attr-dim-height"><a href="the-map-element.html#attr-dim-height">height</a></code>,
   <code class="no-backref" title="attr-input-list"><a href="common-input-element-attributes.html#attr-input-list">list</a></code>,
   <code class="no-backref" title="attr-input-max"><a href="common-input-element-attributes.html#attr-input-max">max</a></code>,
   <code class="no-backref" title="attr-input-maxlength"><a href="common-input-element-attributes.html#attr-input-maxlength">maxlength</a></code>,
   <code class="no-backref" title="attr-input-min"><a href="common-input-element-attributes.html#attr-input-min">min</a></code>,
   <code class="no-backref" title="attr-input-multiple"><a href="common-input-element-attributes.html#attr-input-multiple">multiple</a></code>,
   <code class="no-backref" title="attr-input-pattern"><a href="common-input-element-attributes.html#attr-input-pattern">pattern</a></code>,
   <code class="no-backref" title="attr-input-placeholder"><a href="common-input-element-attributes.html#attr-input-placeholder">placeholder</a></code>,
   <code class="no-backref" title="attr-input-readonly"><a href="common-input-element-attributes.html#attr-input-readonly">readonly</a></code>,
   <code class="no-backref" title="attr-input-required"><a href="common-input-element-attributes.html#attr-input-required">required</a></code>,
   <code class="no-backref" title="attr-input-size"><a href="common-input-element-attributes.html#attr-input-size">size</a></code>,
   <code class="no-backref" title="attr-input-src"><a href="#attr-input-src">src</a></code>,
   <code class="no-backref" title="attr-input-step"><a href="common-input-element-attributes.html#attr-input-step">step</a></code>, and
   <code class="no-backref" title="attr-dim-width"><a href="the-map-element.html#attr-dim-width">width</a></code>.</p>

   <p>The following IDL attributes and methods do not apply to the
   element:
   <code class="no-backref" title="dom-input-checked"><a href="common-input-element-attributes.html#dom-input-checked">checked</a></code>,
   <code class="no-backref" title="dom-input-files"><a href="common-input-element-attributes.html#dom-input-files">files</a></code>,
   <code class="no-backref" title="dom-input-list"><a href="common-input-element-attributes.html#dom-input-list">list</a></code>,
   <code class="no-backref" title="dom-input-selectedOption"><a href="common-input-element-attributes.html#dom-input-selectedoption">selectedOption</a></code>,
   <code class="no-backref" title="dom-textarea/input-selectionStart"><a href="association-of-controls-and-forms.html#dom-textarea-input-selectionstart">selectionStart</a></code>,
   <code class="no-backref" title="dom-textarea/input-selectionEnd"><a href="association-of-controls-and-forms.html#dom-textarea-input-selectionend">selectionEnd</a></code>,
   <code class="no-backref" title="dom-textarea/input-selectionDirection"><a href="association-of-controls-and-forms.html#dom-textarea-input-selectiondirection">selectionDirection</a></code>,
   <code class="no-backref" title="dom-input-valueAsDate"><a href="common-input-element-attributes.html#dom-input-valueasdate">valueAsDate</a></code>, and
   <code class="no-backref" title="dom-input-valueAsNumber"><a href="common-input-element-attributes.html#dom-input-valueasnumber">valueAsNumber</a></code> IDL attributes;
   <code class="no-backref" title="dom-textarea/input-select"><a href="association-of-controls-and-forms.html#dom-textarea-input-select">select()</a></code>,
   <code class="no-backref" title="dom-textarea/input-setSelectionRange"><a href="association-of-controls-and-forms.html#dom-textarea-input-setselectionrange">setSelectionRange()</a></code>,
   <code class="no-backref" title="dom-input-stepDown"><a href="common-input-element-attributes.html#dom-input-stepdown">stepDown()</a></code>, and
   <code class="no-backref" title="dom-input-stepUp"><a href="common-input-element-attributes.html#dom-input-stepup">stepUp()</a></code> methods.</p>

   <p>The <code class="no-backref" title="event-input-input"><a href="common-input-element-attributes.html#event-input-input">input</a></code> and <code class="no-backref" title="event-input-change"><a href="common-input-element-attributes.html#event-input-change">change</a></code> events do not apply.</p>

  </div></body></html>