Annotation of html5/spec-author-view/the-button-element.html, revision 1.11
1.1 mike 1: <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01//EN">
2: <!DOCTYPE html>
1.5 mike 3: <!-- when publishing, change bits marked ZZZ --><html lang="en-US-x-Hixie" class="split chapter"><head><title>4.10.6 The button element — HTML5 (Author Edition)</title><script src="link-fixup.js"></script><link href="whatwg.css" rel="stylesheet"><style type="text/css">
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53: dl.switch { padding-left: 2em; }
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63:
64: h2 { page-break-before: always; }
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172: #configUI p label { display: block; }
173: #configUI #updateUI, #configUI .loginUI { text-align: center; }
174: #configUI input[type=button] { display: block; margin: auto; }
175: </style><style type="text/css">
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206:
207: .apple-table-examples { border: none; border-collapse: separate; border-spacing: 1.5em 0em; width: 40em; margin-left: 3em; }
208: .apple-table-examples * { font-family: "Times", serif; }
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210: .apple-table-examples tbody th:first-child { border-left: none; width: 100%; }
211: .apple-table-examples thead th:first-child ~ th { font-size: smaller; font-weight: bolder; border-bottom: solid 2px; text-align: center; }
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214: .apple-table-examples td { text-align: right; vertical-align: top; }
215: .apple-table-examples.e1 tbody tr:last-child td { border-bottom: solid 1px; }
1.9 mike 216: .apple-table-examples.e1 tbody + tbody tr:last-child td { border-bottom: double 3px; }
217: .apple-table-examples.e2 th[scope=row] { padding-left: 1em; }
218: .apple-table-examples sup { line-height: 0; }
219:
1.11 ! mike 220: .details-example img { vertical-align: top; }
! 221:
! 222: </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" id="author" rel="alternate stylesheet" title="Author documentation only"><link href="data:text/css,.impl%20%7B%20background:%20%23FFEEEE;%20%7D" id="highlight" rel="alternate stylesheet" title="Highlight implementation requirements"><script type="text/javascript">
1.9 mike 223: function getCookie(name) {
224: var params = location.search.substr(1).split("&");
225: for (var index = 0; index < params.length; index++) {
226: if (params[index] == name)
227: return "1";
228: var data = params[index].split("=");
229: if (data[0] == name)
230: return unescape(data[1]);
231: }
232: var cookies = document.cookie.split("; ");
233: for (var index = 0; index < cookies.length; index++) {
234: var data = cookies[index].split("=");
235: if (data[0] == name)
236: return unescape(data[1]);
237: }
238: return null;
239: }
240: function load(script) {
241: var e = document.createElement('script');
242: e.setAttribute('src', 'http://www.whatwg.org/specs/web-apps/current-work/' + script + '?' + encodeURIComponent(location) + '&' + encodeURIComponent(document.referrer));
243: document.body.appendChild(e);
244: }
245: function init() {
246: if (location.search == '?slow-browser')
247: return;
248: var configUI = document.createElement('div');
249: configUI.id = 'configUI';
250: document.body.appendChild(configUI);
251: // load('reviewer.js'); // would need cross-site XHR
252: if (document.getElementById('head'))
253: load('toc.js');
254:
255: // load('updater.js'); // would need cross-site XHR
1.11 ! mike 256: load('dfn.js'); // doesn't support split-out specs, but, oh well.
1.9 mike 257: // load('status.js'); // would need cross-site XHR
258: if (getCookie('profile') == '1')
259: document.getElementsByTagName('h2')[0].textContent += '; load: ' + (new Date() - loadTimer) + 'ms';
260: fixBrokenLink();
261: }
262: </script><link href="http://www.w3.org/StyleSheets/TR/W3C-ED" rel="stylesheet" type="text/css"><link href="common-input-element-attributes.html" title="4.10.5.2 Common input element attributes" rel="prev">
263: <link href="Overview.html#contents" title="Table of contents" rel="index">
1.11 ! mike 264: <link href="association-of-controls-and-forms.html" title="4.10.16 Association of controls and forms" rel="next">
1.9 mike 265: </head><body onload="fixBrokenLink(); init()"><div class="head" id="head">
266: <p><a href="http://www.w3.org/"><img alt="W3C" height="48" src="http://www.w3.org/Icons/w3c_home" width="72"></a></p>
267: <h1>HTML5 (Author Edition)</h1>
268: </div><div>
269: <a href="common-input-element-attributes.html">← 4.10.5.2 Common input element attributes</a> –
270: <a href="Overview.html#contents">Table of contents</a> –
1.11 ! mike 271: <a href="association-of-controls-and-forms.html">4.10.16 Association of controls and forms →</a>
! 272: <ol class="toc"><li><ol><li><ol><li><a href="the-button-element.html#the-button-element"><span class="secno">4.10.6 </span>The <code>button</code> element</a></li><li><a href="the-button-element.html#the-select-element"><span class="secno">4.10.7 </span>The <code>select</code> element</a></li><li><a href="the-button-element.html#the-datalist-element"><span class="secno">4.10.8 </span>The <code>datalist</code> element</a></li><li><a href="the-button-element.html#the-optgroup-element"><span class="secno">4.10.9 </span>The <code>optgroup</code> element</a></li><li><a href="the-button-element.html#the-option-element"><span class="secno">4.10.10 </span>The <code>option</code> element</a></li><li><a href="the-button-element.html#the-textarea-element"><span class="secno">4.10.11 </span>The <code>textarea</code> element</a></li><li><a href="the-button-element.html#the-keygen-element"><span class="secno">4.10.12 </span>The <code>keygen</code> element</a></li><li><a href="the-button-element.html#the-output-element"><span class="secno">4.10.13 </span>The <code>output</code> element</a></li><li><a href="the-button-element.html#the-progress-element"><span class="secno">4.10.14 </span>The <code>progress</code> element</a></li><li><a href="the-button-element.html#the-meter-element"><span class="secno">4.10.15 </span>The <code>meter</code> element</a></li></ol></li></ol></li></ol></div>
1.9 mike 273:
274: <h4 id="the-button-element"><span class="secno">4.10.6 </span>The <dfn><code>button</code></dfn> element</h4><p class="XXX annotation"><b>Status: </b><i>Last call for comments</i></p><dl class="element"><dt>Categories</dt>
275: <dd><a href="content-models.html#flow-content">Flow content</a>.</dd>
276: <dd><a href="content-models.html#phrasing-content">Phrasing content</a>.</dd>
277: <dd><a href="content-models.html#interactive-content">Interactive content</a>.</dd>
278: <dd><a href="forms.html#category-listed" title="category-listed">Listed</a>, <a href="forms.html#category-label" title="category-label">labelable</a>, and <a href="forms.html#category-submit" title="category-submit">submittable</a> <a href="forms.html#form-associated-element">form-associated element</a>.</dd>
279: <dt>Contexts in which this element may be used:</dt>
280: <dd>Where <a href="content-models.html#phrasing-content">phrasing content</a> is expected.</dd>
281: <dt>Content model:</dt>
282: <dd><a href="content-models.html#phrasing-content">Phrasing content</a>, but there must be no <a href="content-models.html#interactive-content">interactive content</a> descendant.</dd>
283: <dt>Content attributes:</dt>
284: <dd><a href="elements.html#global-attributes">Global attributes</a></dd>
285: <dd><code title="attr-fe-autofocus"><a href="association-of-controls-and-forms.html#attr-fe-autofocus">autofocus</a></code></dd>
286: <dd><code title="attr-fe-disabled"><a href="association-of-controls-and-forms.html#attr-fe-disabled">disabled</a></code></dd>
287: <dd><code title="attr-fae-form"><a href="association-of-controls-and-forms.html#attr-fae-form">form</a></code></dd>
288: <dd><code title="attr-fs-formaction"><a href="association-of-controls-and-forms.html#attr-fs-formaction">formaction</a></code></dd>
289: <dd><code title="attr-fs-formenctype"><a href="association-of-controls-and-forms.html#attr-fs-formenctype">formenctype</a></code></dd>
290: <dd><code title="attr-fs-formmethod"><a href="association-of-controls-and-forms.html#attr-fs-formmethod">formmethod</a></code></dd>
291: <dd><code title="attr-fs-formnovalidate"><a href="association-of-controls-and-forms.html#attr-fs-formnovalidate">formnovalidate</a></code></dd>
292: <dd><code title="attr-fs-formtarget"><a href="association-of-controls-and-forms.html#attr-fs-formtarget">formtarget</a></code></dd>
293: <dd><code title="attr-fe-name"><a href="association-of-controls-and-forms.html#attr-fe-name">name</a></code></dd>
294: <dd><code title="attr-button-type"><a href="#attr-button-type">type</a></code></dd>
295: <dd><code title="attr-button-value"><a href="#attr-button-value">value</a></code></dd>
296: <dt>DOM interface:</dt>
297: <dd>
298: <pre class="idl">interface <dfn id="htmlbuttonelement">HTMLButtonElement</dfn> : <a href="elements.html#htmlelement">HTMLElement</a> {
299: attribute boolean <a href="#dom-fe-autofocus" title="dom-fe-autofocus">autofocus</a>;
300: attribute boolean <a href="#dom-fe-disabled" title="dom-fe-disabled">disabled</a>;
301: readonly attribute <a href="forms.html#htmlformelement">HTMLFormElement</a> <a href="#dom-fae-form" title="dom-fae-form">form</a>;
302: attribute DOMString <a href="#dom-fs-formaction" title="dom-fs-formAction">formAction</a>;
303: attribute DOMString <a href="#dom-fs-formenctype" title="dom-fs-formEnctype">formEnctype</a>;
304: attribute DOMString <a href="#dom-fs-formmethod" title="dom-fs-formMethod">formMethod</a>;
305: attribute DOMString <a href="#dom-fs-formnovalidate" title="dom-fs-formNoValidate">formNoValidate</a>;
306: attribute DOMString <a href="#dom-fs-formtarget" title="dom-fs-formTarget">formTarget</a>;
307: attribute DOMString <a href="#dom-fe-name" title="dom-fe-name">name</a>;
308: attribute DOMString <a href="#dom-button-type" title="dom-button-type">type</a>;
309: attribute DOMString <a href="#dom-button-value" title="dom-button-value">value</a>;
310:
311: readonly attribute boolean <a href="#dom-cva-willvalidate" title="dom-cva-willValidate">willValidate</a>;
312: readonly attribute <a href="#validitystate">ValidityState</a> <a href="#dom-cva-validity" title="dom-cva-validity">validity</a>;
313: readonly attribute DOMString <a href="#dom-cva-validationmessage" title="dom-cva-validationMessage">validationMessage</a>;
314: boolean <a href="#dom-cva-checkvalidatity" title="dom-cva-checkValidatity">checkValidity</a>();
315: void <a href="#dom-cva-setcustomvalidity" title="dom-cva-setCustomValidity">setCustomValidity</a>(in DOMString error);
316:
317: readonly attribute <span>NodeList</span> <a href="#dom-lfe-labels" title="dom-lfe-labels">labels</a>;
318: };</pre>
319: </dd>
320: </dl><p>The <code><a href="#the-button-element">button</a></code> element <a href="#represents">represents</a> a
321: button. </p><p>The element is a <a href="forms.html#concept-button" title="concept-button">button</a>.</p><p>The <dfn id="attr-button-type" title="attr-button-type"><code>type</code></dfn>
322: attribute controls the behavior of the button when it is activated.
323: It is an <a href="common-microsyntaxes.html#enumerated-attribute">enumerated attribute</a>. The following table
324: lists the keywords and states for the attribute — the keywords
325: in the left column map to the states in the cell in the second
326: column on the same row as the keyword.</p><table><thead><tr><th> Keyword
327: </th><th> State
328: </th><th> Brief description
329: </th></tr></thead><tbody><tr><td><dfn id="attr-button-type-submit" title="attr-button-type-submit"><code>submit</code></dfn>
330: </td><td><a href="#attr-button-type-submit-state" title="attr-button-type-submit-state">Submit Button</a>
331: </td><td>Submits the form.
332: </td></tr><tr><td><dfn id="attr-button-type-reset" title="attr-button-type-reset"><code>reset</code></dfn>
333: </td><td><a href="#attr-button-type-reset-state" title="attr-button-type-reset-state">Reset Button</a>
334: </td><td>Resets the form.
335: </td></tr><tr><td><dfn id="attr-button-type-button" title="attr-button-type-button"><code>button</code></dfn>
336: </td><td><a href="#attr-button-type-button-state" title="attr-button-type-button-state">Button</a>
337: </td><td>Does nothing.
338: </td></tr></tbody></table><p>The <i>missing value default</i> is the <a href="#attr-button-type-submit-state" title="attr-button-type-submit-state">Submit Button</a>
339: state.</p><p>If the <code title="attr-button-type"><a href="#attr-button-type">type</a></code> attribute is in
340: the <a href="#attr-button-type-submit-state" title="attr-button-type-submit-state">Submit Button</a>
341: state, the element is specifically a <a href="forms.html#concept-submit-button" title="concept-submit-button">submit button</a>.</p><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
342: explicitly associate the <code><a href="#the-button-element">button</a></code> element with its
343: <a href="association-of-controls-and-forms.html#form-owner">form owner</a>. The <code title="attr-fe-name"><a href="association-of-controls-and-forms.html#attr-fe-name">name</a></code>
344: attribute represents the element's name. The <code title="attr-fe-disabled"><a href="association-of-controls-and-forms.html#attr-fe-disabled">disabled</a></code> attribute is used to make
345: the control non-interactive and to prevent its value from being
346: submitted. The <code title="attr-fe-autofocus"><a href="association-of-controls-and-forms.html#attr-fe-autofocus">autofocus</a></code>
347: attribute controls focus. 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
348: <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
349: be used to make submit buttons that do not trigger the constraint
350: validation.</p><p>The <dfn id="attr-button-value" title="attr-button-value"><code>value</code></dfn>
351: attribute gives the element's value for the purposes of form
1.10 mike 352: submission. The element's <a href="#concept-fe-value" title="concept-fe-value">value</a> is the value of the element's
353: <code title="attr-button-value"><a href="#attr-button-value">value</a></code> attribute, if there is
354: one, or the empty string otherwise.</p><p class="note">A button (and its value) is only included in the
1.9 mike 355: form submission if the button itself was used to initiate the form
356: submission.</p><div class="example">
357:
358: <p>The following button is labeled "Show hint" and pops up a dialog
359: box when activated:</p>
360:
361: <pre><button type=button
362: onclick="alert('This 15-20 minute piece was composed by George Gershwin.')">
363: Show hint
364: </button></pre>
365:
366: </div><h4 id="the-select-element"><span class="secno">4.10.7 </span>The <dfn><code>select</code></dfn> element</h4><p class="XXX annotation"><b>Status: </b><i>Last call for comments</i></p><dl class="element"><dt>Categories</dt>
367: <dd><a href="content-models.html#flow-content">Flow content</a>.</dd>
368: <dd><a href="content-models.html#phrasing-content">Phrasing content</a>.</dd>
369: <dd><a href="content-models.html#interactive-content">Interactive content</a>.</dd>
370: <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>
371: <dt>Contexts in which this element may be used:</dt>
372: <dd>Where <a href="content-models.html#phrasing-content">phrasing content</a> is expected.</dd>
373: <dt>Content model:</dt>
374: <dd>Zero or more <code><a href="#the-option-element">option</a></code> or <code><a href="#the-optgroup-element">optgroup</a></code> elements.</dd>
375: <dt>Content attributes:</dt>
376: <dd><a href="elements.html#global-attributes">Global attributes</a></dd>
377: <dd><code title="attr-fe-autofocus"><a href="association-of-controls-and-forms.html#attr-fe-autofocus">autofocus</a></code></dd>
378: <dd><code title="attr-fe-disabled"><a href="association-of-controls-and-forms.html#attr-fe-disabled">disabled</a></code></dd>
379: <dd><code title="attr-fae-form"><a href="association-of-controls-and-forms.html#attr-fae-form">form</a></code></dd>
380: <dd><code title="attr-select-multiple"><a href="#attr-select-multiple">multiple</a></code></dd>
381: <dd><code title="attr-fe-name"><a href="association-of-controls-and-forms.html#attr-fe-name">name</a></code></dd>
382: <dd><code title="attr-select-size"><a href="#attr-select-size">size</a></code></dd>
383: <dt>DOM interface:</dt>
384: <dd>
385: <pre class="idl">interface <dfn id="htmlselectelement">HTMLSelectElement</dfn> : <a href="elements.html#htmlelement">HTMLElement</a> {
386: attribute boolean <a href="#dom-fe-autofocus" title="dom-fe-autofocus">autofocus</a>;
387: attribute boolean <a href="#dom-fe-disabled" title="dom-fe-disabled">disabled</a>;
388: readonly attribute <a href="forms.html#htmlformelement">HTMLFormElement</a> <a href="#dom-fae-form" title="dom-fae-form">form</a>;
389: attribute boolean <a href="#dom-select-multiple" title="dom-select-multiple">multiple</a>;
390: attribute DOMString <a href="#dom-fe-name" title="dom-fe-name">name</a>;
391: attribute unsigned long <a href="#dom-select-size" title="dom-select-size">size</a>;
392:
393: readonly attribute DOMString <a href="#dom-select-type" title="dom-select-type">type</a>;
394:
395: readonly attribute <a href="urls.html#htmloptionscollection">HTMLOptionsCollection</a> <a href="#dom-select-options" title="dom-select-options">options</a>;
396: attribute unsigned long <a href="#dom-select-length" title="dom-select-length">length</a>;
397: caller getter any <a href="#dom-select-item" title="dom-select-item">item</a>(in unsigned long index);
398: caller getter any <a href="#dom-select-nameditem" title="dom-select-namedItem">namedItem</a>(in DOMString name);
399: void <a href="#dom-select-add" title="dom-select-add">add</a>(in <a href="elements.html#htmlelement">HTMLElement</a> element, in optional <a href="elements.html#htmlelement">HTMLElement</a> before);
400: void <a href="#dom-select-add" title="dom-select-add">add</a>(in <a href="elements.html#htmlelement">HTMLElement</a> element, in long before);
401: void <a href="#dom-select-remove" title="dom-select-remove">remove</a>(in long index);
402:
403: readonly attribute <a href="urls.html#htmlcollection">HTMLCollection</a> <a href="#dom-select-selectedoptions" title="dom-select-selectedOptions">selectedOptions</a>;
404: attribute long <a href="#dom-select-selectedindex" title="dom-select-selectedIndex">selectedIndex</a>;
405: attribute DOMString <a href="#dom-select-value" title="dom-select-value">value</a>;
406:
407: readonly attribute boolean <a href="#dom-cva-willvalidate" title="dom-cva-willValidate">willValidate</a>;
408: readonly attribute <a href="#validitystate">ValidityState</a> <a href="#dom-cva-validity" title="dom-cva-validity">validity</a>;
409: readonly attribute DOMString <a href="#dom-cva-validationmessage" title="dom-cva-validationMessage">validationMessage</a>;
410: boolean <a href="#dom-cva-checkvalidatity" title="dom-cva-checkValidatity">checkValidity</a>();
411: void <a href="#dom-cva-setcustomvalidity" title="dom-cva-setCustomValidity">setCustomValidity</a>(in DOMString error);
412:
413: readonly attribute <span>NodeList</span> <a href="#dom-lfe-labels" title="dom-lfe-labels">labels</a>;
414: };</pre>
415: </dd>
416: </dl><!-- Proposals for v2:
417: * <select value=""> as an alternative to <option selected>
418: http://developers.slashdot.org/comments.pl?sid=426306&cid=22142072
1.11 ! mike 419: <Philip`> http://www.ipiao.com.cn/ does <select size="1" name="to"><script type="text/javascript">City_Default="PEK"</script><SCRIPT language=javascript
1.9 mike 420: src="/js/flightcity.js"></SCRIPT></select> which is the kind of thing that could be much simpler with <select value="PEK">
421: * a way to make the <select> not have a default value at all (ack
422: or to have a "placeholer" like value that doesn't count as a value being selected but shows a prompt until a value is selected
423: * once we can have no default, a way to require="" a value.
424: ack Weston Ruter: http://weston.ruter.net/projects/test-cases/html-select-element/
425: q.v. http://lists.whatwg.org/pipermail/whatwg-whatwg.org/2008-November/017583.html
426: --><p>The <code><a href="#the-select-element">select</a></code> element represents a control for
427: selecting amongst a set of options.</p><p>The <dfn id="attr-select-multiple" title="attr-select-multiple"><code>multiple</code></dfn>
428: attribute is a <a href="common-microsyntaxes.html#boolean-attribute">boolean attribute</a>. If the attribute is
429: present, then the <code><a href="#the-select-element">select</a></code> element
430: <a href="#represents">represents</a> a control for selecting zero or more options
431: from the <a href="#concept-select-option-list" title="concept-select-option-list">list of
432: options</a>. If the attribute is absent, then the
433: <code><a href="#the-select-element">select</a></code> element <a href="#represents">represents</a> a control for
434: selecting a single option from the <a href="#concept-select-option-list" title="concept-select-option-list">list of options</a>.</p><p>The <dfn id="concept-select-option-list" title="concept-select-option-list">list of options</dfn>
435: for a <code><a href="#the-select-element">select</a></code> element consists of all the
436: <code><a href="#the-option-element">option</a></code> element children of the <code><a href="#the-select-element">select</a></code>
437: element, and all the <code><a href="#the-option-element">option</a></code> element children of all the
438: <code><a href="#the-optgroup-element">optgroup</a></code> element children of the <code><a href="#the-select-element">select</a></code>
439: element, in <a href="infrastructure.html#tree-order">tree order</a>.</p><p>The <dfn id="attr-select-size" title="attr-select-size"><code>size</code></dfn>
440: attribute gives the number of options to show to the user. The <code title="attr-input-size"><a href="common-input-element-attributes.html#attr-input-size">size</a></code> attribute, if specified, must
441: have a value that is a <a href="common-microsyntaxes.html#valid-non-negative-integer">valid non-negative integer</a>
442: greater than zero. If the <code title="attr-select-multiple"><a href="#attr-select-multiple">multiple</a></code> attribute is present,
443: then the <code title="attr-input-size"><a href="common-input-element-attributes.html#attr-input-size">size</a></code> attribute's
444: default value is 4. If the <code title="attr-select-multiple"><a href="#attr-select-multiple">multiple</a></code> attribute is absent,
445: then the <code title="attr-input-size"><a href="common-input-element-attributes.html#attr-input-size">size</a></code> attribute's
446: default value is 1.</p><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
447: explicitly associate the <code><a href="#the-select-element">select</a></code> element with its
448: <a href="association-of-controls-and-forms.html#form-owner">form owner</a>. The <code title="attr-fe-name"><a href="association-of-controls-and-forms.html#attr-fe-name">name</a></code>
449: attribute represents the element's name. The <code title="attr-fe-disabled"><a href="association-of-controls-and-forms.html#attr-fe-disabled">disabled</a></code> attribute is used to make
450: the control non-interactive and to prevent its value from being
451: submitted. The <code title="attr-fe-autofocus"><a href="association-of-controls-and-forms.html#attr-fe-autofocus">autofocus</a></code>
452: attribute controls focus.</p><dl class="domintro"><dt><var title="">select</var> . <code title="dom-select-type"><a href="#dom-select-type">type</a></code></dt>
453:
454: <dd>
455:
456: <p>Returns "<code title="">select-multiple</code>" if the element
457: has a <code title="attr-select-multiple"><a href="#attr-select-multiple">multiple</a></code>
458: attribute, and "<code title="">select-one</code>"
459: otherwise.</p>
460:
461: </dd>
462:
463: <dt><var title="">select</var> . <code title="dom-select-options"><a href="#dom-select-options">options</a></code></dt>
464:
465: <dd>
466:
467: <p>Returns an <code><a href="urls.html#htmloptionscollection">HTMLOptionsCollection</a></code> of the <a href="#concept-select-option-list" title="concept-select-option-list">list of options</a>.</p>
468:
469: </dd>
470:
471: <dt><var title="">select</var> . <code title="dom-select-length"><a href="#dom-select-length">length</a></code> [ = <var title="">value</var> ]</dt>
472: <dd>
473: <p>Returns the number of elements in the <a href="#concept-select-option-list" title="concept-select-option-list">list of options</a>.</p>
474: <p>When set to a smaller number, truncates the number of <code><a href="#the-option-element">option</a></code> elements in the <code><a href="#the-select-element">select</a></code>.</p>
475: <p>When set to a greater number, adds new blank <code><a href="#the-option-element">option</a></code> elements to the <code><a href="#the-select-element">select</a></code>.</p>
476: </dd>
477:
478: <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>
479: <dt><var title="">select</var>[<var title="">index</var>]</dt>
480: <dt><var title="">select</var>(<var title="">index</var>)</dt>
481: <dd>
482: <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>
483: <p>Returns null if <var title="">index</var> is out of range.</p>
484: </dd>
485:
486: <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>
487: <dt><var title="">select</var>[<var title="">name</var>]</dt>
488: <dt><var title="">select</var>(<var title="">name</var>)</dt>
489: <dd>
490: <p>Returns the item with ID or <code title="attr-option-name">name</code> <var title="">name</var> from the <a href="#concept-select-option-list" title="concept-select-option-list">list of options</a>.</p>
491: <p>If there are multiple matching items, then a <code>NodeList</code> object containing all those elements is returned.</p>
492: <p>Returns null if no element with that ID could be found.</p>
493: </dd>
494:
495: <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>
496: <dd>
497: <p>Inserts <var title="">element</var> before the node given by <var title="">before</var>.</p>
498: <p>The <var title="">before</var> argument can be a number, in
499: which case <var title="">element</var> is inserted before the item
500: with that number, or an element from the <a href="#concept-select-option-list" title="concept-select-option-list">list of options</a>, in
501: which case <var title="">element</var> is inserted before that
502: element.</p>
503: <p>If <var title="">before</var> is omitted, null, or a number out
504: of range, then <var title="">element</var> will be added at the
505: end of the list.</p>
506: <p>This method will throw a <code><a href="urls.html#hierarchy_request_err">HIERARCHY_REQUEST_ERR</a></code>
507: exception if <var title="">element</var> is an ancestor of the
508: element into which it is to be inserted. If <var title="">element</var> is not an <code><a href="#the-option-element">option</a></code> or
509: <code><a href="#the-optgroup-element">optgroup</a></code> element, then the method does nothing.</p>
510: </dd>
511:
512: <dt><var title="">select</var> . <code title="dom-select-selectedOptions"><a href="#dom-select-selectedoptions">selectedOptions</a></code></dt>
513:
514: <dd>
515:
516: <p>Returns an <code><a href="urls.html#htmlcollection">HTMLCollection</a></code> of the <a href="#concept-select-option-list" title="concept-select-option-list">list of options</a> that are
517: selected.</p>
518:
519: </dd>
520:
521: <dt><var title="">select</var> . <code title="dom-select-selectedIndex"><a href="#dom-select-selectedindex">selectedIndex</a></code> [ = <var title="">value</var> ]</dt>
522:
523: <dd>
524:
525: <p>Returns the index of the first selected item, if any, or
526: −1 if there is no selected item.</p>
527:
528: <p>Can be set, to change the selection.</p>
529:
530: </dd>
531:
532: <dt><var title="">select</var> . <code title="dom-select-value"><a href="#dom-select-value">value</a></code> [ = <var title="">value</var> ]</dt>
533:
534: <dd>
535:
536: <p>Returns the <a href="#concept-fe-value" title="concept-fe-value">value</a> of the
537: first selected item, if any, or the empty string if there is no
538: selected item.</p>
539:
540: <p>Can be set, to change the selection.</p>
541:
542: </dd>
543:
544: </dl><div class="example">
545:
546: <p>The following example shows how a <code><a href="#the-select-element">select</a></code> element
547: can be used to offer the user with a set of options from which the
548: user can select a single option. The default option is
549: preselected.</p>
550:
551: <pre><p>
552: <label for="unittype">Select unit type:</label>
553: <select id="unittype" name="unittype">
554: <option value="1"> Miner </option>
555: <option value="2"> Puffer </option>
556: <option value="3" selected> Snipey </option>
557: <option value="4"> Max </option>
558: <option value="5"> Firebot </option>
559: </select>
560: </p></pre>
561:
562: </div><div class="example">
563:
564: <p>Here, the user is offered a set of options from which he can
565: select any number. By default, all five options are selected.</p>
566:
567: <pre><p>
568: <label for="allowedunits">Select unit types to enable on this map:</label>
569: <select id="allowedunits" name="allowedunits" multiple>
570: <option value="1" selected> Miner </option>
571: <option value="2" selected> Puffer </option>
572: <option value="3" selected> Snipey </option>
573: <option value="4" selected> Max </option>
574: <option value="5" selected> Firebot </option>
575: </select>
576: </p></pre>
577:
578: </div><h4 id="the-datalist-element"><span class="secno">4.10.8 </span>The <dfn><code>datalist</code></dfn> element</h4><p class="XXX annotation"><b>Status: </b><i>Last call for comments</i></p><dl class="element"><dt>Categories</dt>
579: <dd><a href="content-models.html#flow-content">Flow content</a>.</dd>
580: <dd><a href="content-models.html#phrasing-content">Phrasing content</a>.</dd>
581: <dt>Contexts in which this element may be used:</dt>
582: <dd>Where <a href="content-models.html#phrasing-content">phrasing content</a> is expected.</dd>
583: <dt>Content model:</dt>
584: <dd>Either: <a href="content-models.html#phrasing-content">phrasing content</a>.</dd>
585: <dd>Or: Zero or more <code><a href="#the-option-element">option</a></code> elements.</dd>
586: <dt>Content attributes:</dt>
587: <dd><a href="elements.html#global-attributes">Global attributes</a></dd>
588: <dt>DOM interface:</dt>
589: <dd>
590: <pre class="idl">interface <dfn id="htmldatalistelement">HTMLDataListElement</dfn> : <a href="elements.html#htmlelement">HTMLElement</a> {
591: readonly attribute <a href="urls.html#htmlcollection">HTMLCollection</a> <a href="#dom-datalist-options" title="dom-datalist-options">options</a>;
592: };</pre>
593: </dd>
594: </dl><p>The <code><a href="#the-datalist-element">datalist</a></code> element represents a set of
595: <code><a href="#the-option-element">option</a></code> elements that represent predefined options for
596: other controls. The contents of the element represents fallback
597: content for legacy user agents, intermixed with <code><a href="#the-option-element">option</a></code>
598: elements that represent the predefined options. In the rendering,
599: the <code><a href="#the-datalist-element">datalist</a></code> element <a href="#represents">represents</a>
600: nothing.</p><p>The <code><a href="#the-datalist-element">datalist</a></code> element is hooked up to an
601: <code><a href="the-input-element.html#the-input-element">input</a></code> element using the <code title="attr-input-list"><a href="common-input-element-attributes.html#attr-input-list">list</a></code> attribute on the
602: <code><a href="the-input-element.html#the-input-element">input</a></code> element. <!-- v2DATAGRID The
603: <code>datalist</code> element can also be used with a
604: <code>datagrid</code> element, as the source of autocompletion hints
605: for <code title="datagrid-type-editable">editable</code>
606: cells. --></p><p>Each <code><a href="#the-option-element">option</a></code> element that is a descendant of the
607: <code><a href="#the-datalist-element">datalist</a></code> element, that is not <a href="#concept-option-disabled" title="concept-option-disabled">disabled</a>, and whose <a href="#concept-option-value" title="concept-option-value">value</a> is a string that isn't the
608: empty string, represents a suggestion. Each suggestion has a <a href="#concept-option-value" title="concept-option-value">value</a> and a <a href="#concept-option-label" title="concept-option-label">label</a>.
609:
610: </p><dl class="domintro"><dt><var title="">datalist</var> . <code title="dom-datalist-options"><a href="#dom-datalist-options">options</a></code></dt>
611:
612: <dd>
613: <p>Returns an <code><a href="urls.html#htmlcollection">HTMLCollection</a></code> of the <code>options</code> elements of the table.</p>
614: </dd>
615:
616: </dl><h4 id="the-optgroup-element"><span class="secno">4.10.9 </span>The <dfn><code>optgroup</code></dfn> element</h4><p class="XXX annotation"><b>Status: </b><i>Last call for comments</i></p><dl class="element"><dt>Categories</dt>
617: <dd>None.</dd>
618: <dt>Contexts in which this element may be used:</dt>
619: <dd>As a child of a <code><a href="#the-select-element">select</a></code> element.</dd>
620: <dt>Content model:</dt>
621: <dd>Zero or more <code><a href="#the-option-element">option</a></code> elements.</dd>
622: <dt>Content attributes:</dt>
623: <dd><a href="elements.html#global-attributes">Global attributes</a></dd>
624: <dd><code title="attr-optgroup-disabled"><a href="#attr-optgroup-disabled">disabled</a></code></dd>
625: <dd><code title="attr-optgroup-label"><a href="#attr-optgroup-label">label</a></code></dd>
626: <dt>DOM interface:</dt>
627: <dd>
628: <pre class="idl">interface <dfn id="htmloptgroupelement">HTMLOptGroupElement</dfn> : <a href="elements.html#htmlelement">HTMLElement</a> {
629: attribute boolean <a href="#dom-optgroup-disabled" title="dom-optgroup-disabled">disabled</a>;
630: attribute DOMString <a href="#dom-optgroup-label" title="dom-optgroup-label">label</a>;
631: };</pre>
632: </dd>
633: </dl><!-- v2: make optgroups selectable if they have a value. --><p>The <code><a href="#the-optgroup-element">optgroup</a></code> element <a href="#represents">represents</a> a group of
634: <code><a href="#the-option-element">option</a></code> elements with a common label.</p><p>The element's group of <code><a href="#the-option-element">option</a></code> elements consists of
635: the <code><a href="#the-option-element">option</a></code> elements that are children of the
636: <code><a href="#the-optgroup-element">optgroup</a></code> element.</p><p>The <dfn id="attr-optgroup-disabled" title="attr-optgroup-disabled"><code>disabled</code></dfn> attribute
637: is a <a href="common-microsyntaxes.html#boolean-attribute">boolean attribute</a> and can be used to <a href="#concept-option-disabled" title="concept-option-disabled">disable</a> a group of
638: <code><a href="#the-option-element">option</a></code> elements together.</p><p>The <dfn id="attr-optgroup-label" title="attr-optgroup-label"><code>label</code></dfn>
639: attribute must be specified. Its value gives the name of the group,
640: for the purposes of the user interface. </p><div class="example">
641:
642: <p>The following snippet shows how a set of lessons from three
643: courses could be offered in a <code><a href="#the-select-element">select</a></code> drop-down
644: widget:</p>
645:
646: <pre><form action="courseselector.dll" method="get">
647: <p>Which course would you like to watch today?
648: <p><label>Course:
649: <select name="c">
650: <optgroup label="8.01 Physics I: Classical Mechanics">
651: <option value="8.01.1">Lecture 01: Powers of Ten
652: <option value="8.01.2">Lecture 02: 1D Kinematics
653: <option value="8.01.3">Lecture 03: Vectors
654: <optgroup label="8.02 Electricity and Magnestism">
655: <option value="8.02.1">Lecture 01: What holds our world together?
656: <option value="8.02.2">Lecture 02: Electric Field
657: <option value="8.02.3">Lecture 03: Electric Flux
658: <optgroup label="8.03 Physics III: Vibrations and Waves">
659: <option value="8.03.1">Lecture 01: Periodic Phenomenon
660: <option value="8.03.2">Lecture 02: Beats
661: <option value="8.03.3">Lecture 03: Forced Oscillations with Damping
662: </select>
663: </label>
664: <p><input type=submit value="▶ Play">
665: </form></pre>
666:
667: </div><h4 id="the-option-element"><span class="secno">4.10.10 </span>The <dfn><code>option</code></dfn> element</h4><p class="XXX annotation"><b>Status: </b><i>Last call for comments</i></p><dl class="element"><dt>Categories</dt>
668: <dd>None.</dd>
669: <dt>Contexts in which this element may be used:</dt>
670: <dd>As a child of a <code><a href="#the-select-element">select</a></code> element.</dd>
671: <dd>As a child of a <code><a href="#the-datalist-element">datalist</a></code> element.</dd>
672: <dd>As a child of an <code><a href="#the-optgroup-element">optgroup</a></code> element.</dd>
673: <dt>Content model:</dt>
674: <dd><a href="content-models.html#text-content" title="text content">Text</a>.</dd>
675: <dt>Content attributes:</dt>
676: <dd><a href="elements.html#global-attributes">Global attributes</a></dd>
677: <dd><code title="attr-option-disabled"><a href="#attr-option-disabled">disabled</a></code></dd>
678: <dd><code title="attr-option-label"><a href="#attr-option-label">label</a></code></dd>
679: <dd><code title="attr-option-selected"><a href="#attr-option-selected">selected</a></code></dd>
680: <dd><code title="attr-option-value"><a href="#attr-option-value">value</a></code></dd>
681: <dt>DOM interface:</dt>
682: <dd>
683: <pre class="idl">[NamedConstructor=<a href="#dom-option" title="dom-option">Option</a>(),
684: NamedConstructor=<a href="#dom-option-t" title="dom-option-t">Option</a>(in DOMString text),
685: NamedConstructor=<a href="#dom-option-tv" title="dom-option-tv">Option</a>(in DOMString text, in DOMString value),
686: NamedConstructor=<a href="#dom-option-tvd" title="dom-option-tvd">Option</a>(in DOMString text, in DOMString value, in boolean defaultSelected),
687: NamedConstructor=<a href="#dom-option-tvds" title="dom-option-tvds">Option</a>(in DOMString text, in DOMString value, in boolean defaultSelected, in boolean selected)]
688: interface <dfn id="htmloptionelement">HTMLOptionElement</dfn> : <a href="elements.html#htmlelement">HTMLElement</a> {
689: attribute boolean <a href="#dom-option-disabled" title="dom-option-disabled">disabled</a>;
690: readonly attribute <a href="forms.html#htmlformelement">HTMLFormElement</a> <a href="#dom-option-form" title="dom-option-form">form</a>;
691: attribute DOMString <a href="#dom-option-label" title="dom-option-label">label</a>;
692: attribute boolean <a href="#dom-option-defaultselected" title="dom-option-defaultSelected">defaultSelected</a>;
693: attribute boolean <a href="#dom-option-selected" title="dom-option-selected">selected</a>;
694: attribute DOMString <a href="#dom-option-value" title="dom-option-value">value</a>;
695:
696: attribute DOMString <a href="#dom-option-text" title="dom-option-text">text</a>;
697: readonly attribute long <a href="#dom-option-index" title="dom-option-index">index</a>;
698: };</pre>
699: </dd>
700: </dl><p>The <code><a href="#the-option-element">option</a></code> element <a href="#represents">represents</a> an option
701: in a <code><a href="#the-select-element">select</a></code> element or as part of a list of suggestions
702: in a <code><a href="#the-datalist-element">datalist</a></code> element.</p><p>The <dfn id="attr-option-disabled" title="attr-option-disabled"><code>disabled</code></dfn>
703: attribute is a <a href="common-microsyntaxes.html#boolean-attribute">boolean attribute</a>. An
704: <code><a href="#the-option-element">option</a></code> element is <dfn id="concept-option-disabled" title="concept-option-disabled">disabled</dfn> if its <code title="attr-option-disabled"><a href="#attr-option-disabled">disabled</a></code> attribute is present or
705: if it is a child of an <code><a href="#the-optgroup-element">optgroup</a></code> element whose <code title="attr-optgroup-disabled"><a href="#attr-optgroup-disabled">disabled</a></code> attribute is
706: present.</p><p>The <dfn id="attr-option-label" title="attr-option-label"><code>label</code></dfn>
707: attribute provides a label for element. The <dfn id="concept-option-label" title="concept-option-label">label</dfn> of an <code><a href="#the-option-element">option</a></code>
708: element is the value of the <code title="attr-option-label"><a href="#attr-option-label">label</a></code> attribute, if there is one,
709: or the <code>textContent</code> of the element, if there isn't.</p><p>The <dfn id="attr-option-value" title="attr-option-value"><code>value</code></dfn>
710: attribute provides a value for element. The <dfn id="concept-option-value" title="concept-option-value">value</dfn> of an <code><a href="#the-option-element">option</a></code>
711: element is the value of the <code title="attr-option-value"><a href="#attr-option-value">value</a></code> attribute, if there is one,
712: or the <code>textContent</code> of the element, if there isn't.</p><p>The <dfn id="attr-option-selected" title="attr-option-selected"><code>selected</code></dfn>
713: attribute represents the default <a href="#concept-option-selectedness" title="concept-option-selectedness">selectedness</a> of the
714: element.</p><dl class="domintro"><dt><var title="">option</var> . <code title="dom-option-selected"><a href="#dom-option-selected">selected</a></code></dt>
715:
716: <dd>
717:
718: <p>Returns true if the element is selected, and false otherwise.</p>
719:
720: </dd>
721:
722: <dt><var title="">option</var> . <code title="dom-option-index"><a href="#dom-option-index">index</a></code></dt>
723:
724: <dd>
725:
726: <p>Returns the index of the element in its <code><a href="#the-select-element">select</a></code>
727: element's <code title="dom-select-options"><a href="#dom-select-options">options</a></code>
728: list.</p>
729:
730: </dd>
731:
732: <dt><var title="">option</var> . <code title="dom-option-form"><a href="#dom-option-form">form</a></code></dt>
733:
734: <dd>
735:
736: <p>Returns the element's <code><a href="forms.html#the-form-element">form</a></code> element, if any, or
737: null otherwise.</p>
738:
739: </dd>
740:
1.11 ! mike 741: <dt><var title="">option</var> . <code title="dom-option-text"><a href="#dom-option-text">text</a></code></dt>
! 742:
! 743: <dd>
! 744:
! 745: <p>Same as <code>textContent</code>.</p>
! 746:
! 747: </dd>
! 748:
1.9 mike 749: <dt><var title="">option</var> = new <code title="dom-option"><a href="#dom-option">Option</a></code>( [ <var title="">text</var> [, <var title="">value</var> [, <var title="">defaultSelected</var> [, <var title="">selected</var> ] ] ] ] )</dt>
750:
751: <dd>
752:
753: <p>Returns a new <code><a href="#the-option-element">option</a></code> element.</p>
754:
755: <p>The <var title="">text</var> argument sets the contents of the element.</p>
756: <p>The <var title="">value</var> argument sets the <code title="attr-option-value"><a href="#attr-option-value">value</a></code> attribute.</p>
757: <p>The <var title="">defaultSelected</var> argument sets the <code title="attr-option-selected"><a href="#attr-option-selected">selected</a></code> attribute.</p>
758: <p>The <var title="">selected</var> argument sets whether or not the element is selected. If it is omitted, even if the <var title="">defaultSelected</var> argument is true, the element is not selected.</p>
759:
760: </dd>
761:
762: </dl><h4 id="the-textarea-element"><span class="secno">4.10.11 </span>The <dfn><code>textarea</code></dfn> element</h4><p class="XXX annotation"><b>Status: </b><i>Last call for comments</i></p><dl class="element"><dt>Categories</dt>
763: <dd><a href="content-models.html#flow-content">Flow content</a>.</dd>
764: <dd><a href="content-models.html#phrasing-content">Phrasing content</a>.</dd>
765: <dd><a href="content-models.html#interactive-content">Interactive content</a>.</dd>
766: <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>
767: <dt>Contexts in which this element may be used:</dt>
768: <dd>Where <a href="content-models.html#phrasing-content">phrasing content</a> is expected.</dd>
769: <dt>Content model:</dt>
770: <dd><a href="content-models.html#text-content" title="text content">Text</a>.</dd>
771: <dt>Content attributes:</dt>
772: <dd><a href="elements.html#global-attributes">Global attributes</a></dd>
773: <dd><code title="attr-fe-autofocus"><a href="association-of-controls-and-forms.html#attr-fe-autofocus">autofocus</a></code></dd>
774: <dd><code title="attr-textarea-cols"><a href="#attr-textarea-cols">cols</a></code></dd>
775: <dd><code title="attr-fe-disabled"><a href="association-of-controls-and-forms.html#attr-fe-disabled">disabled</a></code></dd>
776: <dd><code title="attr-fae-form"><a href="association-of-controls-and-forms.html#attr-fae-form">form</a></code></dd>
777: <dd><code title="attr-textarea-maxlength"><a href="#attr-textarea-maxlength">maxlength</a></code></dd>
778: <dd><code title="attr-fe-name"><a href="association-of-controls-and-forms.html#attr-fe-name">name</a></code></dd>
779: <dd><code title="attr-textarea-placeholder"><a href="#attr-textarea-placeholder">placeholder</a></code></dd>
780: <dd><code title="attr-textarea-readonly"><a href="#attr-textarea-readonly">readonly</a></code></dd>
781: <dd><code title="attr-textarea-required"><a href="#attr-textarea-required">required</a></code></dd>
782: <dd><code title="attr-textarea-rows"><a href="#attr-textarea-rows">rows</a></code></dd>
783: <dd><code title="attr-textarea-wrap"><a href="#attr-textarea-wrap">wrap</a></code></dd>
784: <dt>DOM interface:</dt>
785: <dd>
786: <pre class="idl">interface <dfn id="htmltextareaelement">HTMLTextAreaElement</dfn> : <a href="elements.html#htmlelement">HTMLElement</a> {
787: attribute boolean <a href="#dom-fe-autofocus" title="dom-fe-autofocus">autofocus</a>;
788: attribute unsigned long <a href="#dom-textarea-cols" title="dom-textarea-cols">cols</a>;
789: attribute boolean <a href="#dom-fe-disabled" title="dom-fe-disabled">disabled</a>;
790: readonly attribute <a href="forms.html#htmlformelement">HTMLFormElement</a> <a href="#dom-fae-form" title="dom-fae-form">form</a>;
791: attribute long <a href="#dom-textarea-maxlength" title="dom-textarea-maxLength">maxLength</a>;
792: attribute DOMString <a href="#dom-fe-name" title="dom-fe-name">name</a>;
793: attribute DOMString <a href="#dom-textarea-placeholder" title="dom-textarea-placeholder">placeholder</a>;
794: attribute boolean <a href="#dom-textarea-readonly" title="dom-textarea-readOnly">readOnly</a>;
795: attribute boolean <a href="#dom-textarea-required" title="dom-textarea-required">required</a>;
796: attribute unsigned long <a href="#dom-textarea-rows" title="dom-textarea-rows">rows</a>;
797: attribute DOMString <a href="#dom-textarea-wrap" title="dom-textarea-wrap">wrap</a>;
798:
799: readonly attribute DOMString <a href="#dom-textarea-type" title="dom-textarea-type">type</a>;
800: attribute DOMString <a href="#dom-textarea-defaultvalue" title="dom-textarea-defaultValue">defaultValue</a>;
801: attribute DOMString <a href="#dom-textarea-value" title="dom-textarea-value">value</a>;
802: readonly attribute unsigned long <a href="#dom-textarea-textlength" title="dom-textarea-textLength">textLength</a>;
803:
804: readonly attribute boolean <a href="#dom-cva-willvalidate" title="dom-cva-willValidate">willValidate</a>;
805: readonly attribute <a href="#validitystate">ValidityState</a> <a href="#dom-cva-validity" title="dom-cva-validity">validity</a>;
806: readonly attribute DOMString <a href="#dom-cva-validationmessage" title="dom-cva-validationMessage">validationMessage</a>;
807: boolean <a href="#dom-cva-checkvalidatity" title="dom-cva-checkValidatity">checkValidity</a>();
808: void <a href="#dom-cva-setcustomvalidity" title="dom-cva-setCustomValidity">setCustomValidity</a>(in DOMString error);
809:
810: readonly attribute <span>NodeList</span> <a href="#dom-lfe-labels" title="dom-lfe-labels">labels</a>;
811:
812: void <a href="#dom-textarea-input-select" title="dom-textarea/input-select">select</a>();
813: attribute unsigned long <a href="#dom-textarea-input-selectionstart" title="dom-textarea/input-selectionStart">selectionStart</a>;
814: attribute unsigned long <a href="#dom-textarea-input-selectionend" title="dom-textarea/input-selectionEnd">selectionEnd</a>;
815: void <a href="#dom-textarea-input-setselectionrange" title="dom-textarea/input-setSelectionRange">setSelectionRange</a>(in unsigned long start, in unsigned long end);
816: };</pre>
817: </dd>
818: </dl><p>The <code><a href="#the-textarea-element">textarea</a></code> element <a href="#represents">represents</a> a
819: multiline plain text edit control. The contents of the control represent the
820: control's default value.</p><p>The <dfn id="attr-textarea-readonly" title="attr-textarea-readonly"><code>readonly</code></dfn> attribute
821: is a <a href="common-microsyntaxes.html#boolean-attribute">boolean attribute</a> used to control whether the text
822: can be edited by the user or not.</p><p>The <dfn id="attr-textarea-cols" title="attr-textarea-cols"><code>cols</code></dfn>
823: attribute specifies the expected maximum number of characters per
824: line. If the <code title="attr-textarea-cols"><a href="#attr-textarea-cols">cols</a></code> attribute
825: is specified, its value must be a <a href="common-microsyntaxes.html#valid-non-negative-integer">valid non-negative
826: integer</a> greater than zero. </p><p>The <dfn id="attr-textarea-rows" title="attr-textarea-rows"><code>rows</code></dfn>
827: attribute specifies the number of lines to show. If the <code title="attr-textarea-rows"><a href="#attr-textarea-rows">rows</a></code> attribute is specified, its
828: value must be a <a href="common-microsyntaxes.html#valid-non-negative-integer">valid non-negative integer</a> greater than
829: zero. </p><p>The <dfn id="attr-textarea-wrap" title="attr-textarea-wrap"><code>wrap</code></dfn>
830: attribute is an <a href="common-microsyntaxes.html#enumerated-attribute">enumerated attribute</a> with two keywords
831: and states: the <dfn id="attr-textarea-wrap-soft" title="attr-textarea-wrap-soft"><code>soft</code></dfn> keyword
832: which maps to the <dfn id="attr-textarea-wrap-soft-state" title="attr-textarea-wrap-soft-state">Soft</dfn> state, and the
833: <dfn id="attr-textarea-wrap-hard" title="attr-textarea-wrap-hard"><code>hard</code></dfn> keyword
834: which maps to the <dfn id="attr-textarea-wrap-hard-state" title="attr-textarea-wrap-hard-state">Hard</dfn> state. The
835: <i>missing value default</i> is the <a href="#attr-textarea-wrap-soft-state" title="attr-textarea-wrap-soft-state">Soft</a> state.</p><p>If the element's <code title="attr-textarea-wrap"><a href="#attr-textarea-wrap">wrap</a></code>
836: attribute is in the <a href="#attr-textarea-wrap-hard-state" title="attr-textarea-wrap-hard-state">Hard</a> state, the <code title="attr-textarea-cols"><a href="#attr-textarea-cols">cols</a></code> attribute must be
837: specified.</p><!-- attr-textarea-wrap-off (attr-textarea-wrap-off-state): not
838: conforming; turns off the rendering of wrapping but otherwise acts
839: like 'soft' --><p>The <dfn id="attr-textarea-maxlength" title="attr-textarea-maxlength"><code>maxlength</code></dfn>
840: attribute is a <a href="association-of-controls-and-forms.html#attr-fe-maxlength" title="attr-fe-maxlength">form control <code title="">maxlength</code> attribute</a> controlled by the
841: <code><a href="#the-textarea-element">textarea</a></code> element's <a href="#concept-textarea-dirty" title="concept-textarea-dirty">dirty value flag</a>.</p><p>If the <code><a href="#the-textarea-element">textarea</a></code> element has a <a href="association-of-controls-and-forms.html#maximum-allowed-value-length">maximum allowed
842: value length</a>, then the element's children must be such that
843: the <a href="#code-point-length">code-point length</a> of the value of the element's
844: <code>textContent</code> IDL attribute is equal to or less than the
845: element's <a href="association-of-controls-and-forms.html#maximum-allowed-value-length">maximum allowed value length</a>.</p><p>The <dfn id="attr-textarea-required" title="attr-textarea-required"><code>required</code></dfn> attribute
846: is a <a href="common-microsyntaxes.html#boolean-attribute">boolean attribute</a>. When specified, the user will
847: be required to enter a value before submitting the form.</p><!-- similar text in the <input> section --><p>The <dfn id="attr-textarea-placeholder" title="attr-textarea-placeholder"><code>placeholder</code></dfn>
848: attribute represents a hint (a word or short phrase) intended to aid
849: the user with data entry. A hint could be a sample value or a brief
850: description of the expected format. The attribute, if specified,
851: must have a value that contains no U+000A LINE FEED (LF) or U+000D
852: CARRIAGE RETURN (CR) characters.</p><p class="note">For a longer hint or other advisory text, the <code title="attr-title"><a href="elements.html#the-title-attribute">title</a></code> attribute is more appropriate.</p><p>The <code title="attr-textarea-placeholder"><a href="#attr-textarea-placeholder">placeholder</a></code>
853: attribute should not be used as an alternative to a
854: <code><a href="forms.html#the-label-element">label</a></code>.</p><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
855: explicitly associate the <code><a href="#the-textarea-element">textarea</a></code> element with its
856: <a href="association-of-controls-and-forms.html#form-owner">form owner</a>. The <code title="attr-fe-name"><a href="association-of-controls-and-forms.html#attr-fe-name">name</a></code>
857: attribute represents the element's name. The <code title="attr-fe-disabled"><a href="association-of-controls-and-forms.html#attr-fe-disabled">disabled</a></code> attribute is used to make
858: the control non-interactive and to prevent its value from being
859: submitted. The <code title="attr-fe-autofocus"><a href="association-of-controls-and-forms.html#attr-fe-autofocus">autofocus</a></code>
860: attribute controls focus.</p><dl class="domintro"><dt><var title="">textarea</var> . <code title="attr-textarea-type">type</code></dt>
861:
862: <dd>
863:
864: <p>Returns the string "<code title="">textarea</code>".</p>
865:
866: </dd>
867:
868: <dt><var title="">textarea</var> . <code title="attr-textarea-value">value</code></dt>
869:
870: <dd>
871:
872: <p>Returns the current value of the element.</p>
873:
874: <p>Can be set, to change the value.</p>
875:
876: </dd>
877:
878: </dl><div class="example">
879:
880: <p>Here is an example of a <code><a href="#the-textarea-element">textarea</a></code> being used for
881: unrestricted free-form text input in a form:</p>
882:
883: <pre><p>If you have any comments, please let us know: <textarea cols=80 name=comments></textarea></p></pre>
884:
885: </div><h4 id="the-keygen-element"><span class="secno">4.10.12 </span>The <dfn><code>keygen</code></dfn> element</h4><p class="XXX annotation"><b>Status: </b><i>Last call for comments</i></p><dl class="element"><dt>Categories</dt>
886: <dd><a href="content-models.html#flow-content">Flow content</a>.</dd>
887: <dd><a href="content-models.html#phrasing-content">Phrasing content</a>.</dd>
888: <dd><a href="content-models.html#interactive-content">Interactive content</a>.</dd>
889: <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>
890: <dt>Contexts in which this element may be used:</dt>
891: <dd>Where <a href="content-models.html#phrasing-content">phrasing content</a> is expected.</dd>
892: <dt>Content model:</dt>
893: <dd>Empty.</dd>
894: <dt>Content attributes:</dt>
895: <dd><a href="elements.html#global-attributes">Global attributes</a></dd>
896: <dd><code title="attr-fe-autofocus"><a href="association-of-controls-and-forms.html#attr-fe-autofocus">autofocus</a></code></dd>
897: <dd><code title="attr-keygen-challenge"><a href="#attr-keygen-challenge">challenge</a></code></dd>
898: <dd><code title="attr-fe-disabled"><a href="association-of-controls-and-forms.html#attr-fe-disabled">disabled</a></code></dd>
899: <dd><code title="attr-fae-form"><a href="association-of-controls-and-forms.html#attr-fae-form">form</a></code></dd>
900: <dd><code title="attr-keygen-keytype"><a href="#attr-keygen-keytype">keytype</a></code></dd>
901: <dd><code title="attr-fe-name"><a href="association-of-controls-and-forms.html#attr-fe-name">name</a></code></dd>
902: <dt>DOM interface:</dt>
903: <dd>
904: <pre class="idl">interface <dfn id="htmlkeygenelement">HTMLKeygenElement</dfn> : <a href="elements.html#htmlelement">HTMLElement</a> {
905: attribute boolean <a href="#dom-fe-autofocus" title="dom-fe-autofocus">autofocus</a>;
906: attribute DOMString <a href="#dom-keygen-challenge" title="dom-keygen-challenge">challenge</a>;
907: attribute boolean <a href="#dom-fe-disabled" title="dom-fe-disabled">disabled</a>;
908: readonly attribute <a href="forms.html#htmlformelement">HTMLFormElement</a> <a href="#dom-fae-form" title="dom-fae-form">form</a>;
909: attribute DOMString <a href="#dom-keygen-keytype" title="dom-keygen-keytype">keytype</a>;
910: attribute DOMString <a href="#dom-fe-name" title="dom-fe-name">name</a>;
911:
912: readonly attribute DOMString <a href="#dom-keygen-type" title="dom-keygen-type">type</a>;
913:
914: readonly attribute boolean <a href="#dom-cva-willvalidate" title="dom-cva-willValidate">willValidate</a>;
915: readonly attribute <a href="#validitystate">ValidityState</a> <a href="#dom-cva-validity" title="dom-cva-validity">validity</a>;
916: readonly attribute DOMString <a href="#dom-cva-validationmessage" title="dom-cva-validationMessage">validationMessage</a>;
917: boolean <a href="#dom-cva-checkvalidatity" title="dom-cva-checkValidatity">checkValidity</a>();
918: void <a href="#dom-cva-setcustomvalidity" title="dom-cva-setCustomValidity">setCustomValidity</a>(in DOMString error);
919:
920: readonly attribute <span>NodeList</span> <a href="#dom-lfe-labels" title="dom-lfe-labels">labels</a>;
921: };</pre>
922: </dd>
923: </dl><p>The <code><a href="#the-keygen-element">keygen</a></code> element <a href="#represents">represents</a> a key
924: pair generator control. When the control's form is submitted, the
925: private key is stored in the local keystore, and the public key is
926: packaged and sent to the server.</p><p>The <dfn id="attr-keygen-challenge" title="attr-keygen-challenge"><code>challenge</code></dfn> attribute
927: may be specified. Its value will be packaged with the submitted
928: key.</p><p>The <dfn id="attr-keygen-keytype" title="attr-keygen-keytype"><code>keytype</code></dfn>
929: attribute is an <a href="common-microsyntaxes.html#enumerated-attribute">enumerated attribute</a>. The following
930: table lists the keywords and states for the attribute — the
931: keywords in the left column map to the states listed in the cell in
932: the second column on the same row as the keyword. User agents are
933: not required to support these values, and must only recognise values
934: whose corresponding algorithms they support.</p><table><thead><tr><th> Keyword </th><th> State
935: </th></tr></thead><tbody><tr><td> <code title="">rsa</code>
936: </td><td> <i title="">RSA</i>
937: <!-- v2 (see below)
938: <tr>
939: <td> <code title="">ec</code>
940: <td> <i title="">EC</i>
941: -->
942: </td></tr></tbody></table><p>The <i>invalid value default</i> state is the <i title="">unknown</i> state. The <i>missing value default</i> state
943: is the <i title="">RSA</i> state, if it is supported, or the <i title="">unknown</i> state otherwise.</p><p class="note">This specification does not specify what key types
944: user agents are to support — it is possible for a user agent
945: to not support any key types at all.</p><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
946: explicitly associate the <code><a href="#the-keygen-element">keygen</a></code> element with its
947: <a href="association-of-controls-and-forms.html#form-owner">form owner</a>. The <code title="attr-fe-name"><a href="association-of-controls-and-forms.html#attr-fe-name">name</a></code>
948: attribute represents the element's name. The <code title="attr-fe-disabled"><a href="association-of-controls-and-forms.html#attr-fe-disabled">disabled</a></code> attribute is used to make
949: the control non-interactive and to prevent its value from being
950: submitted. The <code title="attr-fe-autofocus"><a href="association-of-controls-and-forms.html#attr-fe-autofocus">autofocus</a></code>
951: attribute controls focus.</p><dl class="domintro"><dt><var title="">keygen</var> . <code title="attr-keygen-type">type</code></dt>
952:
953: <dd>
954:
955: <p>Returns the string "<code title="">keygen</code>".</p>
956:
957: </dd>
958:
959: </dl><p class="note">This specification does not specify how the private
960: key generated is to be used. It is expected that after receiving the
961: <code><a href="#signedpublickeyandchallenge">SignedPublicKeyAndChallenge</a></code> (SPKAC) structure, the
962: server will generate a client certificate and offer it back to the
963: user for download; this certificate, once downloaded and stored in
964: the key store along with the private key, can then be used to
965: authenticate to services that use SSL and certificate
966: authentication.</p><!-- how does the UA know which private key is associated with a
967: certificate it gets back after the server has taken the public key
968: created by <keygen> and turned it into a client cert? --><div class="example">
969:
970: <p>To generate a key pair, add the private key to the user's key
971: store, and submit the public key to the server, markup such as the
972: following can be used:</p>
973:
974: <pre><form action="processkey.cgi" method="post" enctype="multipart/formdata">
975: <p><keygen name="key"></p>
976: <p><input type=submit value="Submit key..."></p>
977: </form></pre>
978:
979: <p>The server will then receive a form submission with a packaged
980: RSA public key as the value of "<code title="">key</code>". This
981: can then be used for various purposes, such as generating a client
982: certificate, as mentioned above.</p>
983:
984: </div><h4 id="the-output-element"><span class="secno">4.10.13 </span>The <dfn><code>output</code></dfn> element</h4><p class="XXX annotation"><b>Status: </b><i>Last call for comments</i></p><dl class="element"><dt>Categories</dt>
985: <dd><a href="content-models.html#flow-content">Flow content</a>.</dd>
986: <dd><a href="content-models.html#phrasing-content">Phrasing content</a>.</dd>
1.11 ! mike 987: <dd><a href="forms.html#category-listed" title="category-listed">Listed</a>, <a href="forms.html#category-label" title="category-label">labelable</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>
1.9 mike 988: <dt>Contexts in which this element may be used:</dt>
989: <dd>Where <a href="content-models.html#phrasing-content">phrasing content</a> is expected.</dd>
990: <dt>Content model:</dt>
991: <dd><a href="content-models.html#phrasing-content">Phrasing content</a>.</dd>
992: <dt>Content attributes:</dt>
993: <dd><a href="elements.html#global-attributes">Global attributes</a></dd>
994: <dd><code title="attr-output-for"><a href="#attr-output-for">for</a></code></dd>
995: <dd><code title="attr-fae-form"><a href="association-of-controls-and-forms.html#attr-fae-form">form</a></code></dd>
996: <dd><code title="attr-fe-name"><a href="association-of-controls-and-forms.html#attr-fe-name">name</a></code></dd>
997: <dt>DOM interface:</dt>
998: <dd>
999: <pre class="idl">interface <dfn id="htmloutputelement">HTMLOutputElement</dfn> : <a href="elements.html#htmlelement">HTMLElement</a> {
1000: attribute DOMString <span title="dom-output-wrap">htmlFor</span>;
1001: readonly attribute <a href="forms.html#htmlformelement">HTMLFormElement</a> <a href="#dom-fae-form" title="dom-fae-form">form</a>;
1002: attribute DOMString <a href="#dom-fe-name" title="dom-fe-name">name</a>;
1003:
1004: readonly attribute DOMString <a href="#dom-output-type" title="dom-output-type">type</a>;
1005: attribute DOMString <a href="#dom-output-defaultvalue" title="dom-output-defaultValue">defaultValue</a>;
1006: attribute DOMString <a href="#dom-output-value" title="dom-output-value">value</a>;
1007:
1008: readonly attribute boolean <a href="#dom-cva-willvalidate" title="dom-cva-willValidate">willValidate</a>;
1009: readonly attribute <a href="#validitystate">ValidityState</a> <a href="#dom-cva-validity" title="dom-cva-validity">validity</a>;
1010: readonly attribute DOMString <a href="#dom-cva-validationmessage" title="dom-cva-validationMessage">validationMessage</a>;
1011: boolean <a href="#dom-cva-checkvalidatity" title="dom-cva-checkValidatity">checkValidity</a>();
1012: void <a href="#dom-cva-setcustomvalidity" title="dom-cva-setCustomValidity">setCustomValidity</a>(in DOMString error);
1.11 ! mike 1013:
! 1014: readonly attribute <span>NodeList</span> <a href="#dom-lfe-labels" title="dom-lfe-labels">labels</a>;
1.9 mike 1015: };</pre>
1016: </dd>
1017: </dl><p>The <code><a href="#the-output-element">output</a></code> element <a href="#represents">represents</a> the result of a
1018: calculation.</p><p>The <dfn id="attr-output-for" title="attr-output-for"><code>for</code></dfn> content
1019: attribute allows an explicit relationship to be made between the
1020: result of a calculation and the elements that represent the values
1021: that went into the calculation or that otherwise influenced the
1022: calculation. The <code title="attr-output-for"><a href="#attr-output-for">for</a></code> attribute,
1023: if specified, must contain a string consisting of an <a href="common-microsyntaxes.html#unordered-set-of-unique-space-separated-tokens">unordered
1024: set of unique space-separated tokens</a>, each of which must have
1025: the value of an ID of an element in the same
1026: <code>Document</code>.</p><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
1027: explicitly associate the <code><a href="#the-output-element">output</a></code> element with its
1028: <a href="association-of-controls-and-forms.html#form-owner">form owner</a>. The <code title="attr-fe-name"><a href="association-of-controls-and-forms.html#attr-fe-name">name</a></code>
1029: attribute represents the element's name.</p><dl class="domintro"><dt><var title="">output</var> . <code title="dom-output-value"><a href="#dom-output-value">value</a></code> [ = <var title="">value</var> ]</dt>
1030:
1031: <dd>
1032:
1033: <p>Returns the element's current value.</p>
1034:
1035: <p>Can be set, to change the value.</p>
1036:
1037: </dd>
1038:
1039: <dt><var title="">output</var> . <code title="dom-output-defaultValue"><a href="#dom-output-defaultvalue">defaultValue</a></code> [ = <var title="">value</var> ]</dt>
1040:
1041: <dd>
1042:
1043: <p>Returns the element's current default value.</p>
1044:
1045: <p>Can be set, to change the default value.</p>
1046:
1047: </dd>
1048:
1049: <dt><var title="">output</var> . <code title="dom-output-type"><a href="#dom-output-type">type</a></code></dt>
1050:
1051: <dd>
1052:
1053: <p>Returns the string "<code title="">output</code>".</p>
1054:
1055: </dd>
1056:
1057: </dl><div class="example">
1058:
1059: <p>A simple calculator could use <code><a href="#the-output-element">output</a></code> for its
1060: display of calculated results:</p>
1061:
1062: <pre><form onsubmit="return false">
1063: <input name=a type=number step=any> +
1064: <input name=b type=number step=any> =
1065: <output onforminput="value = a.value + b.value"></output>
1066: </form></pre>
1067:
1.11 ! mike 1068: </div><h4 id="the-progress-element"><span class="secno">4.10.14 </span>The <dfn><code>progress</code></dfn> element</h4><p class="XXX annotation"><b>Status: </b><i>Last call for comments</i></p><dl class="element"><dt>Categories</dt>
! 1069: <dd><a href="content-models.html#flow-content">Flow content</a>.</dd>
! 1070: <dd><a href="content-models.html#phrasing-content">Phrasing content</a>.</dd>
! 1071: <dd><a href="forms.html#category-label" title="category-label">Labelable</a> <a href="forms.html#form-associated-element">form-associated element</a>.</dd>
! 1072: <dt>Contexts in which this element may be used:</dt>
! 1073: <dd>Where <a href="content-models.html#phrasing-content">phrasing content</a> is expected.</dd>
! 1074: <dt>Content model:</dt>
! 1075: <dd><a href="content-models.html#phrasing-content">Phrasing content</a>, but there must be no <code><a href="#the-progress-element">progress</a></code> element descendants.</dd>
! 1076: <dt>Content attributes:</dt>
! 1077: <dd><a href="elements.html#global-attributes">Global attributes</a></dd>
! 1078: <dd><code title="attr-progress-value"><a href="#attr-progress-value">value</a></code></dd>
! 1079: <dd><code title="attr-progress-max"><a href="#attr-progress-max">max</a></code></dd>
! 1080: <dd><code title="attr-fae-form"><a href="association-of-controls-and-forms.html#attr-fae-form">form</a></code></dd>
! 1081: <dt>DOM interface:</dt>
! 1082: <dd>
! 1083: <pre class="idl">interface <dfn id="htmlprogresselement">HTMLProgressElement</dfn> : <a href="elements.html#htmlelement">HTMLElement</a> {
! 1084: attribute float <a href="#dom-progress-value" title="dom-progress-value">value</a>;
! 1085: attribute float <a href="#dom-progress-max" title="dom-progress-max">max</a>;
! 1086: readonly attribute float <a href="#dom-progress-position" title="dom-progress-position">position</a>;
! 1087: readonly attribute <a href="forms.html#htmlformelement">HTMLFormElement</a> <a href="#dom-fae-form" title="dom-fae-form">form</a>;
! 1088: readonly attribute <span>NodeList</span> <a href="#dom-lfe-labels" title="dom-lfe-labels">labels</a>;
! 1089: };</pre>
! 1090: </dd>
! 1091: </dl><p>The <code><a href="#the-progress-element">progress</a></code> element <a href="#represents">represents</a> the
! 1092: completion progress of a task. The progress is either indeterminate,
! 1093: indicating that progress is being made but that it is not clear how
! 1094: much more work remains to be done before the task is complete
! 1095: (e.g. because the task is waiting for a remote host to respond), or
! 1096: the progress is a number in the range zero to a maximum, giving the
! 1097: fraction of work that has so far been completed.</p><p>There are two attributes that determine the current task
! 1098: completion represented by the element.</p><p>The <dfn id="attr-progress-value" title="attr-progress-value"><code>value</code></dfn>
! 1099: attribute specifies how much of the task has been completed, and the
! 1100: <dfn id="attr-progress-max" title="attr-progress-max"><code>max</code></dfn> attribute
! 1101: specifies how much work the task requires in total. The units are
! 1102: arbitrary and not specified.</p><p>Authors are encouraged to also include the current value and the
! 1103: maximum value inline as text inside the element, so that the
! 1104: progress is made available to users of legacy user agents.</p><div class="example">
! 1105: <p>Here is a snippet of a Web application that shows the progress
! 1106: of some automated task:</p>
! 1107: <pre><section>
! 1108: <h2>Task Progress</h2>
! 1109: <p>Progress: <progress id="p" max=100><span>0</span>%</progress></p>
! 1110: <script>
! 1111: var progressBar = document.getElementById('p');
! 1112: function updateProgress(newValue) {
! 1113: progressBar.value = newValue;
! 1114: progressBar.getElementsByTagName('span')[0].textContent = newValue;
! 1115: }
! 1116: </script>
! 1117: </section></pre>
! 1118: <p>(The <code>updateProgress()</code> method in this example would
! 1119: be called by some other code on the page to update the actual
! 1120: progress bar as the task progressed.)</p>
! 1121: </div><p>The <code title="attr-progress-value"><a href="#attr-progress-value">value</a></code> and <code title="attr-progress-max"><a href="#attr-progress-max">max</a></code> attributes, when present, must
! 1122: have values that are <a href="common-microsyntaxes.html#valid-floating-point-number" title="valid floating point number">valid
! 1123: floating point numbers</a>. The <code title="attr-progress-value"><a href="#attr-progress-value">value</a></code> attribute, if present, must
! 1124: have a value equal to or greater than zero, and less than or equal
! 1125: to the value of the <code title="attr-progress-max"><a href="#attr-progress-max">max</a></code>
! 1126: attribute, if present, or 1.0, otherwise. The <code title="attr-progress-max"><a href="#attr-progress-max">max</a></code> attribute, if present, must
! 1127: have a value greater than zero.</p><p class="note">The <code><a href="#the-progress-element">progress</a></code> element is the wrong
! 1128: element to use for something that is just a gauge, as opposed to
! 1129: task progress. For instance, indicating disk space usage using
! 1130: <code><a href="#the-progress-element">progress</a></code> would be inappropriate. Instead, the
! 1131: <code><a href="#the-meter-element">meter</a></code> element is available for such use cases.</p><dl class="domintro"><dt><var title="">progress</var> . <code title="dom-progress-position"><a href="#dom-progress-position">position</a></code></dt>
! 1132:
! 1133: <dd>
! 1134:
! 1135: <p>For a determinate progress bar (one with known current and
! 1136: maximum values), returns the result of dividing the current value
! 1137: by the maximum value.</p>
! 1138:
! 1139: <p>For an indeterminate progress bar, returns −1.</p>
! 1140:
! 1141: </dd></dl><h4 id="the-meter-element"><span class="secno">4.10.15 </span>The <dfn><code>meter</code></dfn> element</h4><p class="XXX annotation"><b>Status: </b><i>Last call for comments</i></p><!-- Keep this after <progress> and NOT close to <time> --><dl class="element"><dt>Categories</dt>
! 1142: <dd><a href="content-models.html#flow-content">Flow content</a>.</dd>
! 1143: <dd><a href="content-models.html#phrasing-content">Phrasing content</a>.</dd>
! 1144: <dd><a href="forms.html#category-label" title="category-label">Labelable</a> <a href="forms.html#form-associated-element">form-associated element</a>.</dd>
! 1145: <dt>Contexts in which this element may be used:</dt>
! 1146: <dd>Where <a href="content-models.html#phrasing-content">phrasing content</a> is expected.</dd>
! 1147: <dt>Content model:</dt>
! 1148: <dd><a href="content-models.html#phrasing-content">Phrasing content</a>, but there must be no <code><a href="#the-meter-element">meter</a></code> element descendants.</dd>
! 1149: <dt>Content attributes:</dt>
! 1150: <dd><a href="elements.html#global-attributes">Global attributes</a></dd>
! 1151: <dd><code title="attr-meter-value"><a href="#attr-meter-value">value</a></code></dd>
! 1152: <dd><code title="attr-meter-min"><a href="#attr-meter-min">min</a></code></dd>
! 1153: <dd><code title="attr-meter-max"><a href="#attr-meter-max">max</a></code></dd>
! 1154: <dd><code title="attr-meter-low"><a href="#attr-meter-low">low</a></code></dd>
! 1155: <dd><code title="attr-meter-high"><a href="#attr-meter-high">high</a></code></dd>
! 1156: <dd><code title="attr-meter-optimum"><a href="#attr-meter-optimum">optimum</a></code></dd>
! 1157: <dd><code title="attr-fae-form"><a href="association-of-controls-and-forms.html#attr-fae-form">form</a></code></dd>
! 1158: <dt>DOM interface:</dt>
! 1159: <dd>
! 1160: <pre class="idl">interface <dfn id="htmlmeterelement">HTMLMeterElement</dfn> : <a href="elements.html#htmlelement">HTMLElement</a> {
! 1161: attribute float <a href="#dom-meter-value" title="dom-meter-value">value</a>;
! 1162: attribute float <a href="#dom-meter-min" title="dom-meter-min">min</a>;
! 1163: attribute float <a href="#dom-meter-max" title="dom-meter-max">max</a>;
! 1164: attribute float <a href="#dom-meter-low" title="dom-meter-low">low</a>;
! 1165: attribute float <a href="#dom-meter-high" title="dom-meter-high">high</a>;
! 1166: attribute float <a href="#dom-meter-optimum" title="dom-meter-optimum">optimum</a>;
! 1167: readonly attribute <a href="forms.html#htmlformelement">HTMLFormElement</a> <a href="#dom-fae-form" title="dom-fae-form">form</a>;
! 1168: readonly attribute <span>NodeList</span> <a href="#dom-lfe-labels" title="dom-lfe-labels">labels</a>;
! 1169: };</pre>
! 1170: </dd>
! 1171: </dl><p>The <code><a href="#the-meter-element">meter</a></code> element <a href="#represents">represents</a> a scalar
! 1172: measurement within a known range, or a fractional value; for example
! 1173: disk usage, the relevance of a query result, or the fraction of a
! 1174: voting population to have selected a particular candidate.</p><p>This is also known as a gauge.</p><p class="note">The <code><a href="#the-meter-element">meter</a></code> element should not be used to
! 1175: indicate progress (as in a progress bar). For that role, HTML
! 1176: provides a separate <code><a href="#the-progress-element">progress</a></code> element.</p><p class="note">The <code><a href="#the-meter-element">meter</a></code> element also does not
! 1177: represent a scalar value of arbitrary range — for example, it
! 1178: would be wrong to use this to report a weight, or height, unless
! 1179: there is a known maximum value.</p><p>There are six attributes that determine the semantics of the
! 1180: gauge represented by the element.</p><p>The <dfn id="attr-meter-min" title="attr-meter-min"><code>min</code></dfn> attribute
! 1181: specifies the lower bound of the range, and the <dfn id="attr-meter-max" title="attr-meter-max"><code>max</code></dfn> attribute specifies
! 1182: the upper bound. The <dfn id="attr-meter-value" title="attr-meter-value"><code>value</code></dfn> attribute
! 1183: specifies the value to have the gauge indicate as the "measured"
! 1184: value.</p><p>The other three attributes can be used to segment the gauge's
! 1185: range into "low", "medium", and "high" parts, and to indicate which
! 1186: part of the gauge is the "optimum" part. The <dfn id="attr-meter-low" title="attr-meter-low"><code>low</code></dfn> attribute specifies
! 1187: the range that is considered to be the "low" part, and the <dfn id="attr-meter-high" title="attr-meter-high"><code>high</code></dfn> attribute specifies
! 1188: the range that is considered to be the "high" part. The <dfn id="attr-meter-optimum" title="attr-meter-optimum"><code>optimum</code></dfn> attribute
! 1189: gives the position that is "optimum"; if that is higher than the
! 1190: "high" value then this indicates that the higher the value, the
! 1191: better; if it's lower than the "low" mark then it indicates that
! 1192: lower values are better, and naturally if it is in between then it
! 1193: indicates that neither high nor low values are good.</p><p>Authoring requirements<code title="attr-meter-value"><a href="#attr-meter-value">value</a></code> attribute must be
! 1194: specified. The <code title="attr-meter-value"><a href="#attr-meter-value">value</a></code>, <code title="attr-meter-min"><a href="#attr-meter-min">min</a></code>, <code title="attr-meter-low"><a href="#attr-meter-low">low</a></code>, <code title="attr-meter-high"><a href="#attr-meter-high">high</a></code>, <code title="attr-meter-max"><a href="#attr-meter-max">max</a></code>, and <code title="attr-meter-optimum"><a href="#attr-meter-optimum">optimum</a></code> attributes, when present,
! 1195: must have values that are <a href="common-microsyntaxes.html#valid-floating-point-number" title="valid floating point
! 1196: number">valid floating point numbers</a>.</p><p>In addition, the attributes' values are further constrained:</p><p>Let <var title="">value</var> be the <code title="attr-meter-value"><a href="#attr-meter-value">value</a></code> attribute's number.</p><p>If the <code title="attr-meter-min"><a href="#attr-meter-min">min</a></code> attribute
! 1197: attribute is specified, then let <var title="">minimum</var> be that
! 1198: attribute's value; otherwise, let it be zero.</p><p>If the <code title="attr-meter-max"><a href="#attr-meter-max">max</a></code> attribute
! 1199: attribute is specified, then let <var title="">maximum</var> be that
! 1200: attribute's value; otherwise, let it be 1.0.</p><p>The following inequalities must hold, as applicable:</p><ul class="brief"><li><var title="">minimum</var> ≤ <var title="">value</var> ≤ <var title="">maximum</var></li>
! 1201: <li><var title="">minimum</var> ≤ <code title="attr-meter-low"><a href="#attr-meter-low">low</a></code> ≤ <var title="">maximum</var> (if <code title="attr-meter-low"><a href="#attr-meter-low">low</a></code> is specified)</li>
! 1202: <li><var title="">minimum</var> ≤ <code title="attr-meter-high"><a href="#attr-meter-high">high</a></code> ≤ <var title="">maximum</var> (if <code title="attr-meter-high"><a href="#attr-meter-high">high</a></code> is specified)</li>
! 1203: <li><var title="">minimum</var> ≤ <code title="attr-meter-optimum"><a href="#attr-meter-optimum">optimum</a></code> ≤ <var title="">maximum</var> (if <code title="attr-meter-optimum"><a href="#attr-meter-optimum">optimum</a></code> is specified)</li>
! 1204: </ul><p>If both the <code title="attr-meter-low"><a href="#attr-meter-low">low</a></code> and <code title="attr-meter-high"><a href="#attr-meter-high">high</a></code> attributes are specified, then
! 1205: the <code title="attr-meter-low"><a href="#attr-meter-low">low</a></code> attribute's value must
! 1206: be less than or equal to the value of the <code title="attr-meter-high"><a href="#attr-meter-high">high</a></code> attribute.</p><p class="note">If no minimum or maximum is specified, then the
! 1207: range is assumed to be 0..1, and the value thus has to be within
! 1208: that range.</p><p>Authors are encouraged to include a textual representation of the
! 1209: gauge's state in the element's contents, for users of user agents
! 1210: that do not support the <code><a href="#the-meter-element">meter</a></code> element.</p><div class="example">
! 1211:
! 1212: <p>The following examples show three gauges that would all be
! 1213: three-quarters full:</p>
! 1214:
! 1215: <pre>Storage space usage: <meter value=6 max=8>6 blocks used (out of 8 total)</meter>
! 1216: Voter turnout: <meter value=0.75><img alt="75%" src="graph75.png"></meter>
! 1217: Tickets sold: <meter min="0" max="100" value="75"></meter></pre>
! 1218:
! 1219: <p>The following example is incorrect use of the element, because
! 1220: it doesn't give a range (and since the default maximum is 1, both
! 1221: of the gauges would end up looking maxed out):</p>
! 1222:
! 1223: <pre class="bad"><p>The grapefruit pie had a radius of <meter value=12>12cm</meter>
! 1224: and a height of <meter value=2>2cm</meter>.</p> <!-- <strong>BAD!</strong> --></pre>
! 1225:
! 1226: <p>Instead, one would either not include the meter element, or use
! 1227: the meter element with a defined range to give the dimensions in
! 1228: context compared to other pies:</p>
! 1229:
! 1230: <pre><p>The grapefruit pie had a radius of 12cm and a height of
! 1231: 2cm.</p>
! 1232: <dl>
! 1233: <dt>Radius: <dd> <meter min=0 max=20 value=12>12cm</meter>
! 1234: <dt>Height: <dd> <meter min=0 max=10 value=2>2cm</meter>
! 1235: </dl></pre>
! 1236:
! 1237: </div><p>There is no explicit way to specify units in the
! 1238: <code><a href="#the-meter-element">meter</a></code> element, but the units may be specified in the
! 1239: <code title="attr-title"><a href="elements.html#the-title-attribute">title</a></code> attribute in free-form text.</p><div class="example">
! 1240:
! 1241: <p>The example above could be extended to mention the units:</p>
! 1242:
! 1243: <pre><dl>
! 1244: <dt>Radius: <dd> <meter min=0 max=20 value=12 title="centimeters">12cm</meter>
! 1245: <dt>Height: <dd> <meter min=0 max=10 value=2 title="centimeters">2cm</meter>
! 1246: </dl></pre>
! 1247:
! 1248: </div><div class="example">
! 1249: <p>The following markup:</p>
! 1250: <pre><h3>Suggested groups</h3>
! 1251: <menu type="toolbar">
! 1252: <a href="?cmd=hsg" onclick="hideSuggestedGroups()">Hide suggested groups</a>
! 1253: </menu>
! 1254: <ul>
! 1255: <li>
! 1256: <p><a href="/group/comp.infosystems.www.authoring.stylesheets/view">comp.infosystems.www.authoring.stylesheets</a> -
! 1257: <a href="/group/comp.infosystems.www.authoring.stylesheets/subscribe">join</a></p>
! 1258: <p>Group description: <strong>Layout/presentation on the WWW.</strong></p>
! 1259: <p><strong><meter value="0.5">Moderate activity,</meter></strong> Usenet, 618 subscribers</p>
! 1260: </li>
! 1261: <li>
! 1262: <p><a href="/group/netscape.public.mozilla.xpinstall/view">netscape.public.mozilla.xpinstall</a> -
! 1263: <a href="/group/netscape.public.mozilla.xpinstall/subscribe">join</a></p>
! 1264: <p>Group description: <strong>Mozilla XPInstall discussion.</strong></p>
! 1265: <p><strong><meter value="0.25">Low activity,</meter></strong> Usenet, 22 subscribers</p>
! 1266: </li>
! 1267: <li>
! 1268: <p><a href="/group/mozilla.dev.general/view">mozilla.dev.general</a> -
! 1269: <a href="/group/mozilla.dev.general/subscribe">join</a></p>
! 1270: <p><strong><meter value="0.25">Low activity,</meter></strong> Usenet, 66 subscribers</p>
! 1271: </li>
! 1272: </ul></pre>
! 1273: <p>Might be rendered as follows:</p>
! 1274: <p><img alt="With the <meter> elements rendered as inline green bars of varying lengths." src="http://dev.w3.org/html5/spec/images/sample-meter.png"></p>
! 1275: </div><p>User agents may<code title="attr-title"><a href="elements.html#the-title-attribute">title</a></code> attribute and the other
! 1276: attributes to provide context-sensitive help or inline text
! 1277: detailing the actual values.</p><div class="example">
! 1278: <p>For example, the following snippet:</p>
! 1279: <pre><meter min=0 max=60 value=23.2 title=seconds></meter></pre>
! 1280: <p>...might cause the user agent to display a gauge with a tooltip
! 1281: saying "Value: 23.2 out of 60." on one line and "seconds" on a
! 1282: second line.</p>
! 1283: </div><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
! 1284: explicitly associate the <code><a href="#the-meter-element">meter</a></code> element with its
! 1285: <a href="association-of-controls-and-forms.html#form-owner">form owner</a>.</p><p><strong>Constraint validation</strong>: <code><a href="#the-meter-element">meter</a></code>
! 1286: elements are always <a href="#barred-from-constraint-validation">barred from constraint
! 1287: validation</a>.</p><div class="example">
! 1288:
! 1289: <p>The following example shows how a gauge could fall back to
! 1290: localized or pretty-printed text.</p>
! 1291:
! 1292: <pre><p>Disk usage: <meter min=0 value=170261928 max=233257824>170 261 928 bytes used
! 1293: out of 233 257 824 bytes available</meter></p></pre>
! 1294:
1.9 mike 1295: </div></body></html>
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