Annotation of html5/spec/the-textarea-element.html, revision 1.157
1.88 mike 1: <!DOCTYPE html>
1.96 mike 2: <html lang="en-US-x-Hixie"><head><title>4.10.13 The textarea 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; }
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34:
35: .bad, .bad *:not(.XXX) { color: gray; border-color: gray; background: transparent; }
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66: h2 { page-break-before: always; }
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189: #configUI input[type=button] { display: block; margin: auto; }
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191: fieldset { margin: 1em; padding: 0.5em 1em; }
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195:
1.114 mike 196: </style><link href="http://www.w3.org/StyleSheets/TR/W3C-ED" rel="stylesheet" type="text/css"><meta content="noindex" name="robots"><style type="text/css">
1.1 mike 197:
198: .applies thead th > * { display: block; }
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204: .matrix, .matrix td { border: hidden; text-align: right; }
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207: .dice-example { border-collapse: collapse; border-style: hidden solid solid hidden; border-width: thin; margin-left: 3em; }
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228: #table-example-1 tbody td:first-child + td + td + td ~ td { width: 1.25em; }
229:
230: .apple-table-examples { border: none; border-collapse: separate; border-spacing: 1.5em 0em; width: 40em; margin-left: 3em; }
231: .apple-table-examples * { font-family: "Times", serif; }
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233: .apple-table-examples tbody th:first-child { border-left: none; width: 100%; }
234: .apple-table-examples thead th:first-child ~ th { font-size: smaller; font-weight: bolder; border-bottom: solid 2px; text-align: center; }
235: .apple-table-examples tbody th::after, .apple-table-examples tfoot th::after { content: leader(". ") }
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238: .apple-table-examples.e1 tbody tr:last-child td { border-bottom: solid 1px; }
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241: .apple-table-examples sup { line-height: 0; }
242:
243: .details-example img { vertical-align: top; }
244:
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254: -webkit-column-width: 6em;
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273: #named-character-references-table > table > tbody > tr > td:first-child + td,
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277:
278: .glyph.control { color: red; }
279:
280: @font-face {
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283: }
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293: }
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299: }
300:
301: </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">
302: function getCookie(name) {
303: var params = location.search.substr(1).split("&");
304: for (var index = 0; index < params.length; index++) {
305: if (params[index] == name)
306: return "1";
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308: if (data[0] == name)
309: return unescape(data[1]);
310: }
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313: var data = cookies[index].split("=");
314: if (data[0] == name)
315: return unescape(data[1]);
316: }
317: return null;
318: }
1.96 mike 319: </script>
1.1 mike 320: <script src="link-fixup.js"></script>
321: <link href="the-option-element.html" title="4.10.12 The option element" rel="prev">
322: <link href="index.html#contents" title="Table of contents" rel="contents">
323: <link href="the-keygen-element.html" title="4.10.14 The keygen element" rel="next">
1.22 mike 324: </head><body onload="fixBrokenLink();" class="split chapter"><div class="head" id="head">
1.1 mike 325: <p><a href="http://www.w3.org/"><img alt="W3C" height="48" src="http://www.w3.org/Icons/w3c_home" width="72"></a></p>
326:
327: <h1>HTML5</h1>
1.157 ! mike 328: <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 1.5696.</p>
1.85 mike 329:
1.157 ! mike 330: <h2 class="no-num no-toc" id="editor-s-draft-26-june-2012">Editor's Draft 26 June 2012</h2>
1.85 mike 331: </div>
1.1 mike 332:
1.85 mike 333: <nav class="prev_next">
1.1 mike 334: <a href="the-option-element.html">← 4.10.12 The option element</a> –
335: <a href="index.html#contents">Table of contents</a> –
336: <a href="the-keygen-element.html">4.10.14 The keygen element →</a>
337: </nav>
338:
1.85 mike 339: <h4 id="the-textarea-element"><span class="secno">4.10.13 </span>The <dfn><code>textarea</code></dfn> element</h4>
340:
341: <dl class="element"><dt><a href="element-definitions.html#element-dfn-categories" title="element-dfn-categories">Categories</a>:</dt>
1.1 mike 342: <dd><a href="content-models.html#flow-content">Flow content</a>.</dd>
343: <dd><a href="content-models.html#phrasing-content">Phrasing content</a>.</dd>
344: <dd><a href="content-models.html#interactive-content">Interactive content</a>.</dd>
345: <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>
346: <dd><a href="content-models.html#palpable-content">Palpable content</a>.</dd>
1.25 mike 347: <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 348: <dd>Where <a href="content-models.html#phrasing-content">phrasing content</a> is expected.</dd>
1.25 mike 349: <dt><a href="element-definitions.html#element-dfn-content-model" title="element-dfn-content-model">Content model</a>:</dt>
1.1 mike 350: <dd><a href="content-models.html#text-content" title="text content">Text</a>.</dd>
1.25 mike 351: <dt><a href="element-definitions.html#element-dfn-attributes" title="element-dfn-attributes">Content attributes</a>:</dt>
1.1 mike 352: <dd><a href="global-attributes.html#global-attributes">Global attributes</a></dd>
353: <dd><code title="attr-fe-autofocus"><a href="attributes-common-to-form-controls.html#attr-fe-autofocus">autofocus</a></code></dd>
354: <dd><code title="attr-textarea-cols"><a href="#attr-textarea-cols">cols</a></code></dd>
355: <dd><code title="attr-textarea-dirname"><a href="#attr-textarea-dirname">dirname</a></code></dd>
356: <dd><code title="attr-fe-disabled"><a href="attributes-common-to-form-controls.html#attr-fe-disabled">disabled</a></code></dd>
357: <dd><code title="attr-fae-form"><a href="association-of-controls-and-forms.html#attr-fae-form">form</a></code></dd>
358: <dd><code title="attr-textarea-maxlength"><a href="#attr-textarea-maxlength">maxlength</a></code></dd>
359: <dd><code title="attr-fe-name"><a href="attributes-common-to-form-controls.html#attr-fe-name">name</a></code></dd>
360: <dd><code title="attr-textarea-placeholder"><a href="#attr-textarea-placeholder">placeholder</a></code></dd>
361: <dd><code title="attr-textarea-readonly"><a href="#attr-textarea-readonly">readonly</a></code></dd>
362: <dd><code title="attr-textarea-required"><a href="#attr-textarea-required">required</a></code></dd>
363: <dd><code title="attr-textarea-rows"><a href="#attr-textarea-rows">rows</a></code></dd>
364: <dd><code title="attr-textarea-wrap"><a href="#attr-textarea-wrap">wrap</a></code></dd>
1.25 mike 365: <dt><a href="element-definitions.html#element-dfn-dom" title="element-dfn-dom">DOM interface</a>:</dt>
1.1 mike 366: <dd>
367: <pre class="idl">interface <dfn id="htmltextareaelement">HTMLTextAreaElement</dfn> : <a href="elements.html#htmlelement">HTMLElement</a> {
368: attribute boolean <a href="attributes-common-to-form-controls.html#dom-fe-autofocus" title="dom-fe-autofocus">autofocus</a>;
369: attribute unsigned long <a href="#dom-textarea-cols" title="dom-textarea-cols">cols</a>;
370: attribute DOMString <a href="#dom-textarea-dirname" title="dom-textarea-dirName">dirName</a>;
371: attribute boolean <a href="attributes-common-to-form-controls.html#dom-fe-disabled" title="dom-fe-disabled">disabled</a>;
372: 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>;
373: attribute long <a href="#dom-textarea-maxlength" title="dom-textarea-maxLength">maxLength</a>;
374: attribute DOMString <a href="attributes-common-to-form-controls.html#dom-fe-name" title="dom-fe-name">name</a>;
375: attribute DOMString <a href="#dom-textarea-placeholder" title="dom-textarea-placeholder">placeholder</a>;
376: attribute boolean <a href="#dom-textarea-readonly" title="dom-textarea-readOnly">readOnly</a>;
377: attribute boolean <a href="#dom-textarea-required" title="dom-textarea-required">required</a>;
378: attribute unsigned long <a href="#dom-textarea-rows" title="dom-textarea-rows">rows</a>;
379: attribute DOMString <a href="#dom-textarea-wrap" title="dom-textarea-wrap">wrap</a>;
380:
381: readonly attribute DOMString <a href="#dom-textarea-type" title="dom-textarea-type">type</a>;
382: attribute DOMString <a href="#dom-textarea-defaultvalue" title="dom-textarea-defaultValue">defaultValue</a>;
383: attribute DOMString <a href="#dom-textarea-value" title="dom-textarea-value">value</a>;
384: readonly attribute unsigned long <a href="#dom-textarea-textlength" title="dom-textarea-textLength">textLength</a>;
385:
386: readonly attribute boolean <a href="constraints.html#dom-cva-willvalidate" title="dom-cva-willValidate">willValidate</a>;
387: readonly attribute <a href="constraints.html#validitystate">ValidityState</a> <a href="constraints.html#dom-cva-validity" title="dom-cva-validity">validity</a>;
388: readonly attribute DOMString <a href="constraints.html#dom-cva-validationmessage" title="dom-cva-validationMessage">validationMessage</a>;
389: boolean <a href="constraints.html#dom-cva-checkvalidatity" title="dom-cva-checkValidatity">checkValidity</a>();
390: void <a href="constraints.html#dom-cva-setcustomvalidity" title="dom-cva-setCustomValidity">setCustomValidity</a>(DOMString error);
391:
392: readonly attribute <a href="infrastructure.html#nodelist">NodeList</a> <a href="the-label-element.html#dom-lfe-labels" title="dom-lfe-labels">labels</a>;
393:
394: void <a href="textFieldSelection.html#dom-textarea-input-select" title="dom-textarea/input-select">select</a>();
395: attribute unsigned long <a href="textFieldSelection.html#dom-textarea-input-selectionstart" title="dom-textarea/input-selectionStart">selectionStart</a>;
396: attribute unsigned long <a href="textFieldSelection.html#dom-textarea-input-selectionend" title="dom-textarea/input-selectionEnd">selectionEnd</a>;
397: attribute DOMString <a href="textFieldSelection.html#dom-textarea-input-selectiondirection" title="dom-textarea/input-selectionDirection">selectionDirection</a>;
398: void <a href="textFieldSelection.html#dom-textarea-input-setselectionrange" title="dom-textarea/input-setSelectionRange">setSelectionRange</a>(unsigned long start, unsigned long end, optional DOMString direction);
399: };</pre>
400: </dd>
401: </dl><p>The <code><a href="#the-textarea-element">textarea</a></code> element <a href="rendering.html#represents">represents</a> a
402: multiline plain text edit control<span class="impl"> for the
403: element's <dfn id="concept-textarea-raw-value" title="concept-textarea-raw-value">raw
404: value</dfn></span>. The contents of the control represent the
1.85 mike 405: control's default value.</p>
406:
407: <div class="impl">
1.1 mike 408:
409: <p>The <a href="#concept-textarea-raw-value" title="concept-textarea-raw-value">raw value</a> of
410: a <code><a href="#the-textarea-element">textarea</a></code> control must be initially the empty
411: string.</p>
412:
413: <p>A newline in a <code><a href="#the-textarea-element">textarea</a></code> element, and in its <a href="#concept-textarea-raw-value" title="concept-textarea-raw-value">raw value</a>, should separate
414: paragraphs for the purposes of the Unicode bidirectional algorithm.
415: This requirement may be implemented indirectly through the style
416: layer. For example, an HTML+CSS user agent could implement these
417: requirements by implementing the CSS 'unicode-bidi' property. <a href="references.html#refsBIDI">[BIDI]</a> <a href="references.html#refsCSS">[CSS]</a></p>
418:
1.85 mike 419: </div>
420:
421: <p>The <dfn id="attr-textarea-readonly" title="attr-textarea-readonly"><code>readonly</code></dfn> attribute
1.1 mike 422: is a <a href="common-microsyntaxes.html#boolean-attribute">boolean attribute</a> used to control whether the text
1.85 mike 423: can be edited by the user or not.</p>
424:
425: <div class="impl">
1.1 mike 426:
427: <p><strong>Constraint validation</strong>: If the <code title="attr-textarea-readonly"><a href="#attr-textarea-readonly">readonly</a></code> attribute is
428: specified on a <code><a href="#the-textarea-element">textarea</a></code> element, the element is
429: <a href="constraints.html#barred-from-constraint-validation">barred from constraint validation</a>.</p>
430:
431: <p>A <code><a href="#the-textarea-element">textarea</a></code> element is <dfn id="concept-textarea-mutable" title="concept-textarea-mutable">mutable</dfn> if it is neither
432: <a href="attributes-common-to-form-controls.html#concept-fe-disabled" title="concept-fe-disabled">disabled</a> nor has a <code title="attr-textarea-readonly"><a href="#attr-textarea-readonly">readonly</a></code> attribute
433: specified.</p>
434:
435: <p>When a <code><a href="#the-textarea-element">textarea</a></code> is <a href="#concept-textarea-mutable" title="concept-textarea-mutable">mutable</a>, its <a href="#concept-textarea-raw-value" title="concept-textarea-raw-value">raw value</a> should be
436: editable by the user: the user agent should allow the user to edit,
437: insert, and remove text, and to insert and remove line breaks in the
1.85 mike 438: form of "LF" (U+000A) characters. Any time the user causes
1.1 mike 439: the element's <a href="#concept-textarea-raw-value" title="concept-textarea-raw-value">raw
440: value</a> to change, the user agent must <a href="webappapis.html#queue-a-task">queue a
441: task</a> to <a href="webappapis.html#fire-a-simple-event">fire a simple event</a> that bubbles named
442: <code title="event-input">input</code> at the <code><a href="#the-textarea-element">textarea</a></code>
443: element. User agents may wait for a suitable break in the user's
444: interaction before queuing the task; for example, a user agent could
445: wait for the user to have not hit a key for 100ms, so as to only
446: fire the event when the user pauses, instead of continuously for
447: each keystroke.</p>
1.4 mike 448:
1.1 mike 449: <p>A <code><a href="#the-textarea-element">textarea</a></code> element has a <dfn id="concept-textarea-dirty" title="concept-textarea-dirty">dirty value flag</dfn>, which must be
450: initially set to false, and must be set to true whenever the user
451: interacts with the control in a way that changes the <a href="#concept-textarea-raw-value" title="concept-textarea-raw-value">raw value</a>.</p>
452:
453: <p>When the <code><a href="#the-textarea-element">textarea</a></code> element's <code><a href="infrastructure.html#textcontent">textContent</a></code>
454: IDL attribute changes value, if the element's <a href="#concept-textarea-dirty" title="concept-textarea-dirty">dirty value flag</a> is false,
455: then the element's <a href="#concept-textarea-raw-value" title="concept-textarea-raw-value">raw
456: value</a> must be set to the value of the element's
457: <code><a href="infrastructure.html#textcontent">textContent</a></code> IDL attribute.</p>
458:
459: <p>The <a href="form-submission.html#concept-form-reset-control" title="concept-form-reset-control">reset
460: algorithm</a> for <code><a href="#the-textarea-element">textarea</a></code> elements is to set the
461: element's <a href="#concept-textarea-raw-value" title="concept-textarea-raw-value">value</a> to
462: the value of the element's <code><a href="infrastructure.html#textcontent">textContent</a></code> IDL
463: attribute.</p>
464:
465:
466:
467: <p>If the element is <a href="#concept-textarea-mutable" title="concept-textarea-mutable">mutable</a>, the user agent
468: should allow the user to change the writing direction of the
469: element, setting it either to a left-to-right writing direction or a
470: right-to-left writing direction. If the user does so, the user agent
471: must then run the following steps:</p>
472:
473: <ol><li><p>Set the element's <code title="attr-dir"><a href="global-attributes.html#the-dir-attribute">dir</a></code>
474: attribute to "<code title="attr-dir-ltr"><a href="global-attributes.html#attr-dir-ltr">ltr</a></code>" if the user
475: selected a left-to-right writing direction, and "<code title="attr-dir-rtl"><a href="global-attributes.html#attr-dir-rtl">rtl</a></code>" if the user selected a
476: right-to-left writing direction.</p></li>
477:
478: <li><p><a href="webappapis.html#queue-a-task">Queue a task</a> to <a href="webappapis.html#fire-a-simple-event">fire a simple
479: event</a> that bubbles named <code title="event-input">input</code> at the <code><a href="#the-textarea-element">textarea</a></code>
480: element.</p></li>
481:
1.85 mike 482: </ol></div>
483:
484: <p>The <dfn id="attr-textarea-cols" title="attr-textarea-cols"><code>cols</code></dfn>
1.1 mike 485: attribute specifies the expected maximum number of characters per
486: line. If the <code title="attr-textarea-cols"><a href="#attr-textarea-cols">cols</a></code> attribute
487: is specified, its value must be a <a href="common-microsyntaxes.html#valid-non-negative-integer">valid non-negative
488: integer</a> greater than zero. <span class="impl">If applying the
489: <a href="common-microsyntaxes.html#rules-for-parsing-non-negative-integers">rules for parsing non-negative integers</a> to the
490: attribute's value results in a number greater than zero, then the
491: element's <dfn id="attr-textarea-cols-value" title="attr-textarea-cols-value">character
1.85 mike 492: width</dfn> is that value; otherwise, it is 20.</span></p>
493:
494: <div class="impl">
1.1 mike 495:
496: <p>The user agent may use the <code><a href="#the-textarea-element">textarea</a></code> element's <a href="#attr-textarea-cols-value" title="attr-textarea-cols-value">character width</a> as a hint to
497: the user as to how many characters the server prefers per line
498: (e.g. for visual user agents by making the width of the control be
499: that many characters). In visual renderings, the user agent should
500: wrap the user's input in the rendering so that each line is no wider
501: than this number of characters.</p>
502:
1.85 mike 503: </div>
504:
505: <p>The <dfn id="attr-textarea-rows" title="attr-textarea-rows"><code>rows</code></dfn>
1.1 mike 506: 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
507: value must be a <a href="common-microsyntaxes.html#valid-non-negative-integer">valid non-negative integer</a> greater than
508: zero. <span class="impl">If applying the <a href="common-microsyntaxes.html#rules-for-parsing-non-negative-integers">rules for parsing
509: non-negative integers</a> to the attribute's value results in a
510: number greater than zero, then the element's <dfn id="attr-textarea-rows-value" title="attr-textarea-rows-value">character height</dfn> is that
1.85 mike 511: value; otherwise, it is 2.</span></p>
512:
513: <div class="impl">
1.1 mike 514:
515: <p>Visual user agents should set the height of the control to the
516: number of lines given by <a href="#attr-textarea-rows-value" title="attr-textarea-rows-value">character height</a>.</p>
517:
1.85 mike 518: </div>
519:
520: <p>The <dfn id="attr-textarea-wrap" title="attr-textarea-wrap"><code>wrap</code></dfn>
1.1 mike 521: attribute is an <a href="common-microsyntaxes.html#enumerated-attribute">enumerated attribute</a> with two keywords
522: and states: the <dfn id="attr-textarea-wrap-soft" title="attr-textarea-wrap-soft"><code>soft</code></dfn> keyword
523: which maps to the <a href="#attr-textarea-wrap-soft-state" title="attr-textarea-wrap-soft-state">Soft</a> state, and the
524: <dfn id="attr-textarea-wrap-hard" title="attr-textarea-wrap-hard"><code>hard</code></dfn> keyword
525: which maps to the <a href="#attr-textarea-wrap-hard-state" title="attr-textarea-wrap-hard-state">Hard</a> state. The
1.85 mike 526: <i>missing value default</i> is the <a href="#attr-textarea-wrap-soft-state" title="attr-textarea-wrap-soft-state">Soft</a> state.</p>
527:
528: <p>The <dfn id="attr-textarea-wrap-soft-state" title="attr-textarea-wrap-soft-state">Soft</dfn> state
1.1 mike 529: indicates that the text in the <code><a href="#the-textarea-element">textarea</a></code> is not to be
530: wrapped when it is submitted (though it can still be wrapped in the
1.85 mike 531: rendering).</p>
532:
533: <p>The <dfn id="attr-textarea-wrap-hard-state" title="attr-textarea-wrap-hard-state">Hard</dfn> state
1.1 mike 534: indicates that the text in the <code><a href="#the-textarea-element">textarea</a></code> is to have
535: newlines added by the user agent so that the text is wrapped when it
1.85 mike 536: is submitted.</p>
537:
538: <p>If the element's <code title="attr-textarea-wrap"><a href="#attr-textarea-wrap">wrap</a></code>
1.1 mike 539: 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
1.85 mike 540: specified.</p>
541:
542:
543:
544: <div class="impl">
1.1 mike 545:
546: <p>For historical reasons, the element's value is normalised in
547: three different ways for three different purposes. The <a href="#concept-textarea-raw-value" title="concept-textarea-raw-value">raw value</a> is the value as
548: it was originally set. It is not normalized. The <a href="#concept-textarea-api-value" title="concept-textarea-api-value">API value</a> is the value
549: used in the <code title="dom-textarea-value"><a href="#dom-textarea-value">value</a></code> IDL
1.85 mike 550: attribute. It is normalized so that line breaks use "LF" (U+000A) characters. Finally, there is the form submission <a href="attributes-common-to-form-controls.html#concept-fe-value" title="concept-fe-value">value</a>. It is normalized so that line
1.1 mike 551: breaks use U+000D CARRIAGE RETURN U+000A LINE FEED (CRLF) character
552: pairs, and in addition, if necessary given the element's <code title="attr-textarea-wrap"><a href="#attr-textarea-wrap">wrap</a></code> attribute, additional line
553: breaks are inserted to wrap the text at the given width.</p>
554:
555: <p>The element's <dfn id="concept-textarea-api-value" title="concept-textarea-api-value">API
556: value</dfn> is defined to be the element's <a href="#concept-textarea-raw-value" title="concept-textarea-raw-value">raw value</a> with the
557: following transformation applied:</p>
558:
559: <ol><li><p>Replace every U+000D CARRIAGE RETURN U+000A LINE FEED (CRLF)
560: character pair from the <a href="#concept-textarea-raw-value" title="concept-textarea-raw-value">raw value</a> with a single
561: U+000A LINE FEED (CRLF) character.</p></li>
562:
563: <li><p>Replace every remaining U+000D CARRIAGE RETURN character from
564: the <a href="#concept-textarea-raw-value" title="concept-textarea-raw-value">raw value</a> with
565: a single U+000A LINE FEED (CRLF) character.</p></li>
566:
567: </ol><p>The element's <a href="attributes-common-to-form-controls.html#concept-fe-value" title="concept-fe-value">value</a> is
568: defined to be the element's <a href="#concept-textarea-raw-value" title="concept-textarea-raw-value">raw value</a> with the
569: following transformation applied:</p>
570:
1.85 mike 571: <ol><li><p>Replace every occurrence of a "CR" (U+000D)
572: character not followed by a "LF" (U+000A) character, and
573: every occurrence of a "LF" (U+000A) character not preceded
574: by a "CR" (U+000D) character, by a two-character
1.1 mike 575: string consisting of a U+000D CARRIAGE RETURN U+000A LINE FEED
576: (CRLF) character pair.</p></li>
577:
578: <li><p>If the element's <code title="attr-textarea-wrap"><a href="#attr-textarea-wrap">wrap</a></code> attribute is in the <a href="#attr-textarea-wrap-hard-state" title="attr-textarea-wrap-hard-state">Hard</a> state, insert
579: U+000D CARRIAGE RETURN U+000A LINE FEED (CRLF) character pairs
580: into the string using a UA-defined algorithm so that each line has
581: no more than <a href="#attr-textarea-cols-value" title="attr-textarea-cols-value">character
582: width</a> characters. For the purposes of this requirement,
583: lines are delimited by the start of the string, the end of the
584: string, and U+000D CARRIAGE RETURN U+000A LINE FEED (CRLF)
585: character pairs.</p></li>
586:
1.85 mike 587: </ol></div>
588:
589: <p>The <dfn id="attr-textarea-maxlength" title="attr-textarea-maxlength"><code>maxlength</code></dfn>
1.1 mike 590: attribute is a <a href="attributes-common-to-form-controls.html#attr-fe-maxlength" title="attr-fe-maxlength">form control <code title="">maxlength</code> attribute</a> controlled by the
1.85 mike 591: <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>
592:
593: <p>If the <code><a href="#the-textarea-element">textarea</a></code> element has a <a href="attributes-common-to-form-controls.html#maximum-allowed-value-length">maximum allowed
1.1 mike 594: value length</a>, then the element's children must be such that
1.125 mike 595: the <a href="infrastructure.html#code-unit-length">code-unit length</a> of the value of the element's
1.1 mike 596: <code><a href="infrastructure.html#textcontent">textContent</a></code> IDL attribute is equal to or less than the
1.85 mike 597: element's <a href="attributes-common-to-form-controls.html#maximum-allowed-value-length">maximum allowed value length</a>.</p>
598:
599: <p>The <dfn id="attr-textarea-required" title="attr-textarea-required"><code>required</code></dfn> attribute
1.1 mike 600: is a <a href="common-microsyntaxes.html#boolean-attribute">boolean attribute</a>. When specified, the user will
1.85 mike 601: be required to enter a value before submitting the form.</p>
602:
603: <div class="impl">
1.1 mike 604:
605: <p><strong>Constraint validation</strong>: If the element has its
606: <code title="attr-textarea-required"><a href="#attr-textarea-required">required</a></code> attribute
607: specified, and the element is <a href="#concept-textarea-mutable" title="concept-textarea-mutable">mutable</a>, and the element's
608: <a href="attributes-common-to-form-controls.html#concept-fe-value" title="concept-fe-value">value</a> is the empty string,
609: then the element is <a href="constraints.html#suffering-from-being-missing">suffering from being missing</a>.</p>
610:
1.85 mike 611: </div>
612:
613:
614:
615:
616: <p>The <dfn id="attr-textarea-placeholder" title="attr-textarea-placeholder"><code>placeholder</code></dfn>
1.1 mike 617: attribute represents a hint (a word or short phrase) intended to aid
618: the user with data entry. A hint could be a sample value or a brief
619: description of the expected format. The attribute, if specified,
1.85 mike 620: must have a value that contains no "LF" (U+000A) or "CR" (U+000D) characters.</p>
621:
622: <p class="note">For a longer hint or other advisory text, the <code title="attr-title"><a href="global-attributes.html#the-title-attribute">title</a></code> attribute is more appropriate.</p>
623:
624: <p>The <code title="attr-textarea-placeholder"><a href="#attr-textarea-placeholder">placeholder</a></code>
1.1 mike 625: attribute should not be used as an alternative to a
1.85 mike 626: <code><a href="the-label-element.html#the-label-element">label</a></code>.</p>
627:
628: <div class="impl">
1.1 mike 629:
630: <p>User agents should present this hint to the user, after having
631: <a href="common-microsyntaxes.html#strip-line-breaks" title="strip line breaks">stripped line breaks</a> from it,
632: when the element's <a href="attributes-common-to-form-controls.html#concept-fe-value" title="concept-fe-value">value</a> is
633: the empty string and the control is not focused (e.g. by displaying
634: it inside a blank unfocused control).</p>
635:
1.85 mike 636: </div>
637:
638: <p>The <dfn id="attr-textarea-dirname" title="attr-textarea-dirname"><code>dirname</code></dfn>
1.1 mike 639: attribute is a <a href="attributes-common-to-form-controls.html#form-control-dirname-attribute">form control <code title="">dirname</code>
1.85 mike 640: attribute</a>.</p>
641:
642: <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 643: explicitly associate the <code><a href="#the-textarea-element">textarea</a></code> element with its
644: <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>
645: 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
646: the control non-interactive and to prevent its value from being
647: submitted. The <code title="attr-fe-autofocus"><a href="attributes-common-to-form-controls.html#attr-fe-autofocus">autofocus</a></code>
1.85 mike 648: attribute controls focus.</p>
649:
650:
651: <dl class="domintro"><dt><var title="">textarea</var> . <code title="attr-textarea-type">type</code></dt>
1.1 mike 652:
653: <dd>
654:
655: <p>Returns the string "<code title="">textarea</code>".</p>
656:
657: </dd>
658:
659: <dt><var title="">textarea</var> . <code title="attr-textarea-value">value</code></dt>
660:
661: <dd>
662:
663: <p>Returns the current value of the element.</p>
664:
665: <p>Can be set, to change the value.</p>
666:
667: </dd>
668:
669: </dl><div class="impl">
670:
671: <p>The <dfn id="dom-textarea-cols" title="dom-textarea-cols"><code>cols</code></dfn>, <dfn id="dom-textarea-placeholder" title="dom-textarea-placeholder"><code>placeholder</code></dfn>,
672: <dfn id="dom-textarea-required" title="dom-textarea-required"><code>required</code></dfn>, <dfn id="dom-textarea-rows" title="dom-textarea-rows"><code>rows</code></dfn>, and <dfn id="dom-textarea-wrap" title="dom-textarea-wrap"><code>wrap</code></dfn> attributes must
673: <a href="common-dom-interfaces.html#reflect">reflect</a> the respective content attributes of the same
674: name. The <code title="dom-textarea-cols"><a href="#dom-textarea-cols">cols</a></code> and <code title="dom-textarea-rows"><a href="#dom-textarea-rows">rows</a></code> attributes are <a href="common-dom-interfaces.html#limited-to-only-non-negative-numbers-greater-than-zero">limited
675: to only non-negative numbers greater than zero</a>. The <code title="dom-textarea-cols"><a href="#dom-textarea-cols">cols</a></code> attribute's default value is
676: 20. The <code title="dom-textarea-rows"><a href="#dom-textarea-rows">rows</a></code> attribute's
677: default value is 2. The <dfn id="dom-textarea-dirname" title="dom-textarea-dirName"><code>dirName</code></dfn> IDL
678: attribute must <a href="common-dom-interfaces.html#reflect">reflect</a> the <code title="attr-textarea-dirname"><a href="#attr-textarea-dirname">dirname</a></code> content attribute. The
679: <dfn id="dom-textarea-maxlength" title="dom-textarea-maxLength"><code>maxLength</code></dfn> IDL
680: attribute must <a href="common-dom-interfaces.html#reflect">reflect</a> the <code title="attr-textarea-maxlength"><a href="#attr-textarea-maxlength">maxlength</a></code> content attribute,
681: <a href="common-dom-interfaces.html#limited-to-only-non-negative-numbers">limited to only non-negative numbers</a>. The <dfn id="dom-textarea-readonly" title="dom-textarea-readOnly"><code>readOnly</code></dfn> IDL
682: attribute must <a href="common-dom-interfaces.html#reflect">reflect</a> the <code title="attr-textarea-readonly"><a href="#attr-textarea-readonly">readonly</a></code> content
683: attribute.</p>
684:
685: <p>The <dfn id="dom-textarea-type" title="dom-textarea-type"><code>type</code></dfn> IDL
686: attribute must return the value "<code title="">textarea</code>".</p>
687:
688: <p>The <dfn id="dom-textarea-defaultvalue" title="dom-textarea-defaultValue"><code>defaultValue</code></dfn>
689: IDL attribute must act like the element's <code><a href="infrastructure.html#textcontent">textContent</a></code>
690: IDL attribute.</p>
691:
692: <p>The <dfn id="dom-textarea-value" title="dom-textarea-value"><code>value</code></dfn>
693: attribute must, on getting, return the element's <a href="#concept-textarea-api-value" title="concept-textarea-api-value">API value</a>; on setting, it
694: must set the element's <a href="#concept-textarea-raw-value" title="concept-textarea-raw-value">raw
695: value</a> to the new value, set the element's <a href="#concept-textarea-dirty" title="concept-textarea-dirty">dirty value flag</a> to true, and
696: should then move the text entry cursor position to the end of the
697: text field, unselecting any selected text and resetting the
698: selection direction to <i>none</i>.</p>
699:
700: <p>The <dfn id="dom-textarea-textlength" title="dom-textarea-textLength"><code>textLength</code></dfn> IDL
1.125 mike 701: attribute must return the <a href="infrastructure.html#code-unit-length">code-unit length</a> of the
1.1 mike 702: element's <a href="#concept-textarea-api-value" title="concept-textarea-api-value">API
703: value</a>.</p>
704:
705: <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>
706: 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>
707: methods, are part of the <a href="constraints.html#the-constraint-validation-api">constraint validation API</a>. The
708: <code title="dom-lfe-labels"><a href="the-label-element.html#dom-lfe-labels">labels</a></code> attribute provides a list
709: of the element's <code><a href="the-label-element.html#the-label-element">label</a></code>s. The <code title="dom-textarea/input-select"><a href="textFieldSelection.html#dom-textarea-input-select">select()</a></code>, <code title="dom-textarea/input-selectionStart"><a href="textFieldSelection.html#dom-textarea-input-selectionstart">selectionStart</a></code>,
710: <code title="dom-textarea/input-selectionEnd"><a href="textFieldSelection.html#dom-textarea-input-selectionend">selectionEnd</a></code>,
711: <code title="dom-textarea/input-selectionDirection"><a href="textFieldSelection.html#dom-textarea-input-selectiondirection">selectionDirection</a></code>,
712: and <code title="dom-textarea/input-setSelectionRange"><a href="textFieldSelection.html#dom-textarea-input-setselectionrange">setSelectionRange()</a></code>
713: methods and attributes expose the element's text selection. The
714: <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
715: element's forms API.</p>
716:
1.85 mike 717: </div>
718:
719:
720: <div class="example">
1.1 mike 721:
722: <p>Here is an example of a <code><a href="#the-textarea-element">textarea</a></code> being used for
723: unrestricted free-form text input in a form:</p>
724:
725: <pre><p>If you have any comments, please let us know: <textarea cols=80 name=comments></textarea></p></pre>
726:
727: <p>To specify a maximum length for the comments, one can use
728: the <code title="attr-textarea-maxlength"><a href="#attr-textarea-maxlength">maxlength</a></code>
729: attribute:</p>
730:
731: <pre><p>If you have any short comments, please let us know: <textarea cols=80 name=comments maxlength=200></textarea></p></pre>
732:
733: <p>To give a default value, text can be included inside the element:</p>
734:
735: <pre><p>If you have any comments, please let us know: <textarea cols=80 name=comments>You rock!</textarea></p></pre>
736:
737: <p>To have the browser submit <a href="global-attributes.html#the-directionality">the directionality</a> of
738: the element along with the value, the <code title="attr-textarea-dirname"><a href="#attr-textarea-dirname">dirname</a></code> attribute can be
739: specified:</p>
740:
741: <pre><p>If you have any comments, please let us know (you may use either English or Hebrew for your comments):
742: <textarea cols=80 name=comments dirname=comments.dir></textarea></p></pre>
743:
1.85 mike 744: </div>
745:
746:
747:
748: </body></html>
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