Annotation of html5/spec-author-view/the-noscript-element.html, revision 1.112
1.98 mike 1: <!doctype html>
1.100 mike 2: <html lang="en-US-x-Hixie"><meta content="text/html; charset=utf-8" http-equiv="Content-Type"><title>4.3.2 The noscript element — HTML5: Edition for Web Authors</title><link href="whatwg.css" rel="stylesheet"><style type="text/css">
1.1 mike 3: pre { margin-left: 2em; white-space: pre-wrap; }
4: h2 { margin: 3em 0 1em 0; }
5: h3 { margin: 2.5em 0 1em 0; }
6: h4 { margin: 2.5em 0 0.75em 0; }
7: h5, h6 { margin: 2.5em 0 1em; }
8: h1 + h2, h1 + h2 + h2 { margin: 0.75em 0 0.75em; }
9: h2 + h3, h3 + h4, h4 + h5, h5 + h6 { margin-top: 0.5em; }
10: p { margin: 1em 0; }
11: hr:not(.top) { display: block; background: none; border: none; padding: 0; margin: 2em 0; height: auto; }
12: dl, dd { margin-top: 0; margin-bottom: 0; }
13: dt { margin-top: 0.75em; margin-bottom: 0.25em; clear: left; }
14: dt + dt { margin-top: 0; }
15: dd dt { margin-top: 0.25em; margin-bottom: 0; }
16: dd p { margin-top: 0; }
17: dd dl + p { margin-top: 1em; }
18: dd table + p { margin-top: 1em; }
19: p + * > li, dd li { margin: 1em 0; }
20: dt, dfn { font-weight: bold; font-style: normal; }
1.103 mike 21: i, em { font-style: italic; }
1.1 mike 22: dt dfn { font-style: italic; }
23: pre, code { font-size: inherit; font-family: monospace; font-variant: normal; }
24: pre strong { color: black; font: inherit; font-weight: bold; background: yellow; }
25: pre em { font-weight: bolder; font-style: normal; }
26: @media screen { code { color: orangered; } code :link, code :visited { color: inherit; } }
27: var sub { vertical-align: bottom; font-size: smaller; position: relative; top: 0.1em; }
28: table { border-collapse: collapse; border-style: hidden hidden none hidden; }
29: table thead, table tbody { border-bottom: solid; }
30: table tbody th:first-child { border-left: solid; }
31: table tbody th { text-align: left; }
32: table td, table th { border-left: solid; border-right: solid; border-bottom: solid thin; vertical-align: top; padding: 0.2em; }
33: blockquote { margin: 0 0 0 2em; border: 0; padding: 0; font-style: italic; }
34:
35: .bad, .bad *:not(.XXX) { color: gray; border-color: gray; background: transparent; }
36: .matrix, .matrix td { border: none; text-align: right; }
37: .matrix { margin-left: 2em; }
38: .dice-example { border-collapse: collapse; border-style: hidden solid solid hidden; border-width: thin; margin-left: 3em; }
39: .dice-example caption { width: 30em; font-size: smaller; font-style: italic; padding: 0.75em 0; text-align: left; }
40: .dice-example td, .dice-example th { border: solid thin; width: 1.35em; height: 1.05em; text-align: center; padding: 0; }
41:
42: .toc dfn, h1 dfn, h2 dfn, h3 dfn, h4 dfn, h5 dfn, h6 dfn { font: inherit; }
1.107 mike 43: img.extra, p.overview { float: right; }
1.106 mike 44: pre.idl { border: solid thin; background: #EEEEEE; color: black; padding: 0.5em 1em; position: relative; }
1.1 mike 45: pre.idl :link, pre.idl :visited { color: inherit; background: transparent; }
1.106 mike 46: pre.idl::before { content: "IDL"; font: bold small sans-serif; padding: 0.5em; background: white; position: absolute; top: 0; margin: -1px 0 0 -4em; width: 1.5em; border: thin solid; border-radius: 0 0 0 0.5em }
1.1 mike 47: pre.css { border: solid thin; background: #FFFFEE; color: black; padding: 0.5em 1em; }
48: pre.css:first-line { color: #AAAA50; }
49: dl.domintro { color: green; margin: 2em 0 2em 2em; padding: 0.5em 1em; border: none; background: #DDFFDD; }
50: hr + dl.domintro, div.impl + dl.domintro { margin-top: 2.5em; margin-bottom: 1.5em; }
51: dl.domintro dt, dl.domintro dt * { color: black; text-decoration: none; }
52: dl.domintro dd { margin: 0.5em 0 1em 2em; padding: 0; }
53: dl.domintro dd p { margin: 0.5em 0; }
54: dl.switch { padding-left: 2em; }
55: dl.switch > dt { text-indent: -1.5em; }
56: dl.switch > dt:before { content: '\21AA'; padding: 0 0.5em 0 0; display: inline-block; width: 1em; text-align: right; line-height: 0.5em; }
57: dl.triple { padding: 0 0 0 1em; }
58: dl.triple dt, dl.triple dd { margin: 0; display: inline }
59: dl.triple dt:after { content: ':'; }
60: dl.triple dd:after { content: '\A'; white-space: pre; }
61: .diff-old { text-decoration: line-through; color: silver; background: transparent; }
62: .diff-chg, .diff-new { text-decoration: underline; color: green; background: transparent; }
63: a .diff-new { border-bottom: 1px blue solid; }
64:
65: h2 { page-break-before: always; }
66: h1, h2, h3, h4, h5, h6 { page-break-after: avoid; }
67: h1 + h2, hr + h2.no-toc { page-break-before: auto; }
68:
69: p > span:not([title=""]):not([class="XXX"]):not([class="impl"]):not([class="note"]),
70: li > span:not([title=""]):not([class="XXX"]):not([class="impl"]):not([class="note"]), { border-bottom: solid #9999CC; }
71:
72: div.head { margin: 0 0 1em; padding: 1em 0 0 0; }
73: div.head p { margin: 0; }
74: div.head h1 { margin: 0; }
75: div.head .logo { float: right; margin: 0 1em; }
76: div.head .logo img { border: none } /* remove border from top image */
77: div.head dl { margin: 1em 0; }
78: div.head p.copyright, div.head p.alt { font-size: x-small; font-style: oblique; margin: 0; }
79:
80: body > .toc > li { margin-top: 1em; margin-bottom: 1em; }
81: body > .toc.brief > li { margin-top: 0.35em; margin-bottom: 0.35em; }
82: body > .toc > li > * { margin-bottom: 0.5em; }
83: body > .toc > li > * > li > * { margin-bottom: 0.25em; }
84: .toc, .toc li { list-style: none; }
85:
86: .brief { margin-top: 1em; margin-bottom: 1em; line-height: 1.1; }
87: .brief li { margin: 0; padding: 0; }
88: .brief li p { margin: 0; padding: 0; }
89:
90: .category-list { margin-top: -0.75em; margin-bottom: 1em; line-height: 1.5; }
91: .category-list::before { content: '\21D2\A0'; font-size: 1.2em; font-weight: 900; }
92: .category-list li { display: inline; }
93: .category-list li:not(:last-child)::after { content: ', '; }
94: .category-list li > span, .category-list li > a { text-transform: lowercase; }
95: .category-list li * { text-transform: none; } /* don't affect <code> nested in <a> */
96:
97: .XXX { color: #E50000; background: white; border: solid red; padding: 0.5em; margin: 1em 0; }
98: .XXX > :first-child { margin-top: 0; }
99: p .XXX { line-height: 3em; }
100: .annotation { border: solid thin black; background: #0C479D; color: white; position: relative; margin: 8px 0 20px 0; }
101: .annotation:before { position: absolute; left: 0; top: 0; width: 100%; height: 100%; margin: 6px -6px -6px 6px; background: #333333; z-index: -1; content: ''; }
102: .annotation :link, .annotation :visited { color: inherit; }
103: .annotation :link:hover, .annotation :visited:hover { background: transparent; }
104: .annotation span { border: none ! important; }
105: .note { color: green; background: transparent; font-family: sans-serif; }
106: .warning { color: red; background: transparent; }
107: .note, .warning { font-weight: bolder; font-style: italic; }
1.103 mike 108: .note em, .warning em, .note i, .warning i { font-style: normal; }
1.1 mike 109: p.note, div.note { padding: 0.5em 2em; }
110: span.note { padding: 0 2em; }
111: .note p:first-child, .warning p:first-child { margin-top: 0; }
112: .note p:last-child, .warning p:last-child { margin-bottom: 0; }
113: .warning:before { font-style: normal; }
114: p.note:before { content: 'Note: '; }
115: p.warning:before { content: '\26A0 Warning! '; }
116:
117: .bookkeeping:before { display: block; content: 'Bookkeeping details'; font-weight: bolder; font-style: italic; }
118: .bookkeeping { font-size: 0.8em; margin: 2em 0; }
119: .bookkeeping p { margin: 0.5em 2em; display: list-item; list-style: square; }
120: .bookkeeping dt { margin: 0.5em 2em 0; }
121: .bookkeeping dd { margin: 0 3em 0.5em; }
122:
123: h4 { position: relative; z-index: 3; }
124: h4 + .element, h4 + div + .element { margin-top: -2.5em; padding-top: 2em; }
125: .element {
126: background: #EEEEFF;
127: color: black;
128: margin: 0 0 1em 0.15em;
129: padding: 0 1em 0.25em 0.75em;
130: border-left: solid #9999FF 0.25em;
131: position: relative;
132: z-index: 1;
133: }
134: .element:before {
135: position: absolute;
136: z-index: 2;
137: top: 0;
138: left: -1.15em;
139: height: 2em;
140: width: 0.9em;
141: background: #EEEEFF;
142: content: ' ';
143: border-style: none none solid solid;
144: border-color: #9999FF;
145: border-width: 0.25em;
146: }
147:
148: .example { display: block; color: #222222; background: #FCFCFC; border-left: double; margin-left: 2em; padding-left: 1em; }
149: td > .example:only-child { margin: 0 0 0 0.1em; }
150:
151: ul.domTree, ul.domTree ul { padding: 0 0 0 1em; margin: 0; }
152: ul.domTree li { padding: 0; margin: 0; list-style: none; position: relative; }
153: ul.domTree li li { list-style: none; }
154: ul.domTree li:first-child::before { position: absolute; top: 0; height: 0.6em; left: -0.75em; width: 0.5em; border-style: none none solid solid; content: ''; border-width: 0.1em; }
155: ul.domTree li:not(:last-child)::after { position: absolute; top: 0; bottom: -0.6em; left: -0.75em; width: 0.5em; border-style: none none solid solid; content: ''; border-width: 0.1em; }
156: ul.domTree span { font-style: italic; font-family: serif; }
157: ul.domTree .t1 code { color: purple; font-weight: bold; }
158: ul.domTree .t2 { font-style: normal; font-family: monospace; }
159: ul.domTree .t2 .name { color: black; font-weight: bold; }
160: ul.domTree .t2 .value { color: blue; font-weight: normal; }
161: ul.domTree .t3 code, .domTree .t4 code, .domTree .t5 code { color: gray; }
162: ul.domTree .t7 code, .domTree .t8 code { color: green; }
163: ul.domTree .t10 code { color: teal; }
164:
165: body.dfnEnabled dfn { cursor: pointer; }
166: .dfnPanel {
167: display: inline;
168: position: absolute;
169: z-index: 10;
170: height: auto;
171: width: auto;
172: padding: 0.5em 0.75em;
173: font: small sans-serif, Droid Sans Fallback;
174: background: #DDDDDD;
175: color: black;
176: border: outset 0.2em;
177: }
178: .dfnPanel * { margin: 0; padding: 0; font: inherit; text-indent: 0; }
179: .dfnPanel :link, .dfnPanel :visited { color: black; }
180: .dfnPanel p { font-weight: bolder; }
181: .dfnPanel * + p { margin-top: 0.25em; }
182: .dfnPanel li { list-style-position: inside; }
183:
184: #configUI { position: absolute; z-index: 20; top: 10em; right: 1em; width: 11em; font-size: small; }
185: #configUI p { margin: 0.5em 0; padding: 0.3em; background: #EEEEEE; color: black; border: inset thin; }
186: #configUI p label { display: block; }
187: #configUI #updateUI, #configUI .loginUI { text-align: center; }
188: #configUI input[type=button] { display: block; margin: auto; }
189:
190: fieldset { margin: 1em; padding: 0.5em 1em; }
191: fieldset > legend + * { margin-top: 0; }
192: fieldset > :last-child { margin-bottom: 0; }
193: fieldset p { margin: 0.5em 0; }
194:
1.99 mike 195: </style><link href="style.css" rel="stylesheet"><link href="http://www.w3.org/StyleSheets/TR/W3C-ED" rel="stylesheet" type="text/css"><script src="link-fixup.js" type="text/javascript"></script><style type="text/css">
1.1 mike 196:
197: .applies thead th > * { display: block; }
198: .applies thead code { display: block; }
199: .applies tbody th { whitespace: nowrap; }
200: .applies td { text-align: center; }
201: .applies .yes { background: yellow; }
202:
203: .matrix, .matrix td { border: hidden; text-align: right; }
204: .matrix { margin-left: 2em; }
205:
206: .dice-example { border-collapse: collapse; border-style: hidden solid solid hidden; border-width: thin; margin-left: 3em; }
207: .dice-example caption { width: 30em; font-size: smaller; font-style: italic; padding: 0.75em 0; text-align: left; }
208: .dice-example td, .dice-example th { border: solid thin; width: 1.35em; height: 1.05em; text-align: center; padding: 0; }
209:
210: td.eg { border-width: thin; text-align: center; }
211:
212: #table-example-1 { border: solid thin; border-collapse: collapse; margin-left: 3em; }
213: #table-example-1 * { font-family: "Essays1743", serif; line-height: 1.01em; }
214: #table-example-1 caption { padding-bottom: 0.5em; }
215: #table-example-1 thead, #table-example-1 tbody { border: none; }
216: #table-example-1 th, #table-example-1 td { border: solid thin; }
217: #table-example-1 th { font-weight: normal; }
218: #table-example-1 td { border-style: none solid; vertical-align: top; }
219: #table-example-1 th { padding: 0.5em; vertical-align: middle; text-align: center; }
220: #table-example-1 tbody tr:first-child td { padding-top: 0.5em; }
221: #table-example-1 tbody tr:last-child td { padding-bottom: 1.5em; }
222: #table-example-1 tbody td:first-child { padding-left: 2.5em; padding-right: 0; width: 9em; }
223: #table-example-1 tbody td:first-child::after { content: leader(". "); }
224: #table-example-1 tbody td { padding-left: 2em; padding-right: 2em; }
225: #table-example-1 tbody td:first-child + td { width: 10em; }
226: #table-example-1 tbody td:first-child + td ~ td { width: 2.5em; }
227: #table-example-1 tbody td:first-child + td + td + td ~ td { width: 1.25em; }
228:
229: .apple-table-examples { border: none; border-collapse: separate; border-spacing: 1.5em 0em; width: 40em; margin-left: 3em; }
230: .apple-table-examples * { font-family: "Times", serif; }
231: .apple-table-examples td, .apple-table-examples th { border: none; white-space: nowrap; padding-top: 0; padding-bottom: 0; }
232: .apple-table-examples tbody th:first-child { border-left: none; width: 100%; }
233: .apple-table-examples thead th:first-child ~ th { font-size: smaller; font-weight: bolder; border-bottom: solid 2px; text-align: center; }
234: .apple-table-examples tbody th::after, .apple-table-examples tfoot th::after { content: leader(". ") }
235: .apple-table-examples tbody th, .apple-table-examples tfoot th { font: inherit; text-align: left; }
236: .apple-table-examples td { text-align: right; vertical-align: top; }
237: .apple-table-examples.e1 tbody tr:last-child td { border-bottom: solid 1px; }
238: .apple-table-examples.e1 tbody + tbody tr:last-child td { border-bottom: double 3px; }
239: .apple-table-examples.e2 th[scope=row] { padding-left: 1em; }
240: .apple-table-examples sup { line-height: 0; }
241:
242: .details-example img { vertical-align: top; }
243:
244: #base64-table {
245: white-space: nowrap;
246: font-size: 0.6em;
247: column-width: 6em;
248: column-count: 5;
249: column-gap: 1em;
250: -moz-column-width: 6em;
251: -moz-column-count: 5;
252: -moz-column-gap: 1em;
253: -webkit-column-width: 6em;
254: -webkit-column-count: 5;
255: -webkit-column-gap: 1em;
256: }
257: #base64-table thead { display: none; }
258: #base64-table * { border: none; }
259: #base64-table tbody td:first-child:after { content: ':'; }
260: #base64-table tbody td:last-child { text-align: right; }
261:
262: #named-character-references-table {
263: white-space: nowrap;
264: font-size: 0.6em;
265: column-width: 30em;
266: column-gap: 1em;
267: -moz-column-width: 30em;
268: -moz-column-gap: 1em;
269: -webkit-column-width: 30em;
270: -webkit-column-gap: 1em;
271: }
272: #named-character-references-table > table > tbody > tr > td:first-child + td,
273: #named-character-references-table > table > tbody > tr > td:last-child { text-align: center; }
274: #named-character-references-table > table > tbody > tr > td:last-child:hover > span { position: absolute; top: auto; left: auto; margin-left: 0.5em; line-height: 1.2; font-size: 5em; border: outset; padding: 0.25em 0.5em; background: white; width: 1.25em; height: auto; text-align: center; }
275: #named-character-references-table > table > tbody > tr#entity-CounterClockwiseContourIntegral > td:first-child { font-size: 0.5em; }
276:
277: .glyph.control { color: red; }
278:
279: @font-face {
280: font-family: 'Essays1743';
281: src: url('http://www.whatwg.org/specs/web-apps/current-work/fonts/Essays1743.ttf');
282: }
283: @font-face {
284: font-family: 'Essays1743';
285: font-weight: bold;
286: src: url('http://www.whatwg.org/specs/web-apps/current-work/fonts/Essays1743-Bold.ttf');
287: }
288: @font-face {
289: font-family: 'Essays1743';
290: font-style: italic;
291: src: url('http://www.whatwg.org/specs/web-apps/current-work/fonts/Essays1743-Italic.ttf');
292: }
293: @font-face {
294: font-family: 'Essays1743';
295: font-style: italic;
296: font-weight: bold;
297: src: url('http://www.whatwg.org/specs/web-apps/current-work/fonts/Essays1743-BoldItalic.ttf');
298: }
299:
300: </style><script type="text/javascript">
301: function getCookie(name) {
302: var params = location.search.substr(1).split("&");
303: for (var index = 0; index < params.length; index++) {
304: if (params[index] == name)
305: return "1";
306: var data = params[index].split("=");
307: if (data[0] == name)
308: return unescape(data[1]);
309: }
310: var cookies = document.cookie.split("; ");
311: for (var index = 0; index < cookies.length; index++) {
312: var data = cookies[index].split("=");
313: if (data[0] == name)
314: return unescape(data[1]);
315: }
316: return null;
317: }
318: function load(script) {
319: var e = document.createElement('script');
320: e.setAttribute('src', script + '?' + encodeURIComponent(location) + '&' + encodeURIComponent(document.referrer));
321: document.body.appendChild(e);
322: }
323: function init() {
324: if (location.search == '?slow-browser')
325: return;
326: var configUI = document.createElement('div');
327: configUI.id = 'configUI';
328: document.body.appendChild(configUI);
329: if (document.getElementById('head'))
330: load('toc.js');
331: load('dfn.js');
332: if (getCookie('profile') == '1')
333: document.getElementsByTagName('h2')[0].textContent += '; load: ' + (new Date() - loadTimer) + 'ms';
334: fixBrokenLink();
335: }
1.99 mike 336: </script><script src="dfn.js" type="text/javascript"></script><script src="toc.js" type="text/javascript"></script><link href="the-script-element.html" rel="prev" title="4.3.1 The script element">
337: <link href="Overview.html#contents" rel="contents" title="Table of contents">
1.91 mike 338: <link href="sections.html" rel="next" title="4.4 Sections">
1.99 mike 339: <body class="split chapter"><div class="head" id="head">
1.9 mike 340: <div aria-haspopup="true" id="jumpIndexA-button" role="button" tabindex="0">jump
1.110 mike 341: <div id="jumpIndexA"><ul><li><a class="noindex" href="the-a-element.html#the-a-element">a</a><a class="noindex" href="the-abbr-element.html#the-abbr-element">abbr</a><a class="noindex" href="the-address-element.html#the-address-element">address</a><a class="noindex" href="the-area-element.html#the-area-element">area</a><a class="noindex" href="the-article-element.html#the-article-element">article</a><a class="noindex" href="the-aside-element.html#the-aside-element">aside</a><a class="noindex" href="the-audio-element.html#the-audio-element">audio</a></ul><ul><li><a class="noindex" href="the-b-element.html#the-b-element">b</a><a class="noindex" href="the-base-element.html#the-base-element">base</a><a class="noindex" href="the-bdi-element.html#the-bdi-element">bdi</a><a class="noindex" href="the-bdo-element.html#the-bdo-element">bdo</a><a class="noindex" href="the-blockquote-element.html#the-blockquote-element">blockquote</a><a class="noindex" href="the-body-element.html#the-body-element">body</a><a class="noindex" href="the-br-element.html#the-br-element">br</a><a class="noindex" href="the-button-element.html#the-button-element">button</a></ul><ul><li><a class="noindex" href="the-canvas-element.html#the-canvas-element">canvas</a><a class="noindex" href="the-caption-element.html#the-caption-element">caption</a><a class="noindex" href="the-cite-element.html#the-cite-element">cite</a><a class="noindex" href="the-code-element.html#the-code-element">code</a><a class="noindex" href="the-col-element.html#the-col-element">col</a><a class="noindex" href="the-colgroup-element.html#the-colgroup-element">colgroup</a><a class="noindex" href="the-command-element.html#the-command-element">command</a></ul><ul><li><a class="noindex" href="the-datalist-element.html#the-datalist-element">datalist</a><a class="noindex" href="the-dd-element.html#the-dd-element">dd</a><a class="noindex" href="the-del-element.html#the-del-element">del</a><a class="noindex" href="the-details-element.html#the-details-element">details</a><a class="noindex" href="the-dfn-element.html#the-dfn-element">dfn</a><a class="noindex" href="the-div-element.html#the-div-element">div</a><a class="noindex" href="the-dl-element.html#the-dl-element">dl</a><a class="noindex" href="the-dt-element.html#the-dt-element">dt</a></ul><ul><li><a class="noindex" href="the-em-element.html#the-em-element">em</a><a class="noindex" href="the-embed-element.html#the-embed-element">embed</a><a class="noindex" href="the-fieldset-element.html#the-fieldset-element">fieldset</a><a class="noindex" href="the-figcaption-element.html#the-figcaption-element">figcaption</a><a class="noindex" href="the-figure-element.html#the-figure-element">figure</a><a class="noindex" href="the-footer-element.html#the-footer-element">footer</a><a class="noindex" href="the-form-element.html#the-form-element">form</a></ul><ul><li><a class="noindex" href="the-h1-h2-h3-h4-h5-and-h6-elements.html#the-h1-h2-h3-h4-h5-and-h6-elements">h1</a><a class="noindex" href="the-h1-h2-h3-h4-h5-and-h6-elements.html#the-h1-h2-h3-h4-h5-and-h6-elements">h2</a><a class="noindex" href="the-h1-h2-h3-h4-h5-and-h6-elements.html#the-h1-h2-h3-h4-h5-and-h6-elements">h3</a><a class="noindex" href="the-h1-h2-h3-h4-h5-and-h6-elements.html#the-h1-h2-h3-h4-h5-and-h6-elements">h4</a><a class="noindex" href="the-h1-h2-h3-h4-h5-and-h6-elements.html#the-h1-h2-h3-h4-h5-and-h6-elements">h5</a><a class="noindex" href="the-h1-h2-h3-h4-h5-and-h6-elements.html#the-h1-h2-h3-h4-h5-and-h6-elements">h6</a><a class="noindex" href="the-head-element.html#the-head-element">head</a><a class="noindex" href="the-header-element.html#the-header-element">header</a><a class="noindex" href="the-hgroup-element.html#the-hgroup-element">hgroup</a><a class="noindex" href="the-hr-element.html#the-hr-element">hr</a><a class="noindex" href="the-html-element.html#the-html-element">html</a></ul><ul><li><a class="noindex" href="the-i-element.html#the-i-element">i</a><a class="noindex" href="the-iframe-element.html#the-iframe-element">iframe</a><a class="noindex" href="the-img-element.html#the-img-element">img</a><a class="noindex" href="the-input-element.html#the-input-element">input</a><a class="noindex" href="the-ins-element.html#the-ins-element">ins</a><a class="noindex" href="the-kbd-element.html#the-kbd-element">kbd</a><a class="noindex" href="the-keygen-element.html#the-keygen-element">keygen</a></ul><ul><li><a class="noindex" href="the-label-element.html#the-label-element">label</a><a class="noindex" href="the-legend-element.html#the-legend-element">legend</a><a class="noindex" href="the-li-element.html#the-li-element">li</a><a class="noindex" href="the-link-element.html#the-link-element">link</a><a class="noindex" href="the-map-element.html#the-map-element">map</a><a class="noindex" href="the-mark-element.html#the-mark-element">mark</a><a class="noindex" href="the-menu-element.html#the-menu-element">menu</a><a class="noindex" href="the-meta-element.html#the-meta-element">meta</a><a class="noindex" href="the-meter-element.html#the-meter-element">meter</a></ul><ul><li><a class="noindex" href="the-nav-element.html#the-nav-element">nav</a><a class="noindex" href="#the-noscript-element">noscript</a><a class="noindex" href="the-object-element.html#the-object-element">object</a><a class="noindex" href="the-ol-element.html#the-ol-element">ol</a><a class="noindex" href="the-optgroup-element.html#the-optgroup-element">optgroup</a><a class="noindex" href="the-option-element.html#the-option-element">option</a><a class="noindex" href="the-output-element.html#the-output-element">output</a></ul><ul><li><a class="noindex" href="the-p-element.html#the-p-element">p</a><a class="noindex" href="the-param-element.html#the-param-element">param</a><a class="noindex" href="the-pre-element.html#the-pre-element">pre</a><a class="noindex" href="the-progress-element.html#the-progress-element">progress</a><a class="noindex" href="the-q-element.html#the-q-element">q</a><a class="noindex" href="the-rp-element.html#the-rp-element">rp</a><a class="noindex" href="the-rt-element.html#the-rt-element">rt</a><a class="noindex" href="the-ruby-element.html#the-ruby-element">ruby</a></ul><ul><li><a class="noindex" href="the-s-element.html#the-s-element">s</a><a class="noindex" href="the-samp-element.html#the-samp-element">samp</a><a class="noindex" href="the-script-element.html#the-script-element">script</a><a class="noindex" href="the-section-element.html#the-section-element">section</a><a class="noindex" href="the-select-element.html#the-select-element">select</a><a class="noindex" href="the-small-element.html#the-small-element">small</a><a class="noindex" href="the-source-element.html#the-source-element">source</a><a class="noindex" href="the-span-element.html#the-span-element">span</a></ul><ul><li><a class="noindex" href="the-strong-element.html#the-strong-element">strong</a><a class="noindex" href="the-style-element.html#the-style-element">style</a><a class="noindex" href="the-sub-and-sup-elements.html#the-sub-and-sup-elements">sub</a><a class="noindex" href="the-summary-element.html#the-summary-element">summary</a><a class="noindex" href="the-sub-and-sup-elements.html#the-sub-and-sup-elements">sup</a></ul><ul><li><a class="noindex" href="the-table-element.html#the-table-element">table</a><a class="noindex" href="the-tbody-element.html#the-tbody-element">tbody</a><a class="noindex" href="the-td-element.html#the-td-element">td</a><a class="noindex" href="the-textarea-element.html#the-textarea-element">textarea</a><a class="noindex" href="the-tfoot-element.html#the-tfoot-element">tfoot</a><a class="noindex" href="the-th-element.html#the-th-element">th</a><a class="noindex" href="the-thead-element.html#the-thead-element">thead</a><a class="noindex" href="the-time-element.html#the-time-element">time</a><a class="noindex" href="the-title-element.html#the-title-element">title</a></ul><ul><li><a class="noindex" href="the-tr-element.html#the-tr-element">tr</a><a class="noindex" href="the-track-element.html#the-track-element">track</a><a class="noindex" href="the-u-element.html#the-u-element">u</a><a class="noindex" href="the-ul-element.html#the-ul-element">ul</a><a class="noindex" href="the-var-element.html#the-var-element">var</a><a class="noindex" href="the-video-element.html#the-video-element">video</a><a class="noindex" href="the-wbr-element.html#the-wbr-element">wbr</a></ul><ul class="jumpIndexA-other"><li><a class="noindex" href="global-attributes.html#global-attributes">global attributes</a><a class="noindex" href="index-of-terms.html#index-of-terms">terms</a></ul></div></div>
1.11 mike 342: <script src="jump-indexes.js"></script><p><a href="http://www.w3.org/"><img alt="W3C" height="48" src="http://www.w3.org/Icons/w3c_home" width="72"></a></p>
1.1 mike 343:
1.91 mike 344: <h1>HTML5: Edition for Web Authors</h1>
345:
346: </div><div class="prev_next">
347: <a href="the-script-element.html">← 4.3.1 The script element</a> –
1.1 mike 348: <a href="Overview.html#contents">Table of contents</a> –
1.91 mike 349: <a href="sections.html">4.4 Sections →</a>
1.1 mike 350: </div>
351:
1.91 mike 352: <h4 id="the-noscript-element"><span class="secno">4.3.2 </span>The <dfn aria-haspopup="true" role="button" tabindex="0"><code>noscript</code></dfn> element</h4><dl class="element"><dt>Categories</dt>
1.1 mike 353: <dd><a href="content-models.html#metadata-content" id="metadata-content_14">Metadata content</a>.</dd>
1.111 mike 354: <dd><a href="content-models.html#flow-content" id="flow-content_14">Flow content</a>.</dd>
1.108 mike 355: <dd><a href="content-models.html#phrasing-content" id="phrasing-content_21">Phrasing content</a>.</dd>
1.1 mike 356: <dt>Contexts in which this element can be used:</dt>
1.102 mike 357: <dd>In a <code><a href="the-head-element.html#the-head-element" id="head_19">head</a></code> element of an <a class="full-spec-link" href="http://dev.w3.org/html5/spec/infrastructure.html#html-documents" title='Read about this "HTML document" reference in the full HTML5 spec.'>HTML document</a>, if there are no ancestor <code><a href="#the-noscript-element" id="noscript_7">noscript</a></code> elements.</dd>
1.108 mike 358: <dd>Where <a href="content-models.html#phrasing-content" id="phrasing-content_22">phrasing content</a> is expected in <a class="full-spec-link" href="http://dev.w3.org/html5/spec/infrastructure.html#html-documents" title='Read about this "HTML documents" reference in the full HTML5 spec.'>HTML documents</a>, if there are no ancestor <code><a href="#the-noscript-element" id="noscript_8">noscript</a></code> elements.</dd>
1.1 mike 359: <dt>Content model:</dt>
1.111 mike 360: <dd>When <a class="full-spec-link" href="http://dev.w3.org/html5/spec/webappapis.html#concept-n-noscript" title='Read about this "scripting is disabled" reference in the full HTML5 spec.'>scripting is disabled</a>, in a <code><a href="the-head-element.html#the-head-element" id="head_20">head</a></code> element: in any order, zero or more <code><a href="the-link-element.html#the-link-element" id="link_24">link</a></code> elements, zero or more <code><a href="the-style-element.html#the-style-element" id="style_29">style</a></code> elements, and zero or more <code><a href="the-meta-element.html#the-meta-element" id="meta_28">meta</a></code> elements.</dd>
1.99 mike 361: <dd>When <a class="full-spec-link" href="http://dev.w3.org/html5/spec/webappapis.html#concept-n-noscript" title='Read about this "scripting is disabled" reference in the full HTML5 spec.'>scripting is disabled</a>, not in a <code><a href="the-head-element.html#the-head-element" id="head_21">head</a></code> element: <a href="content-models.html#transparent" id="transparent_1">transparent</a>, but there must be no <code><a href="#the-noscript-element" id="noscript_9">noscript</a></code> element descendants.</dd>
1.1 mike 362: <dd>Otherwise: text that conforms to the requirements given in the prose.</dd>
363: <dt>Content attributes:</dt>
1.6 mike 364: <dd><a href="global-attributes.html#global-attributes" id="global-attributes_8">Global attributes</a></dd>
1.1 mike 365: <dt>DOM interface:</dt>
1.105 mike 366: <dd>Uses <code><a href="elements.html#htmlelement" id="htmlelement_14">HTMLElement</a></code>.</dd>
1.110 mike 367: </dl><p>The <code><a href="#the-noscript-element" id="noscript_10">noscript</a></code> element <a class="full-spec-link" href="http://dev.w3.org/html5/spec/rendering.html#represents" title='Read about this "represents" reference in the full HTML5 spec.'>represents</a> nothing
1.99 mike 368: if <a class="full-spec-link" href="http://dev.w3.org/html5/spec/webappapis.html#concept-n-script" title='Read about this "scripting is enabled" reference in the full HTML5 spec.'>scripting is enabled</a>, and
1.110 mike 369: <a class="full-spec-link" href="http://dev.w3.org/html5/spec/rendering.html#represents" title='Read about this "represents" reference in the full HTML5 spec.'>represents</a> its children if <a class="full-spec-link" href="http://dev.w3.org/html5/spec/webappapis.html#concept-n-noscript" title='Read about this "scripting is disabled" reference in the full HTML5 spec.'>scripting is disabled</a>. It is used
1.1 mike 370: to present different markup to user agents that support scripting
371: and those that don't support scripting, by affecting how the
1.102 mike 372: document is parsed.<p>When used in <a class="full-spec-link" href="http://dev.w3.org/html5/spec/infrastructure.html#html-documents" title='Read about this "HTML documents" reference in the full HTML5 spec.'>HTML documents</a>, the allowed content
1.99 mike 373: model is as follows:<dl><dt>In a <code><a href="the-head-element.html#the-head-element" id="head_22">head</a></code> element, if <a class="full-spec-link" href="http://dev.w3.org/html5/spec/webappapis.html#concept-n-noscript" title='Read about this "scripting is disabled" reference in the full HTML5 spec.'>scripting is disabled</a> for the
1.1 mike 374: <code><a href="#the-noscript-element" id="noscript_11">noscript</a></code> element</dt>
375:
376: <dd><p>The <code><a href="#the-noscript-element" id="noscript_12">noscript</a></code> element must contain only
1.111 mike 377: <code><a href="the-link-element.html#the-link-element" id="link_25">link</a></code>, <code><a href="the-style-element.html#the-style-element" id="style_30">style</a></code>, and <code><a href="the-meta-element.html#the-meta-element" id="meta_29">meta</a></code>
1.1 mike 378: elements.</dd>
379:
1.99 mike 380: <dt>In a <code><a href="the-head-element.html#the-head-element" id="head_23">head</a></code> element, if <a class="full-spec-link" href="http://dev.w3.org/html5/spec/webappapis.html#concept-n-script" title='Read about this "scripting is enabled" reference in the full HTML5 spec.'>scripting is enabled</a> for the
1.1 mike 381: <code><a href="#the-noscript-element" id="noscript_13">noscript</a></code> element</dt>
382:
383: <dd><p>The <code><a href="#the-noscript-element" id="noscript_14">noscript</a></code> element must contain only text,
1.110 mike 384: except that invoking the <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-end.html#html-fragment-parsing-algorithm" title='Read about this "HTML fragment parsing algorithm" reference in the full HTML5 spec.'>HTML fragment parsing
1.1 mike 385: algorithm</a> with
1.110 mike 386: the <code><a href="#the-noscript-element" id="noscript_15">noscript</a></code> element as the <var title="concept-frag-parse-context"><a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-end.html#concept-frag-parse-context" title='Read about this "context" reference in the full HTML5 spec.'>context</a></var> element and the
1.1 mike 387: text contents as the <var title="">input</var> must result in a
1.110 mike 388: list of nodes that consists only of <code><a href="the-link-element.html#the-link-element" id="link_26">link</a></code>,
1.111 mike 389: <code><a href="the-style-element.html#the-style-element" id="style_31">style</a></code>, and <code><a href="the-meta-element.html#the-meta-element" id="meta_30">meta</a></code> elements that would be
1.1 mike 390: conforming if they were children of the <code><a href="#the-noscript-element" id="noscript_16">noscript</a></code>
1.110 mike 391: element, and no <a class="full-spec-link" href="http://dev.w3.org/html5/spec/parsing.html#parse-error" title='Read about this "parse errors" reference in the full HTML5 spec.'>parse
1.1 mike 392: errors</a>.</dd>
393:
1.99 mike 394: <dt>Outside of <code><a href="the-head-element.html#the-head-element" id="head_24">head</a></code> elements, if <a class="full-spec-link" href="http://dev.w3.org/html5/spec/webappapis.html#concept-n-noscript" title='Read about this "scripting is disabled" reference in the full HTML5 spec.'>scripting is disabled</a> for the
1.1 mike 395: <code><a href="#the-noscript-element" id="noscript_17">noscript</a></code> element</dt>
396:
397: <dd><p>The <code><a href="#the-noscript-element" id="noscript_18">noscript</a></code> element's content model is
398: <a href="content-models.html#transparent" id="transparent_2">transparent</a>, with the additional restriction that a
399: <code><a href="#the-noscript-element" id="noscript_19">noscript</a></code> element must not have a <code><a href="#the-noscript-element" id="noscript_20">noscript</a></code>
400: element as an ancestor (that is, <code><a href="#the-noscript-element" id="noscript_21">noscript</a></code> can't be
401: nested).</dd>
402:
1.99 mike 403: <dt>Outside of <code><a href="the-head-element.html#the-head-element" id="head_25">head</a></code> elements, if <a class="full-spec-link" href="http://dev.w3.org/html5/spec/webappapis.html#concept-n-script" title='Read about this "scripting is enabled" reference in the full HTML5 spec.'>scripting is enabled</a> for the
1.1 mike 404: <code><a href="#the-noscript-element" id="noscript_22">noscript</a></code> element</dt>
405:
406: <dd>
407:
408: <p>The <code><a href="#the-noscript-element" id="noscript_23">noscript</a></code> element must contain only text,
409: except that the text must be such that running the following
410: algorithm results in a conforming document with no
1.110 mike 411: <code><a href="#the-noscript-element" id="noscript_24">noscript</a></code> elements and no <code><a href="the-script-element.html#the-script-element" id="script_25">script</a></code>
1.1 mike 412: elements, and such that no step in the algorithm causes an
1.110 mike 413: <a class="full-spec-link" href="http://dev.w3.org/html5/spec/parsing.html#html-parser" title='Read about this "HTML parser" reference in the full HTML5 spec.'>HTML parser</a> to flag a <a class="full-spec-link" href="http://dev.w3.org/html5/spec/parsing.html#parse-error" title='Read about this "parse error" reference in the full HTML5 spec.'>parse error</a>:</p>
1.1 mike 414:
1.110 mike 415: <ol><li>Remove every <code><a href="the-script-element.html#the-script-element" id="script_26">script</a></code> element from the
1.1 mike 416: document.</li>
417:
418: <li>Make a list of every <code><a href="#the-noscript-element" id="noscript_25">noscript</a></code> element in the
419: document. For every <code><a href="#the-noscript-element" id="noscript_26">noscript</a></code> element in that list,
420: perform the following steps:
421:
422: <ol><li>Let the <var title="">parent element</var> be the parent
423: element of the <code><a href="#the-noscript-element" id="noscript_27">noscript</a></code> element.</li>
424:
425: <li>Take all the children of the <var title="">parent element</var>
426: that come before the <code><a href="#the-noscript-element" id="noscript_28">noscript</a></code> element, and call these
427: elements <var title="">the before children</var>.</li>
428:
429: <li>Take all the children of the <var title="">parent element</var>
430: that come <em>after</em> the <code><a href="#the-noscript-element" id="noscript_29">noscript</a></code> element, and
431: call these elements <var title="">the after children</var>.</li>
432:
433: <li>Let <var title="">s</var> be the concatenation of all the
434: <a href="infrastructure.html#text-node" id="text-node_12">text node</a> children of the <code><a href="#the-noscript-element" id="noscript_30">noscript</a></code>
435: element.</li>
436:
1.112 ! mike 437: <li>Set the <code title="dom-innerHTML">innerHTML</code>
1.1 mike 438: attribute of the <var title="">parent element</var> to the value
439: of <var title="">s</var>. (This, as a side-effect, causes the
440: <code><a href="#the-noscript-element" id="noscript_31">noscript</a></code> element to be removed from the
441: document.)</li>
442:
443: <li>Insert <var title="">the before children</var> at the start of
444: the <var title="">parent element</var>, preserving their original
445: relative order.</li>
446:
447: <li>Insert <var title="">the after children</var> at the end of the
448: <var title="">parent element</var>, preserving their original
449: relative order.</li>
450:
451: </ol></li>
452:
453: </ol></dd>
454:
455: </dl><p class="note">All these contortions are required because, for
456: historical reasons, the <code><a href="#the-noscript-element" id="noscript_32">noscript</a></code> element is handled
1.110 mike 457: differently by the <a class="full-spec-link" href="http://dev.w3.org/html5/spec/parsing.html#html-parser" title='Read about this "HTML parser" reference in the full HTML5 spec.'>HTML parser</a> based on whether <a class="full-spec-link" href="http://dev.w3.org/html5/spec/parsing.html#scripting-flag" title='Read about this "scripting was enabled or not" reference in the full HTML5 spec.'>scripting was enabled or not</a> when the
1.102 mike 458: parser was invoked.<p>The <code><a href="#the-noscript-element" id="noscript_33">noscript</a></code> element must not be used in <a class="full-spec-link" href="http://dev.w3.org/html5/spec/infrastructure.html#xml-documents" title='Read about this "XML documents" reference in the full HTML5 spec.'>XML
1.99 mike 459: documents</a>.<p class="note">The <code><a href="#the-noscript-element" id="noscript_34">noscript</a></code> element is only effective
1.110 mike 460: in <a href="syntax.html#syntax" id="the-html-syntax_2">the HTML syntax</a>, it has no effect in <a href="the-xhtml-syntax.html#the-xhtml-syntax">the XHTML
1.99 mike 461: syntax</a>. This is because the way it works is by essentially
462: "turning off" the parser when scripts are enabled, so that the
463: contents of the element are treated as pure text and not as real
464: elements. XML does not define a mechanism by which to do this.<div class="example">
1.1 mike 465:
466: <p>In the following example, a <code><a href="#the-noscript-element" id="noscript_35">noscript</a></code> element is
467: used to provide fallback for a script.</p>
468:
469: <pre><form action="calcSquare.php">
470: <p>
471: <label for=x>Number</label>:
472: <input id="x" name="x" type="number">
473: </p>
474: <script>
475: var x = document.getElementById('x');
476: var output = document.createElement('p');
477: output.textContent = 'Type a number; it will be squared right then!';
478: x.form.appendChild(output);
479: x.form.onsubmit = function () { return false; }
480: x.oninput = function () {
481: var v = x.valueAsNumber;
482: output.textContent = v + ' squared is ' + v * v;
483: };
484: </script>
485: <noscript>
486: <input type=submit value="Calculate Square">
487: </noscript>
488: </form></pre>
489:
490: <p>When script is disabled, a button appears to do the calculation
491: on the server side. When script is enabled, the value is computed
492: on-the-fly instead.</p>
493:
494: <p>The <code><a href="#the-noscript-element" id="noscript_36">noscript</a></code> element is a blunt
495: instrument. Sometimes, scripts might be enabled, but for some
496: reason the page's script might fail. For this reason, it's
497: generally better to avoid using <code><a href="#the-noscript-element" id="noscript_37">noscript</a></code>, and to
498: instead design the script to change the page from being a
499: scriptless page to a scripted page on the fly, as in the next
500: example:</p>
501:
502: <pre><form action="calcSquare.php">
503: <p>
504: <label for=x>Number</label>:
505: <input id="x" name="x" type="number">
506: </p>
507: <strong><input id="submit" type=submit value="Calculate Square"></strong>
508: <script>
509: var x = document.getElementById('x');
510: var output = document.createElement('p');
511: output.textContent = 'Type a number; it will be squared right then!';
512: x.form.appendChild(output);
513: x.form.onsubmit = function () { return false; }
514: x.oninput = function () {
515: var v = x.valueAsNumber;
516: output.textContent = v + ' squared is ' + v * v;
517: };
518: <strong> var submit = document.getElementById('submit');
519: submit.parentNode.removeChild(submit);</strong>
520: </script>
521: </form></pre>
522:
523: <p>The above technique is also useful in XHTML, since
1.110 mike 524: <code><a href="#the-noscript-element" id="noscript_38">noscript</a></code> is not supported in <a href="the-xhtml-syntax.html#the-xhtml-syntax">the XHTML
1.1 mike 525: syntax</a>.</p>
526:
527: </div>
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