Annotation of html5/spec/the-select-element.html, revision 1.105
1.88 mike 1: <!DOCTYPE html>
1.96 mike 2: <html lang="en-US-x-Hixie"><head><title>4.10.9 The select element — HTML5</title><link rel="stylesheet" href="alert.css"><style type="text/css">
1.1 mike 3: pre { margin-left: 2em; white-space: pre-wrap; }
4: h2 { margin: 3em 0 1em 0; }
5: h3 { margin: 2.5em 0 1em 0; }
6: h4 { margin: 2.5em 0 0.75em 0; }
7: h5, h6 { margin: 2.5em 0 1em; }
8: h1 + h2, h1 + h2 + h2 { margin: 0.75em 0 0.75em; }
9: h2 + h3, h3 + h4, h4 + h5, h5 + h6 { margin-top: 0.5em; }
10: p { margin: 1em 0; }
11: hr:not(.top) { display: block; background: none; border: none; padding: 0; margin: 2em 0; height: auto; }
12: dl, dd { margin-top: 0; margin-bottom: 0; }
13: dt { margin-top: 0.75em; margin-bottom: 0.25em; clear: left; }
14: dt + dt { margin-top: 0; }
15: dd dt { margin-top: 0.25em; margin-bottom: 0; }
16: dd p { margin-top: 0; }
17: dd dl + p { margin-top: 1em; }
18: dd table + p { margin-top: 1em; }
19: p + * > li, dd li { margin: 1em 0; }
20: dt, dfn { font-weight: bold; font-style: normal; }
21: i, em { font-style: italic; }
22: dt dfn { font-style: italic; }
23: pre, code { font-size: inherit; font-family: monospace; font-variant: normal; }
24: pre strong { color: black; font: inherit; font-weight: bold; background: yellow; }
25: pre em { font-weight: bolder; font-style: normal; }
26: @media screen { code { color: orangered; } code :link, code :visited { color: inherit; } }
27: var sub { vertical-align: bottom; font-size: smaller; position: relative; top: 0.1em; }
28: table { border-collapse: collapse; border-style: hidden hidden none hidden; }
29: table thead, table tbody { border-bottom: solid; }
30: table tbody th:first-child { border-left: solid; }
31: table tbody th { text-align: left; }
32: table td, table th { border-left: solid; border-right: solid; border-bottom: solid thin; vertical-align: top; padding: 0.2em; }
33: blockquote { margin: 0 0 0 2em; border: 0; padding: 0; font-style: italic; }
34:
35: .bad, .bad *:not(.XXX) { color: gray; border-color: gray; background: transparent; }
36: .matrix, .matrix td { border: none; text-align: right; }
37: .matrix { margin-left: 2em; }
38: .dice-example { border-collapse: collapse; border-style: hidden solid solid hidden; border-width: thin; margin-left: 3em; }
39: .dice-example caption { width: 30em; font-size: smaller; font-style: italic; padding: 0.75em 0; text-align: left; }
40: .dice-example td, .dice-example th { border: solid thin; width: 1.35em; height: 1.05em; text-align: center; padding: 0; }
41:
42: .toc dfn, h1 dfn, h2 dfn, h3 dfn, h4 dfn, h5 dfn, h6 dfn { font: inherit; }
43: img.extra, p.overview { float: right; }
44: pre.idl { border: solid thin; background: #EEEEEE; color: black; padding: 0.5em 1em; position: relative; }
45: pre.idl :link, pre.idl :visited { color: inherit; background: transparent; }
46: pre.idl::before { content: "IDL"; font: bold small sans-serif; padding: 0.5em; background: white; position: absolute; top: 0; margin: -1px 0 0 -4em; width: 1.5em; border: thin solid; border-radius: 0 0 0 0.5em }
47: pre.css { border: solid thin; background: #FFFFEE; color: black; padding: 0.5em 1em; }
48: pre.css:first-line { color: #AAAA50; }
49: dl.domintro { color: green; margin: 2em 0 2em 2em; padding: 0.5em 1em; border: none; background: #DDFFDD; }
50: hr + dl.domintro, div.impl + dl.domintro { margin-top: 2.5em; margin-bottom: 1.5em; }
51: dl.domintro dt, dl.domintro dt * { color: black; text-decoration: none; }
52: dl.domintro dd { margin: 0.5em 0 1em 2em; padding: 0; }
53: dl.domintro dd p { margin: 0.5em 0; }
54: dl.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; }
55: dl.switch { padding-left: 2em; }
56: dl.switch > dt { text-indent: -1.5em; }
57: dl.switch > dt:before { content: '\21AA'; padding: 0 0.5em 0 0; display: inline-block; width: 1em; text-align: right; line-height: 0.5em; }
58: dl.triple { padding: 0 0 0 1em; }
59: dl.triple dt, dl.triple dd { margin: 0; display: inline }
60: dl.triple dt:after { content: ':'; }
61: dl.triple dd:after { content: '\A'; white-space: pre; }
62: .diff-old { text-decoration: line-through; color: silver; background: transparent; }
63: .diff-chg, .diff-new { text-decoration: underline; color: green; background: transparent; }
64: a .diff-new { border-bottom: 1px blue solid; }
65:
66: h2 { page-break-before: always; }
67: h1, h2, h3, h4, h5, h6 { page-break-after: avoid; }
68: h1 + h2, hr + h2.no-toc { page-break-before: auto; }
69:
70: p > span:not([title=""]):not([class="XXX"]):not([class="impl"]):not([class="note"]),
71: li > span:not([title=""]):not([class="XXX"]):not([class="impl"]):not([class="note"]), { border-bottom: solid #9999CC; }
72:
73: div.head { margin: 0 0 1em; padding: 1em 0 0 0; }
74: div.head p { margin: 0; }
75: div.head h1 { margin: 0; }
76: div.head .logo { float: right; margin: 0 1em; }
77: div.head .logo img { border: none } /* remove border from top image */
78: div.head dl { margin: 1em 0; }
79: div.head p.copyright, div.head p.alt { font-size: x-small; font-style: oblique; margin: 0; }
80:
81: body > .toc > li { margin-top: 1em; margin-bottom: 1em; }
82: body > .toc.brief > li { margin-top: 0.35em; margin-bottom: 0.35em; }
83: body > .toc > li > * { margin-bottom: 0.5em; }
84: body > .toc > li > * > li > * { margin-bottom: 0.25em; }
85: .toc, .toc li { list-style: none; }
86:
87: .brief { margin-top: 1em; margin-bottom: 1em; line-height: 1.1; }
88: .brief li { margin: 0; padding: 0; }
89: .brief li p { margin: 0; padding: 0; }
90:
91: .category-list { margin-top: -0.75em; margin-bottom: 1em; line-height: 1.5; }
92: .category-list::before { content: '\21D2\A0'; font-size: 1.2em; font-weight: 900; }
93: .category-list li { display: inline; }
94: .category-list li:not(:last-child)::after { content: ', '; }
95: .category-list li > span, .category-list li > a { text-transform: lowercase; }
96: .category-list li * { text-transform: none; } /* don't affect <code> nested in <a> */
97:
98: .XXX { color: #E50000; background: white; border: solid red; padding: 0.5em; margin: 1em 0; }
99: .XXX > :first-child { margin-top: 0; }
100: p .XXX { line-height: 3em; }
101: .annotation { border: solid thin black; background: #0C479D; color: white; position: relative; margin: 8px 0 20px 0; }
102: .annotation:before { position: absolute; left: 0; top: 0; width: 100%; height: 100%; margin: 6px -6px -6px 6px; background: #333333; z-index: -1; content: ''; }
103: .annotation :link, .annotation :visited { color: inherit; }
104: .annotation :link:hover, .annotation :visited:hover { background: transparent; }
105: .annotation span { border: none ! important; }
106: .note { color: green; background: transparent; font-family: sans-serif; }
107: .warning { color: red; background: transparent; }
108: .note, .warning { font-weight: bolder; font-style: italic; }
109: .note em, .warning em, .note i, .warning i { font-style: normal; }
110: p.note, div.note { padding: 0.5em 2em; }
111: span.note { padding: 0 2em; }
112: .note p:first-child, .warning p:first-child { margin-top: 0; }
113: .note p:last-child, .warning p:last-child { margin-bottom: 0; }
114: .warning:before { font-style: normal; }
115: p.note:before { content: 'Note: '; }
116: p.warning:before { content: '\26A0 Warning! '; }
117:
118: .bookkeeping:before { display: block; content: 'Bookkeeping details'; font-weight: bolder; font-style: italic; }
119: .bookkeeping { font-size: 0.8em; margin: 2em 0; }
120: .bookkeeping p { margin: 0.5em 2em; display: list-item; list-style: square; }
121: .bookkeeping dt { margin: 0.5em 2em 0; }
122: .bookkeeping dd { margin: 0 3em 0.5em; }
123:
124: h4 { position: relative; z-index: 3; }
125: h4 + .element, h4 + div + .element { margin-top: -2.5em; padding-top: 2em; }
126: .element {
127: background: #EEEEFF;
128: color: black;
129: margin: 0 0 1em 0.15em;
130: padding: 0 1em 0.25em 0.75em;
131: border-left: solid #9999FF 0.25em;
132: position: relative;
133: z-index: 1;
134: }
135: .element:before {
136: position: absolute;
137: z-index: 2;
138: top: 0;
139: left: -1.15em;
140: height: 2em;
141: width: 0.9em;
142: background: #EEEEFF;
143: content: ' ';
144: border-style: none none solid solid;
145: border-color: #9999FF;
146: border-width: 0.25em;
147: }
148:
149: .example { display: block; color: #222222; background: #FCFCFC; border-left: double; margin-left: 2em; padding-left: 1em; }
150: td > .example:only-child { margin: 0 0 0 0.1em; }
151:
152: ul.domTree, ul.domTree ul { padding: 0 0 0 1em; margin: 0; }
153: ul.domTree li { padding: 0; margin: 0; list-style: none; position: relative; }
154: ul.domTree li li { list-style: none; }
155: 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; }
156: 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; }
157: ul.domTree span { font-style: italic; font-family: serif; }
158: ul.domTree .t1 code { color: purple; font-weight: bold; }
159: ul.domTree .t2 { font-style: normal; font-family: monospace; }
160: ul.domTree .t2 .name { color: black; font-weight: bold; }
161: ul.domTree .t2 .value { color: blue; font-weight: normal; }
162: ul.domTree .t3 code, .domTree .t4 code, .domTree .t5 code { color: gray; }
163: ul.domTree .t7 code, .domTree .t8 code { color: green; }
164: ul.domTree .t10 code { color: teal; }
165:
166: body.dfnEnabled dfn { cursor: pointer; }
167: .dfnPanel {
168: display: inline;
169: position: absolute;
170: z-index: 10;
171: height: auto;
172: width: auto;
173: padding: 0.5em 0.75em;
174: font: small sans-serif, Droid Sans Fallback;
175: background: #DDDDDD;
176: color: black;
177: border: outset 0.2em;
178: }
179: .dfnPanel * { margin: 0; padding: 0; font: inherit; text-indent: 0; }
180: .dfnPanel :link, .dfnPanel :visited { color: black; }
181: .dfnPanel p { font-weight: bolder; }
182: .dfnPanel * + p { margin-top: 0.25em; }
183: .dfnPanel li { list-style-position: inside; }
184:
185: #configUI { position: absolute; z-index: 20; top: 10em; right: 1em; width: 11em; font-size: small; }
186: #configUI p { margin: 0.5em 0; padding: 0.3em; background: #EEEEEE; color: black; border: inset thin; }
187: #configUI p label { display: block; }
188: #configUI #updateUI, #configUI .loginUI { text-align: center; }
189: #configUI input[type=button] { display: block; margin: auto; }
190:
191: fieldset { margin: 1em; padding: 0.5em 1em; }
192: fieldset > legend + * { margin-top: 0; }
193: fieldset > :last-child { margin-bottom: 0; }
194: fieldset p { margin: 0.5em 0; }
195:
1.85 mike 196: .stability {
197: position: fixed;
198: bottom: 0;
199: left: 0; right: 0;
200: margin: 0 auto 0 auto;
201: width: 50%;
202: background: maroon; color: yellow;
203: -webkit-border-radius: 1em 1em 0 0;
204: -moz-border-radius: 1em 1em 0 0;
205: border-radius: 1em 1em 0 0;
206: -moz-box-shadow: 0 0 1em #500;
207: -webkit-box-shadow: 0 0 1em #500;
208: box-shadow: 0 0 1em red;
209: padding: 0.5em 1em;
210: text-align: center;
211: }
212: .stability strong {
213: display: block;
214: }
215: .stability input {
216: appearance: none; margin: 0; border: 0; padding: 0.25em 0.5em; background: transparent; color: black;
217: position: absolute; top: -0.5em; right: 0; font: 1.25em sans-serif; text-align: center;
218: }
219: .stability input:hover {
220: color: white;
221: text-shadow: 0 0 2px black;
222: }
223: .stability input:active {
224: padding: 0.3em 0.45em 0.2em 0.55em;
225: }
226: .stability :link, .stability :visited,
227: .stability :link:hover, .stability :visited:hover {
228: background: transparent;
229: color: white;
230: }
231:
232: </style><link href="http://www.w3.org/StyleSheets/TR/W3C-WD" rel="stylesheet" type="text/css"><meta content="noindex" name="robots"><style type="text/css">
1.1 mike 233:
234: .applies thead th > * { display: block; }
235: .applies thead code { display: block; }
236: .applies tbody th { whitespace: nowrap; }
237: .applies td { text-align: center; }
238: .applies .yes { background: yellow; }
239:
240: .matrix, .matrix td { border: hidden; text-align: right; }
241: .matrix { margin-left: 2em; }
242:
243: .dice-example { border-collapse: collapse; border-style: hidden solid solid hidden; border-width: thin; margin-left: 3em; }
244: .dice-example caption { width: 30em; font-size: smaller; font-style: italic; padding: 0.75em 0; text-align: left; }
245: .dice-example td, .dice-example th { border: solid thin; width: 1.35em; height: 1.05em; text-align: center; padding: 0; }
246:
247: td.eg { border-width: thin; text-align: center; }
248:
249: #table-example-1 { border: solid thin; border-collapse: collapse; margin-left: 3em; }
250: #table-example-1 * { font-family: "Essays1743", serif; line-height: 1.01em; }
251: #table-example-1 caption { padding-bottom: 0.5em; }
252: #table-example-1 thead, #table-example-1 tbody { border: none; }
253: #table-example-1 th, #table-example-1 td { border: solid thin; }
254: #table-example-1 th { font-weight: normal; }
255: #table-example-1 td { border-style: none solid; vertical-align: top; }
256: #table-example-1 th { padding: 0.5em; vertical-align: middle; text-align: center; }
257: #table-example-1 tbody tr:first-child td { padding-top: 0.5em; }
258: #table-example-1 tbody tr:last-child td { padding-bottom: 1.5em; }
259: #table-example-1 tbody td:first-child { padding-left: 2.5em; padding-right: 0; width: 9em; }
260: #table-example-1 tbody td:first-child::after { content: leader(". "); }
261: #table-example-1 tbody td { padding-left: 2em; padding-right: 2em; }
262: #table-example-1 tbody td:first-child + td { width: 10em; }
263: #table-example-1 tbody td:first-child + td ~ td { width: 2.5em; }
264: #table-example-1 tbody td:first-child + td + td + td ~ td { width: 1.25em; }
265:
266: .apple-table-examples { border: none; border-collapse: separate; border-spacing: 1.5em 0em; width: 40em; margin-left: 3em; }
267: .apple-table-examples * { font-family: "Times", serif; }
268: .apple-table-examples td, .apple-table-examples th { border: none; white-space: nowrap; padding-top: 0; padding-bottom: 0; }
269: .apple-table-examples tbody th:first-child { border-left: none; width: 100%; }
270: .apple-table-examples thead th:first-child ~ th { font-size: smaller; font-weight: bolder; border-bottom: solid 2px; text-align: center; }
271: .apple-table-examples tbody th::after, .apple-table-examples tfoot th::after { content: leader(". ") }
272: .apple-table-examples tbody th, .apple-table-examples tfoot th { font: inherit; text-align: left; }
273: .apple-table-examples td { text-align: right; vertical-align: top; }
274: .apple-table-examples.e1 tbody tr:last-child td { border-bottom: solid 1px; }
275: .apple-table-examples.e1 tbody + tbody tr:last-child td { border-bottom: double 3px; }
276: .apple-table-examples.e2 th[scope=row] { padding-left: 1em; }
277: .apple-table-examples sup { line-height: 0; }
278:
279: .details-example img { vertical-align: top; }
280:
281: #base64-table {
282: white-space: nowrap;
283: font-size: 0.6em;
284: column-width: 6em;
285: column-count: 5;
286: column-gap: 1em;
287: -moz-column-width: 6em;
288: -moz-column-count: 5;
289: -moz-column-gap: 1em;
290: -webkit-column-width: 6em;
291: -webkit-column-count: 5;
292: -webkit-column-gap: 1em;
293: }
294: #base64-table thead { display: none; }
295: #base64-table * { border: none; }
296: #base64-table tbody td:first-child:after { content: ':'; }
297: #base64-table tbody td:last-child { text-align: right; }
298:
299: #named-character-references-table {
300: white-space: nowrap;
301: font-size: 0.6em;
302: column-width: 30em;
303: column-gap: 1em;
304: -moz-column-width: 30em;
305: -moz-column-gap: 1em;
306: -webkit-column-width: 30em;
307: -webkit-column-gap: 1em;
308: }
309: #named-character-references-table > table > tbody > tr > td:first-child + td,
310: #named-character-references-table > table > tbody > tr > td:last-child { text-align: center; }
311: #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; }
312: #named-character-references-table > table > tbody > tr#entity-CounterClockwiseContourIntegral > td:first-child { font-size: 0.5em; }
313:
314: .glyph.control { color: red; }
315:
316: @font-face {
317: font-family: 'Essays1743';
318: src: url('http://www.whatwg.org/specs/web-apps/current-work/fonts/Essays1743.ttf');
319: }
320: @font-face {
321: font-family: 'Essays1743';
322: font-weight: bold;
323: src: url('http://www.whatwg.org/specs/web-apps/current-work/fonts/Essays1743-Bold.ttf');
324: }
325: @font-face {
326: font-family: 'Essays1743';
327: font-style: italic;
328: src: url('http://www.whatwg.org/specs/web-apps/current-work/fonts/Essays1743-Italic.ttf');
329: }
330: @font-face {
331: font-family: 'Essays1743';
332: font-style: italic;
333: font-weight: bold;
334: src: url('http://www.whatwg.org/specs/web-apps/current-work/fonts/Essays1743-BoldItalic.ttf');
335: }
336:
337: </style><link href="data:text/css," id="complete" rel="stylesheet" title="Complete specification"><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"><script type="text/javascript">
338: function getCookie(name) {
339: var params = location.search.substr(1).split("&");
340: for (var index = 0; index < params.length; index++) {
341: if (params[index] == name)
342: return "1";
343: var data = params[index].split("=");
344: if (data[0] == name)
345: return unescape(data[1]);
346: }
347: var cookies = document.cookie.split("; ");
348: for (var index = 0; index < cookies.length; index++) {
349: var data = cookies[index].split("=");
350: if (data[0] == name)
351: return unescape(data[1]);
352: }
353: return null;
354: }
1.96 mike 355: </script>
1.1 mike 356: <script src="link-fixup.js"></script>
357: <link href="the-button-element.html" title="4.10.8 The button element" rel="prev">
358: <link href="index.html#contents" title="Table of contents" rel="contents">
359: <link href="the-datalist-element.html" title="4.10.10 The datalist element" rel="next">
1.22 mike 360: </head><body onload="fixBrokenLink();" class="split chapter"><div class="head" id="head">
1.1 mike 361: <p><a href="http://www.w3.org/"><img alt="W3C" height="48" src="http://www.w3.org/Icons/w3c_home" width="72"></a></p>
362:
363: <h1>HTML5</h1>
1.105 ! mike 364: <h2 class="no-num no-toc" id="a-vocabulary-and-associated-apis-for-html-and-xhtml">A vocabulary and associated APIs for HTML and XHTML</h2><p>This is revision 1.5620.</p>
1.1 mike 365:
1.98 mike 366: <h2 class="no-num no-toc" id="w3c-working-draft-29-march-2012">W3C Working Draft 29 March 2012</h2>
1.85 mike 367: </div>
368:
369: <nav class="prev_next">
1.1 mike 370: <a href="the-button-element.html">← 4.10.8 The button element</a> –
371: <a href="index.html#contents">Table of contents</a> –
372: <a href="the-datalist-element.html">4.10.10 The datalist element →</a>
373: </nav>
374:
1.85 mike 375: <h4 id="the-select-element"><span class="secno">4.10.9 </span>The <dfn><code>select</code></dfn> element</h4>
376:
377: <dl class="element"><dt><a href="element-definitions.html#element-dfn-categories" title="element-dfn-categories">Categories</a>:</dt>
1.1 mike 378: <dd><a href="content-models.html#flow-content">Flow content</a>.</dd>
379: <dd><a href="content-models.html#phrasing-content">Phrasing content</a>.</dd>
380: <dd><a href="content-models.html#interactive-content">Interactive content</a>.</dd>
381: <dd><a href="forms.html#category-listed" title="category-listed">Listed</a>, <a href="forms.html#category-label" title="category-label">labelable</a>, <a href="forms.html#category-submit" title="category-submit">submittable</a>, and <a href="forms.html#category-reset" title="category-reset">resettable</a> <a href="forms.html#form-associated-element">form-associated element</a>.</dd>
382: <dd><a href="content-models.html#palpable-content">Palpable content</a>.</dd>
1.25 mike 383: <dt><a href="element-definitions.html#element-dfn-contexts" title="element-dfn-contexts">Contexts in which this element can be used</a>:</dt>
1.1 mike 384: <dd>Where <a href="content-models.html#phrasing-content">phrasing content</a> is expected.</dd>
1.25 mike 385: <dt><a href="element-definitions.html#element-dfn-content-model" title="element-dfn-content-model">Content model</a>:</dt>
1.1 mike 386: <dd>Zero or more <code><a href="the-option-element.html#the-option-element">option</a></code> or <code><a href="the-optgroup-element.html#the-optgroup-element">optgroup</a></code> elements.</dd>
1.25 mike 387: <dt><a href="element-definitions.html#element-dfn-attributes" title="element-dfn-attributes">Content attributes</a>:</dt>
1.1 mike 388: <dd><a href="global-attributes.html#global-attributes">Global attributes</a></dd>
389: <dd><code title="attr-fe-autofocus"><a href="attributes-common-to-form-controls.html#attr-fe-autofocus">autofocus</a></code></dd>
390: <dd><code title="attr-fe-disabled"><a href="attributes-common-to-form-controls.html#attr-fe-disabled">disabled</a></code></dd>
391: <dd><code title="attr-fae-form"><a href="association-of-controls-and-forms.html#attr-fae-form">form</a></code></dd>
392: <dd><code title="attr-select-multiple"><a href="#attr-select-multiple">multiple</a></code></dd>
393: <dd><code title="attr-fe-name"><a href="attributes-common-to-form-controls.html#attr-fe-name">name</a></code></dd>
394: <dd><code title="attr-select-required"><a href="#attr-select-required">required</a></code></dd>
395: <dd><code title="attr-select-size"><a href="#attr-select-size">size</a></code></dd>
1.25 mike 396: <dt><a href="element-definitions.html#element-dfn-dom" title="element-dfn-dom">DOM interface</a>:</dt>
1.1 mike 397: <dd>
398: <pre class="idl">interface <dfn id="htmlselectelement">HTMLSelectElement</dfn> : <a href="elements.html#htmlelement">HTMLElement</a> {
399: attribute boolean <a href="attributes-common-to-form-controls.html#dom-fe-autofocus" title="dom-fe-autofocus">autofocus</a>;
400: attribute boolean <a href="attributes-common-to-form-controls.html#dom-fe-disabled" title="dom-fe-disabled">disabled</a>;
401: readonly attribute <a href="the-form-element.html#htmlformelement">HTMLFormElement</a>? <a href="association-of-controls-and-forms.html#dom-fae-form" title="dom-fae-form">form</a>;
402: attribute boolean <a href="#dom-select-multiple" title="dom-select-multiple">multiple</a>;
403: attribute DOMString <a href="attributes-common-to-form-controls.html#dom-fe-name" title="dom-fe-name">name</a>;
404: attribute boolean <a href="#dom-select-required" title="dom-select-required">required</a>;
405: attribute unsigned long <a href="#dom-select-size" title="dom-select-size">size</a>;
406:
407: readonly attribute DOMString <a href="#dom-select-type" title="dom-select-type">type</a>;
408:
409: readonly attribute <a href="common-dom-interfaces.html#htmloptionscollection">HTMLOptionsCollection</a> <a href="#dom-select-options" title="dom-select-options">options</a>;
410: attribute unsigned long <a href="#dom-select-length" title="dom-select-length">length</a>;
411: getter <a href="infrastructure.html#element">Element</a> <a href="#dom-select-item" title="dom-select-item">item</a>(unsigned long index);
412: object <a href="#dom-select-nameditem" title="dom-select-namedItem">namedItem</a>(DOMString name);
1.74 mike 413: void <a href="#dom-select-add" title="dom-select-add">add</a>((<a href="the-option-element.html#htmloptionelement">HTMLOptionElement</a> or <a href="the-optgroup-element.html#htmloptgroupelement">HTMLOptGroupElement</a>) element, optional (<a href="elements.html#htmlelement">HTMLElement</a> or long)? before = null);
1.1 mike 414: void <a href="#dom-select-remove" title="dom-select-remove">remove</a>(long index);
415: <a href="common-dom-interfaces.html#dom-htmloptionscollection-setter" title="dom-HTMLOptionsCollection-setter">setter creator</a> void (unsigned long index, <a href="the-option-element.html#htmloptionelement">HTMLOptionElement</a> option);
416:
417: readonly attribute <a href="infrastructure.html#htmlcollection">HTMLCollection</a> <a href="#dom-select-selectedoptions" title="dom-select-selectedOptions">selectedOptions</a>;
418: attribute long <a href="#dom-select-selectedindex" title="dom-select-selectedIndex">selectedIndex</a>;
419: attribute DOMString <a href="#dom-select-value" title="dom-select-value">value</a>;
420:
421: readonly attribute boolean <a href="constraints.html#dom-cva-willvalidate" title="dom-cva-willValidate">willValidate</a>;
422: readonly attribute <a href="constraints.html#validitystate">ValidityState</a> <a href="constraints.html#dom-cva-validity" title="dom-cva-validity">validity</a>;
423: readonly attribute DOMString <a href="constraints.html#dom-cva-validationmessage" title="dom-cva-validationMessage">validationMessage</a>;
424: boolean <a href="constraints.html#dom-cva-checkvalidatity" title="dom-cva-checkValidatity">checkValidity</a>();
425: void <a href="constraints.html#dom-cva-setcustomvalidity" title="dom-cva-setCustomValidity">setCustomValidity</a>(DOMString error);
426:
427: readonly attribute <a href="infrastructure.html#nodelist">NodeList</a> <a href="the-label-element.html#dom-lfe-labels" title="dom-lfe-labels">labels</a>;
428: };</pre>
429: </dd>
430: </dl><p>The <code><a href="#the-select-element">select</a></code> element represents a control for
1.85 mike 431: selecting amongst a set of options.</p>
432:
433: <p>The <dfn id="attr-select-multiple" title="attr-select-multiple"><code>multiple</code></dfn>
1.1 mike 434: attribute is a <a href="common-microsyntaxes.html#boolean-attribute">boolean attribute</a>. If the attribute is
435: present, then the <code><a href="#the-select-element">select</a></code> element
436: <a href="rendering.html#represents">represents</a> a control for selecting zero or more options
437: from the <a href="#concept-select-option-list" title="concept-select-option-list">list of
438: options</a>. If the attribute is absent, then the
439: <code><a href="#the-select-element">select</a></code> element <a href="rendering.html#represents">represents</a> a control for
1.85 mike 440: selecting a single option from the <a href="#concept-select-option-list" title="concept-select-option-list">list of options</a>.</p>
441:
442: <p>The <dfn id="attr-select-size" title="attr-select-size"><code>size</code></dfn>
1.1 mike 443: attribute gives the number of options to show to the user. The <code title="attr-select-size"><a href="#attr-select-size">size</a></code> attribute, if specified, must
444: have a value that is a <a href="common-microsyntaxes.html#valid-non-negative-integer">valid non-negative integer</a>
1.85 mike 445: greater than zero.</p>
446:
447: <div class="impl">
1.1 mike 448:
449: <p>The <dfn id="concept-select-size" title="concept-select-size">display size</dfn> of a
450: <code><a href="#the-select-element">select</a></code> element is the result of applying the
451: <a href="common-microsyntaxes.html#rules-for-parsing-non-negative-integers">rules for parsing non-negative integers</a> to the value of
452: element's <code title="attr-select-size"><a href="#attr-select-size">size</a></code> attribute, if
453: it has one and parsing it is successful. If applying those rules to
454: the attribute's value is not successful, or if the <code title="attr-select-size"><a href="#attr-select-size">size</a></code> attribute is absent, then the
455: element's <a href="#concept-select-size" title="concept-select-size">display size</a> is 4
456: if the element's <code title="attr-select-multiple"><a href="#attr-select-multiple">multiple</a></code>
457: content attribute is present, and 1 otherwise.</p>
458:
1.85 mike 459: </div>
460:
461: <p>The <dfn id="concept-select-option-list" title="concept-select-option-list">list of options</dfn>
1.1 mike 462: for a <code><a href="#the-select-element">select</a></code> element consists of all the
463: <code><a href="the-option-element.html#the-option-element">option</a></code> element children of the <code><a href="#the-select-element">select</a></code>
464: element, and all the <code><a href="the-option-element.html#the-option-element">option</a></code> element children of all the
465: <code><a href="the-optgroup-element.html#the-optgroup-element">optgroup</a></code> element children of the <code><a href="#the-select-element">select</a></code>
1.85 mike 466: element, in <a href="infrastructure.html#tree-order">tree order</a>.</p>
467:
468: <p>The <dfn id="attr-select-required" title="attr-select-required"><code>required</code></dfn>
1.1 mike 469: attribute is a <a href="common-microsyntaxes.html#boolean-attribute">boolean attribute</a>. When specified, the
470: user will be required to select a value before submitting the
1.85 mike 471: form.</p>
472:
473: <p>If a <code><a href="#the-select-element">select</a></code> element has a <code title="attr-select-required"><a href="#attr-select-required">required</a></code> attribute specified,
1.1 mike 474: does not have a <code title="attr-select-multiple"><a href="#attr-select-multiple">multiple</a></code>
475: attribute specified, and has a <a href="#concept-select-size" title="concept-select-size">display size</a> of 1;
476: and if the <a href="the-option-element.html#concept-option-value" title="concept-option-value">value</a> of the
477: first <code><a href="the-option-element.html#the-option-element">option</a></code> element in the <code><a href="#the-select-element">select</a></code>
478: element's <a href="#concept-select-option-list" title="concept-select-option-list">list of
479: options</a> (if any) is the empty string, and that
480: <code><a href="the-option-element.html#the-option-element">option</a></code> element's parent node is the <code><a href="#the-select-element">select</a></code>
481: element (and not an <code><a href="the-optgroup-element.html#the-optgroup-element">optgroup</a></code> element), then that
482: <code><a href="the-option-element.html#the-option-element">option</a></code> is the <code><a href="#the-select-element">select</a></code> element's
1.85 mike 483: <dfn id="placeholder-label-option">placeholder label option</dfn>.</p>
484:
485: <p>If a <code><a href="#the-select-element">select</a></code> element has a <code title="attr-select-required"><a href="#attr-select-required">required</a></code> attribute specified,
1.1 mike 486: does not have a <code title="attr-select-multiple"><a href="#attr-select-multiple">multiple</a></code>
487: attribute specified, and has a <a href="#concept-select-size" title="concept-select-size">display size</a> of 1,
488: then the <code><a href="#the-select-element">select</a></code> element must have a <a href="#placeholder-label-option">placeholder
1.85 mike 489: label option</a>.</p>
490:
491: <div class="impl">
1.1 mike 492:
493: <p><strong>Constraint validation</strong>: If the element has its
494: <code title="attr-select-required"><a href="#attr-select-required">required</a></code> attribute
495: specified, and either none of the <code><a href="the-option-element.html#the-option-element">option</a></code> elements in
496: the <code><a href="#the-select-element">select</a></code> element's <a href="#concept-select-option-list" title="concept-select-option-list">list of options</a> have their
497: <a href="the-option-element.html#concept-option-selectedness" title="concept-option-selectedness">selectedness</a> set to
498: true, or the only <code><a href="the-option-element.html#the-option-element">option</a></code> element in the
499: <code><a href="#the-select-element">select</a></code> element's <a href="#concept-select-option-list" title="concept-select-option-list">list of options</a> with its
500: <a href="the-option-element.html#concept-option-selectedness" title="concept-option-selectedness">selectedness</a> set to
501: true is the <a href="#placeholder-label-option">placeholder label option</a>, then the element
502: is <a href="constraints.html#suffering-from-being-missing">suffering from being missing</a>.</p>
503:
1.85 mike 504: </div>
505:
506: <div class="impl">
1.1 mike 507:
508: <p>If the <code title="attr-select-multiple"><a href="#attr-select-multiple">multiple</a></code>
509: attribute is absent, and the element is not <a href="attributes-common-to-form-controls.html#concept-fe-disabled" title="concept-fe-disabled">disabled</a>, then the user agent
510: should allow the user to pick an <code><a href="the-option-element.html#the-option-element">option</a></code> element in its
511: <a href="#concept-select-option-list" title="concept-select-option-list">list of options</a> that
512: is itself not <a href="the-option-element.html#concept-option-disabled" title="concept-option-disabled">disabled</a>.
513: Upon this <code><a href="the-option-element.html#the-option-element">option</a></code> element being <dfn id="concept-select-pick" title="concept-select-pick">picked</dfn> (either through a click, or
514: through unfocusing the element after changing its value, or through
515: a <a href="commands.html#using-the-option-element-to-define-a-command" title="option-command">menu command</a>, or through any
516: other mechanism), and before the relevant user interaction event
517: is queued (e.g. before the
518: <code title="event-click"><a href="infrastructure.html#event-click">click</a></code> event), the user agent must
519: set the <a href="the-option-element.html#concept-option-selectedness" title="concept-option-selectedness">selectedness</a> of the
520: picked <code><a href="the-option-element.html#the-option-element">option</a></code> element to true and then <a href="webappapis.html#queue-a-task">queue a
521: task</a> to <a href="webappapis.html#fire-a-simple-event">fire a simple event</a> that bubbles named
522: <code title="event-change">change</code> at the <code><a href="#the-select-element">select</a></code>
523: element, using the <a href="webappapis.html#user-interaction-task-source">user interaction task source</a> as the
524: task source.</p>
525:
526: <p>If the <code title="attr-select-multiple"><a href="#attr-select-multiple">multiple</a></code>
527: attribute is absent, whenever an <code><a href="the-option-element.html#the-option-element">option</a></code> element in the
528: <code><a href="#the-select-element">select</a></code> element's <a href="#concept-select-option-list" title="concept-select-option-list">list of options</a> has its
529: <a href="the-option-element.html#concept-option-selectedness" title="concept-option-selectedness">selectedness</a> set to
530: true, and whenever an <code><a href="the-option-element.html#the-option-element">option</a></code> element with its <a href="the-option-element.html#concept-option-selectedness" title="concept-option-selectedness">selectedness</a> set to true
531: is added to the <code><a href="#the-select-element">select</a></code> element's <a href="#concept-select-option-list" title="concept-select-option-list">list of options</a>, the user
532: agent must set the <a href="the-option-element.html#concept-option-selectedness" title="concept-option-selectedness">selectedness</a> of all the
533: other <code><a href="the-option-element.html#the-option-element">option</a></code> element in its <a href="#concept-select-option-list" title="concept-select-option-list">list of options</a> to
534: false.</p>
535:
536: <p>If the <code title="attr-select-multiple"><a href="#attr-select-multiple">multiple</a></code>
537: attribute is absent and the element's <a href="#concept-select-size" title="concept-select-size">display size</a> is greater than 1,
538: then the user agent should also allow the user to request that the
539: <code><a href="the-option-element.html#the-option-element">option</a></code> whose <a href="the-option-element.html#concept-option-selectedness" title="concept-option-selectedness">selectedness</a> is true, if
540: any, be unselected. Upon this request being conveyed to the user
541: agent, and before the relevant user interaction event is queued (e.g. before the <code title="event-click"><a href="infrastructure.html#event-click">click</a></code> event), the user agent must set the
542: <a href="the-option-element.html#concept-option-selectedness" title="concept-option-selectedness">selectedness</a> of
543: that <code><a href="the-option-element.html#the-option-element">option</a></code> element to false and then <a href="webappapis.html#queue-a-task">queue a
544: task</a> to <a href="webappapis.html#fire-a-simple-event">fire a simple event</a> that bubbles named
545: <code title="event-change">change</code> at the <code><a href="#the-select-element">select</a></code>
546: element, using the <a href="webappapis.html#user-interaction-task-source">user interaction task source</a> as the
547: task source.</p>
548:
549: <p>If the <code title="attr-select-multiple"><a href="#attr-select-multiple">multiple</a></code>
550: attribute is absent and the element's <a href="#concept-select-size" title="concept-select-size">display size</a> is 1, then whenever
551: there are no <code><a href="the-option-element.html#the-option-element">option</a></code> elements in the <code><a href="#the-select-element">select</a></code>
552: element's <a href="#concept-select-option-list" title="concept-select-option-list">list of
553: options</a> that have their <a href="the-option-element.html#concept-option-selectedness" title="concept-option-selectedness">selectedness</a> set to true,
554: the user agent must set the <a href="the-option-element.html#concept-option-selectedness" title="concept-option-selectedness">selectedness</a> of the first
555: <code><a href="the-option-element.html#the-option-element">option</a></code> element in the <a href="#concept-select-option-list" title="concept-select-option-list">list of options</a> in
556: <a href="infrastructure.html#tree-order">tree order</a> that is not <a href="the-option-element.html#concept-option-disabled" title="concept-option-disabled">disabled</a>, if any, to
557: true.</p>
558:
559: <p>If the <code title="attr-select-multiple"><a href="#attr-select-multiple">multiple</a></code>
560: attribute is present, and the element is not <a href="attributes-common-to-form-controls.html#concept-fe-disabled" title="concept-fe-disabled">disabled</a>, then the user agent
561: should allow the user to <dfn id="concept-select-toggle" title="concept-select-toggle">toggle</dfn> the <a href="the-option-element.html#concept-option-selectedness" title="concept-option-selectedness">selectedness</a> of the
562: <code><a href="the-option-element.html#the-option-element">option</a></code> elements in its <a href="#concept-select-option-list" title="concept-select-option-list">list of options</a> that are
563: themselves not <a href="the-option-element.html#concept-option-disabled" title="concept-option-disabled">disabled</a>
564: (either through a click, or through a <a href="commands.html#using-the-option-element-to-define-a-command" title="option-command">menu command</a>, or any other mechanism).
565: Upon the <a href="the-option-element.html#concept-option-selectedness" title="concept-option-selectedness">selectedness</a> of one or
566: more <code><a href="the-option-element.html#the-option-element">option</a></code> elements being changed by the user, and
567: before the relevant user interaction event is queued (e.g. before a related <code title="event-click"><a href="infrastructure.html#event-click">click</a></code> event), the user agent must
568: <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> that
569: bubbles named <code title="event-change">change</code> at the
570: <code><a href="#the-select-element">select</a></code> element, using the <a href="webappapis.html#user-interaction-task-source">user interaction task
571: source</a> as the task source.</p>
572:
573: <p>The <a href="form-submission.html#concept-form-reset-control" title="concept-form-reset-control">reset
574: algorithm</a> for <code><a href="#the-select-element">select</a></code> elements is to go through
575: all the <code><a href="the-option-element.html#the-option-element">option</a></code> elements in the element's <a href="#concept-select-option-list" title="concept-select-option-list">list of options</a>, and set
576: their <a href="the-option-element.html#concept-option-selectedness" title="concept-option-selectedness">selectedness</a>
577: to true if the <code><a href="the-option-element.html#the-option-element">option</a></code> element has a <code title="attr-option-selected"><a href="the-option-element.html#attr-option-selected">selected</a></code> attribute, and false
578: otherwise.</p>
579:
1.85 mike 580: </div>
581:
582: <p>The <code title="attr-fae-form"><a href="association-of-controls-and-forms.html#attr-fae-form">form</a></code> attribute is used to
1.1 mike 583: explicitly associate the <code><a href="#the-select-element">select</a></code> element with its
584: <a href="association-of-controls-and-forms.html#form-owner">form owner</a>. The <code title="attr-fe-name"><a href="attributes-common-to-form-controls.html#attr-fe-name">name</a></code>
585: attribute represents the element's name. The <code title="attr-fe-disabled"><a href="attributes-common-to-form-controls.html#attr-fe-disabled">disabled</a></code> attribute is used to make
586: the control non-interactive and to prevent its value from being
587: submitted. The <code title="attr-fe-autofocus"><a href="attributes-common-to-form-controls.html#attr-fe-autofocus">autofocus</a></code>
1.85 mike 588: attribute controls focus.</p>
589:
590:
591: <dl class="domintro"><dt><var title="">select</var> . <code title="dom-select-type"><a href="#dom-select-type">type</a></code></dt>
1.1 mike 592:
593: <dd>
594:
595: <p>Returns "<code title="">select-multiple</code>" if the element
596: has a <code title="attr-select-multiple"><a href="#attr-select-multiple">multiple</a></code>
597: attribute, and "<code title="">select-one</code>"
598: otherwise.</p>
599:
600: </dd>
601:
602: <dt><var title="">select</var> . <code title="dom-select-options"><a href="#dom-select-options">options</a></code></dt>
603:
604: <dd>
605:
606: <p>Returns an <code><a href="common-dom-interfaces.html#htmloptionscollection">HTMLOptionsCollection</a></code> of the <a href="#concept-select-option-list" title="concept-select-option-list">list of options</a>.</p>
607:
608: </dd>
609:
610: <dt><var title="">select</var> . <code title="dom-select-length"><a href="#dom-select-length">length</a></code> [ = <var title="">value</var> ]</dt>
611: <dd>
612: <p>Returns the number of elements in the <a href="#concept-select-option-list" title="concept-select-option-list">list of options</a>.</p>
613: <p>When set to a smaller number, truncates the number of <code><a href="the-option-element.html#the-option-element">option</a></code> elements in the <code><a href="#the-select-element">select</a></code>.</p>
614: <p>When set to a greater number, adds new blank <code><a href="the-option-element.html#the-option-element">option</a></code> elements to the <code><a href="#the-select-element">select</a></code>.</p>
615: </dd>
616:
617: <dt><var title="">element</var> = <var title="">select</var> . <code title="dom-select-item"><a href="#dom-select-item">item</a></code>(<var title="">index</var>)</dt>
618: <dt><var title="">select</var>[<var title="">index</var>]</dt>
619: <dd>
620: <p>Returns the item with index <var title="">index</var> from the <a href="#concept-select-option-list" title="concept-select-option-list">list of options</a>. The items are sorted in <a href="infrastructure.html#tree-order">tree order</a>.</p>
621: </dd>
622:
623: <dt><var title="">element</var> = <var title="">select</var> . <code title="dom-select-item"><a href="#dom-select-item">namedItem</a></code>(<var title="">name</var>)</dt>
624: <dd>
625: <p>Returns the item with <a href="infrastructure.html#concept-id" title="concept-id">ID</a> or <code title="attr-option-name"><a href="obsolete.html#attr-option-name">name</a></code> <var title="">name</var> from the <a href="#concept-select-option-list" title="concept-select-option-list">list of options</a>.</p>
626: <p>If there are multiple matching items, then a <code><a href="infrastructure.html#nodelist">NodeList</a></code> object containing all those elements is returned.</p>
627: <p>Returns null if no element with that <a href="infrastructure.html#concept-id" title="concept-id">ID</a> could be found.</p>
628: </dd>
629:
630: <dt><var title="">select</var> . <code title="dom-select-add"><a href="#dom-select-add">add</a></code>(<var title="">element</var> [, <var title="">before</var> ])</dt>
631: <dd>
632: <p>Inserts <var title="">element</var> before the node given by <var title="">before</var>.</p>
633: <p>The <var title="">before</var> argument can be a number, in
634: which case <var title="">element</var> is inserted before the item
635: with that number, or an element from the <a href="#concept-select-option-list" title="concept-select-option-list">list of options</a>, in
636: which case <var title="">element</var> is inserted before that
637: element.</p>
638: <p>If <var title="">before</var> is omitted, null, or a number out
639: of range, then <var title="">element</var> will be added at the
640: end of the list.</p>
641: <p>This method will throw a <code><a href="infrastructure.html#hierarchyrequesterror">HierarchyRequestError</a></code>
642: exception if <var title="">element</var> is an ancestor of the
643: element into which it is to be inserted.</p>
644: </dd>
645:
646: <dt><var title="">select</var> . <code title="dom-select-selectedOptions"><a href="#dom-select-selectedoptions">selectedOptions</a></code></dt>
647:
648: <dd>
649:
650: <p>Returns an <code><a href="infrastructure.html#htmlcollection">HTMLCollection</a></code> of the <a href="#concept-select-option-list" title="concept-select-option-list">list of options</a> that are
651: selected.</p>
652:
653: </dd>
654:
655: <dt><var title="">select</var> . <code title="dom-select-selectedIndex"><a href="#dom-select-selectedindex">selectedIndex</a></code> [ = <var title="">value</var> ]</dt>
656:
657: <dd>
658:
659: <p>Returns the index of the first selected item, if any, or
660: −1 if there is no selected item.</p>
661:
662: <p>Can be set, to change the selection.</p>
663:
664: </dd>
665:
666: <dt><var title="">select</var> . <code title="dom-select-value"><a href="#dom-select-value">value</a></code> [ = <var title="">value</var> ]</dt>
667:
668: <dd>
669:
670: <p>Returns the <a href="attributes-common-to-form-controls.html#concept-fe-value" title="concept-fe-value">value</a> of the
671: first selected item, if any, or the empty string if there is no
672: selected item.</p>
673:
674: <p>Can be set, to change the selection.</p>
675:
676: </dd>
677:
678: </dl><div class="impl">
679:
680: <p>The <dfn id="dom-select-type" title="dom-select-type"><code>type</code></dfn> IDL
681: attribute, on getting, must return the string "<code title="">select-one</code>" if the <code title="attr-select-multiple"><a href="#attr-select-multiple">multiple</a></code> attribute is absent,
682: and the string "<code title="">select-multiple</code>" if the <code title="attr-select-multiple"><a href="#attr-select-multiple">multiple</a></code> attribute is
683: present.</p>
684:
685: <p>The <dfn id="dom-select-options" title="dom-select-options"><code>options</code></dfn>
686: IDL attribute must return an <code><a href="common-dom-interfaces.html#htmloptionscollection">HTMLOptionsCollection</a></code>
687: rooted at the <code><a href="#the-select-element">select</a></code> node, whose filter matches the
688: elements in the <a href="#concept-select-option-list" title="concept-select-option-list">list of
689: options</a>.</p>
690:
691: <p>The <code title="dom-select-options"><a href="#dom-select-options">options</a></code> collection is
692: also mirrored on the <code><a href="#htmlselectelement">HTMLSelectElement</a></code> object. The
693: <a href="infrastructure.html#supported-property-indices">supported property indices</a> at any instant are the
694: indices supported by the object returned by the <code title="dom-select-options"><a href="#dom-select-options">options</a></code> attribute at that
695: instant.</p>
696:
697: <p>The <dfn id="dom-select-length" title="dom-select-length"><code>length</code></dfn> IDL
698: attribute must return the number of nodes <a href="infrastructure.html#represented-by-the-collection" title="represented
699: by the collection">represented</a> by the <code title="dom-select-options"><a href="#dom-select-options">options</a></code> collection. On setting, it
700: must act like the attribute of the same name on the <code title="dom-select-options"><a href="#dom-select-options">options</a></code> collection.</p>
701:
702: <p>The <dfn id="dom-select-item" title="dom-select-item"><code>item(<var title="">index</var>)</code></dfn> method must return the value
703: returned by the method of the same name on the <code title="dom-select-options"><a href="#dom-select-options">options</a></code> collection, when invoked
704: with the same argument.</p>
705:
706: <p>The <dfn id="dom-select-nameditem" title="dom-select-namedItem"><code>namedItem(<var title="">name</var>)</code></dfn> method must return the value
707: returned by the method of the same name on the <code title="dom-select-options"><a href="#dom-select-options">options</a></code> collection, when invoked
708: with the same argument.</p>
709:
710: <p>When the user agent is to <dfn id="dom-htmlselectelement-setter" title="dom-HTMLSelectElement-setter">set the value of a new indexed
711: property</dfn> for a given property index <var title="">index</var>
712: to a new value <var title="">value</var>, it must instead <a href="common-dom-interfaces.html#dom-htmloptionscollection-setter" title="dom-HTMLOptionsCollection-setter">set the value of a new
713: indexed property</a> with the given property index <var title="">index</var> to the new value <var title="">value</var> on the
714: <code title="dom-select-options"><a href="#dom-select-options">options</a></code> collection.</p>
715:
716: <p>Similarly, the <dfn id="dom-select-add" title="dom-select-add"><code>add()</code></dfn> and <dfn id="dom-select-remove" title="dom-select-remove"><code>remove()</code></dfn> methods must
717: act like their namesake methods on that same <code title="dom-select-options"><a href="#dom-select-options">options</a></code> collection.</p>
718:
719: <p>The <dfn id="dom-select-selectedoptions" title="dom-select-selectedOptions"><code>selectedOptions</code></dfn>
720: IDL attribute must return an <code><a href="infrastructure.html#htmlcollection">HTMLCollection</a></code> rooted at
721: the <code><a href="#the-select-element">select</a></code> node, whose filter matches the elements in
722: the <a href="#concept-select-option-list" title="concept-select-option-list">list of options</a>
723: that have their <a href="the-option-element.html#concept-option-selectedness" title="concept-option-selectedness">selectedness</a> set to
724: true.</p>
725:
726: <p>The <dfn id="dom-select-selectedindex" title="dom-select-selectedIndex"><code>selectedIndex</code></dfn>
727: IDL attribute, on getting, must return the <a href="the-option-element.html#concept-option-index" title="concept-option-index">index</a> of the first
728: <code><a href="the-option-element.html#the-option-element">option</a></code> element in the <a href="#concept-select-option-list" title="concept-select-option-list">list of options</a> in
729: <a href="infrastructure.html#tree-order">tree order</a> that has its <a href="the-option-element.html#concept-option-selectedness" title="concept-option-selectedness">selectedness</a> set to true,
730: if any. If there isn't one, then it must return −1.</p>
731:
732: <p>On setting, the <code title="dom-select-selectedIndex"><a href="#dom-select-selectedindex">selectedIndex</a></code> attribute must
733: set the <a href="the-option-element.html#concept-option-selectedness" title="concept-option-selectedness">selectedness</a> of all the
734: <code><a href="the-option-element.html#the-option-element">option</a></code> elements in the <a href="#concept-select-option-list" title="concept-select-option-list">list of options</a> to false,
735: and then the <code><a href="the-option-element.html#the-option-element">option</a></code> element in the <a href="#concept-select-option-list" title="concept-select-option-list">list of options</a> whose
736: <a href="the-option-element.html#concept-option-index" title="concept-option-index">index</a> is the given new
737: value, if any, must have its <a href="the-option-element.html#concept-option-selectedness" title="concept-option-selectedness">selectedness</a> set to
738: true.</p>
739:
740: <p>The <dfn id="dom-select-value" title="dom-select-value"><code>value</code></dfn> IDL
741: attribute, on getting, must return the <a href="the-option-element.html#concept-option-value" title="concept-option-value">value</a> of the first
742: <code><a href="the-option-element.html#the-option-element">option</a></code> element in the <a href="#concept-select-option-list" title="concept-select-option-list">list of options</a> in
743: <a href="infrastructure.html#tree-order">tree order</a> that has its <a href="the-option-element.html#concept-option-selectedness" title="concept-option-selectedness">selectedness</a> set to true,
744: if any. If there isn't one, then it must return the empty
745: string.</p>
746:
747: <p>On setting, the <code title="dom-select-value"><a href="#dom-select-value">value</a></code>
748: attribute must set the <a href="the-option-element.html#concept-option-selectedness" title="concept-option-selectedness">selectedness</a> of all the
749: <code><a href="the-option-element.html#the-option-element">option</a></code> elements in the <a href="#concept-select-option-list" title="concept-select-option-list">list of options</a> to false,
750: and then the first <code><a href="the-option-element.html#the-option-element">option</a></code> element in the <a href="#concept-select-option-list" title="concept-select-option-list">list of options</a>, in
751: <a href="infrastructure.html#tree-order">tree order</a>, whose <a href="the-option-element.html#concept-option-value" title="concept-option-value">value</a> is equal to the given new
752: value, if any, must have its <a href="the-option-element.html#concept-option-selectedness" title="concept-option-selectedness">selectedness</a> set to
753: true.</p>
754:
755: <p>The <dfn id="dom-select-multiple" title="dom-select-multiple"><code>multiple</code></dfn>,
756: <dfn id="dom-select-required" title="dom-select-required"><code>required</code></dfn>, and
757: <dfn id="dom-select-size" title="dom-select-size"><code>size</code></dfn> IDL attributes
758: must <a href="common-dom-interfaces.html#reflect">reflect</a> the respective content attributes of the
759: same name. The <code title="dom-select-size"><a href="#dom-select-size">size</a></code> IDL
760: attribute has a default value of zero.</p>
1.4 mike 761:
1.1 mike 762: <p class="note">For historical reasons, the default value of the
763: <code title="dom-select-size"><a href="#dom-select-size">size</a></code> IDL attribute does not
764: return the actual size used, which, in the absence of the <code title="attr-select-size"><a href="#attr-select-size">size</a></code> content attribute, is either 1
765: or 4 depending on the presence of the <code title="attr-select-multiple"><a href="#attr-select-multiple">multiple</a></code> attribute.</p>
766:
767: <p>The <code title="dom-cva-willValidate"><a href="constraints.html#dom-cva-willvalidate">willValidate</a></code>, <code title="dom-cva-validity"><a href="constraints.html#dom-cva-validity">validity</a></code>, and <code title="dom-cva-validationMessage"><a href="constraints.html#dom-cva-validationmessage">validationMessage</a></code>
768: attributes, and the <code title="dom-cva-checkValidatity"><a href="constraints.html#dom-cva-checkvalidatity">checkValidity()</a></code> and <code title="dom-cva-setCustomValidity"><a href="constraints.html#dom-cva-setcustomvalidity">setCustomValidity()</a></code>
769: methods, are part of the <a href="constraints.html#the-constraint-validation-api">constraint validation API</a>. The
770: <code title="dom-lfe-labels"><a href="the-label-element.html#dom-lfe-labels">labels</a></code> attribute provides a list
771: of the element's <code><a href="the-label-element.html#the-label-element">label</a></code>s. The <code title="dom-fe-autofocus"><a href="attributes-common-to-form-controls.html#dom-fe-autofocus">autofocus</a></code>, <code title="dom-fe-disabled"><a href="attributes-common-to-form-controls.html#dom-fe-disabled">disabled</a></code>, <code title="dom-fae-form"><a href="association-of-controls-and-forms.html#dom-fae-form">form</a></code>, and <code title="dom-fe-name"><a href="attributes-common-to-form-controls.html#dom-fe-name">name</a></code> IDL attributes are part of the
772: element's forms API.</p>
773:
1.85 mike 774: </div>
775:
776:
777: <div class="example">
1.1 mike 778:
779: <p>The following example shows how a <code><a href="#the-select-element">select</a></code> element
780: can be used to offer the user with a set of options from which the
781: user can select a single option. The default option is
782: preselected.</p>
783:
784: <pre><p>
785: <label for="unittype">Select unit type:</label>
786: <select id="unittype" name="unittype">
787: <option value="1"> Miner </option>
788: <option value="2"> Puffer </option>
789: <option value="3" selected> Snipey </option>
790: <option value="4"> Max </option>
791: <option value="5"> Firebot </option>
792: </select>
793: </p></pre>
794:
795: <p>When there is no default option, a placeholder can be used
796: instead:</p>
797:
798: <pre><select name="unittype" <strong>required</strong>>
799: <strong><option value=""> Select unit type </option></strong>
800: <option value="1"> Miner </option>
801: <option value="2"> Puffer </option>
802: <option value="3"> Snipey </option>
803: <option value="4"> Max </option>
804: <option value="5"> Firebot </option>
805: </select></pre>
806:
1.85 mike 807: </div>
808:
809: <div class="example">
1.1 mike 810:
811: <p>Here, the user is offered a set of options from which he can
812: select any number. By default, all five options are selected.</p>
813:
814: <pre><p>
815: <label for="allowedunits">Select unit types to enable on this map:</label>
816: <select id="allowedunits" name="allowedunits" multiple>
817: <option value="1" selected> Miner </option>
818: <option value="2" selected> Puffer </option>
819: <option value="3" selected> Snipey </option>
820: <option value="4" selected> Max </option>
821: <option value="5" selected> Firebot </option>
822: </select>
823: </p></pre>
824:
1.85 mike 825: </div>
826:
827: <div class="example">
1.1 mike 828:
829: <p>Sometimes, a user has to select one or more items. This example
830: shows such an interface.</p>
831:
832: <pre><p>Select the songs from that you would like on your Act II Mix Tape:</p>
833: <select multiple required name="act2">
834: <option value="s1">It Sucks to Be Me (Reprise)
835: <option value="s2">There is Life Outside Your Apartment
836: <option value="s3">The More You Ruv Someone
837: <option value="s4">Schadenfreude
838: <option value="s5">I Wish I Could Go Back to College
839: <option value="s6">The Money Song
840: <option value="s7">School for Monsters
841: <option value="s8">The Money Song (Reprise)
842: <option value="s9">There's a Fine, Fine Line (Reprise)
843: <option value="s10">What Do You Do With a B.A. in English? (Reprise)
844: <option value="s11">For Now
845: </select></pre>
846:
1.85 mike 847: </div>
848:
849:
850:
851: </body></html>
Webmaster
![[BACK]](/https/dev.w3.org/cvsweb/icons/back.gif){kind=icon}
Return to the-select-element.html CVS log ![[TXT]](/https/dev.w3.org/cvsweb/icons/text.gif){kind=icon}
![[DIR]](/https/dev.w3.org/cvsweb/icons/dir.gif){kind=icon}
Up to [Public] / html5 / spec