Annotation of html5/spec/the-a-element.html, revision 1.191
1.88 mike 1: <!DOCTYPE html>
1.159 sruby 2: <html lang="en-US-x-Hixie"><head><title>4.6.1 The a element — HTML5</title><style type="text/css">
1.1 mike 3: pre { margin-left: 2em; white-space: pre-wrap; }
4: h2 { margin: 3em 0 1em 0; }
5: h3 { margin: 2.5em 0 1em 0; }
6: h4 { margin: 2.5em 0 0.75em 0; }
7: h5, h6 { margin: 2.5em 0 1em; }
8: h1 + h2, h1 + h2 + h2 { margin: 0.75em 0 0.75em; }
9: h2 + h3, h3 + h4, h4 + h5, h5 + h6 { margin-top: 0.5em; }
10: p { margin: 1em 0; }
11: hr:not(.top) { display: block; background: none; border: none; padding: 0; margin: 2em 0; height: auto; }
12: dl, dd { margin-top: 0; margin-bottom: 0; }
13: dt { margin-top: 0.75em; margin-bottom: 0.25em; clear: left; }
14: dt + dt { margin-top: 0; }
15: dd dt { margin-top: 0.25em; margin-bottom: 0; }
16: dd p { margin-top: 0; }
17: dd dl + p { margin-top: 1em; }
18: dd table + p { margin-top: 1em; }
19: p + * > li, dd li { margin: 1em 0; }
20: dt, dfn { font-weight: bold; font-style: normal; }
21: i, em { font-style: italic; }
22: dt dfn { font-style: italic; }
23: pre, code { font-size: inherit; font-family: monospace; font-variant: normal; }
24: pre strong { color: black; font: inherit; font-weight: bold; background: yellow; }
25: pre em { font-weight: bolder; font-style: normal; }
26: @media screen { code { color: orangered; } code :link, code :visited { color: inherit; } }
27: var sub { vertical-align: bottom; font-size: smaller; position: relative; top: 0.1em; }
28: table { border-collapse: collapse; border-style: hidden hidden none hidden; }
29: table thead, table tbody { border-bottom: solid; }
30: table tbody th:first-child { border-left: solid; }
31: table tbody th { text-align: left; }
32: table td, table th { border-left: solid; border-right: solid; border-bottom: solid thin; vertical-align: top; padding: 0.2em; }
33: blockquote { margin: 0 0 0 2em; border: 0; padding: 0; font-style: italic; }
34:
35: .bad, .bad *:not(.XXX) { color: gray; border-color: gray; background: transparent; }
36: .matrix, .matrix td { border: none; text-align: right; }
37: .matrix { margin-left: 2em; }
38: .dice-example { border-collapse: collapse; border-style: hidden solid solid hidden; border-width: thin; margin-left: 3em; }
39: .dice-example caption { width: 30em; font-size: smaller; font-style: italic; padding: 0.75em 0; text-align: left; }
40: .dice-example td, .dice-example th { border: solid thin; width: 1.35em; height: 1.05em; text-align: center; padding: 0; }
41:
42: .toc dfn, h1 dfn, h2 dfn, h3 dfn, h4 dfn, h5 dfn, h6 dfn { font: inherit; }
43: img.extra, p.overview { float: right; }
44: pre.idl { border: solid thin; background: #EEEEEE; color: black; padding: 0.5em 1em; position: relative; }
45: pre.idl :link, pre.idl :visited { color: inherit; background: transparent; }
46: pre.idl::before { content: "IDL"; font: bold small sans-serif; padding: 0.5em; background: white; position: absolute; top: 0; margin: -1px 0 0 -4em; width: 1.5em; border: thin solid; border-radius: 0 0 0 0.5em }
47: pre.css { border: solid thin; background: #FFFFEE; color: black; padding: 0.5em 1em; }
48: pre.css:first-line { color: #AAAA50; }
49: dl.domintro { color: green; margin: 2em 0 2em 2em; padding: 0.5em 1em; border: none; background: #DDFFDD; }
50: hr + dl.domintro, div.impl + dl.domintro { margin-top: 2.5em; margin-bottom: 1.5em; }
51: dl.domintro dt, dl.domintro dt * { color: black; text-decoration: none; }
52: dl.domintro dd { margin: 0.5em 0 1em 2em; padding: 0; }
53: dl.domintro dd p { margin: 0.5em 0; }
54: dl.domintro:before { display: table; margin: -1em -0.5em -0.5em auto; width: auto; content: 'This box is non-normative. Implementation requirements are given below this box.'; color: black; font-style: italic; border: solid 2px; background: white; padding: 0 0.25em; }
55: dl.switch { padding-left: 2em; }
56: dl.switch > dt { text-indent: -1.5em; }
57: dl.switch > dt:before { content: '\21AA'; padding: 0 0.5em 0 0; display: inline-block; width: 1em; text-align: right; line-height: 0.5em; }
58: dl.triple { padding: 0 0 0 1em; }
59: dl.triple dt, dl.triple dd { margin: 0; display: inline }
60: dl.triple dt:after { content: ':'; }
61: dl.triple dd:after { content: '\A'; white-space: pre; }
62: .diff-old { text-decoration: line-through; color: silver; background: transparent; }
63: .diff-chg, .diff-new { text-decoration: underline; color: green; background: transparent; }
64: a .diff-new { border-bottom: 1px blue solid; }
65:
1.182 sruby 66: figure.diagrams { border: double black; background: white; padding: 1em; }
67: figure.diagrams img { display: block; margin: 1em auto; }
68:
1.1 mike 69: h2 { page-break-before: always; }
70: h1, h2, h3, h4, h5, h6 { page-break-after: avoid; }
71: h1 + h2, hr + h2.no-toc { page-break-before: auto; }
72:
73: p > span:not([title=""]):not([class="XXX"]):not([class="impl"]):not([class="note"]),
74: li > span:not([title=""]):not([class="XXX"]):not([class="impl"]):not([class="note"]), { border-bottom: solid #9999CC; }
75:
76: div.head { margin: 0 0 1em; padding: 1em 0 0 0; }
77: div.head p { margin: 0; }
78: div.head h1 { margin: 0; }
79: div.head .logo { float: right; margin: 0 1em; }
80: div.head .logo img { border: none } /* remove border from top image */
81: div.head dl { margin: 1em 0; }
82: div.head p.copyright, div.head p.alt { font-size: x-small; font-style: oblique; margin: 0; }
83:
84: body > .toc > li { margin-top: 1em; margin-bottom: 1em; }
85: body > .toc.brief > li { margin-top: 0.35em; margin-bottom: 0.35em; }
86: body > .toc > li > * { margin-bottom: 0.5em; }
87: body > .toc > li > * > li > * { margin-bottom: 0.25em; }
88: .toc, .toc li { list-style: none; }
89:
90: .brief { margin-top: 1em; margin-bottom: 1em; line-height: 1.1; }
91: .brief li { margin: 0; padding: 0; }
92: .brief li p { margin: 0; padding: 0; }
93:
94: .category-list { margin-top: -0.75em; margin-bottom: 1em; line-height: 1.5; }
95: .category-list::before { content: '\21D2\A0'; font-size: 1.2em; font-weight: 900; }
96: .category-list li { display: inline; }
97: .category-list li:not(:last-child)::after { content: ', '; }
98: .category-list li > span, .category-list li > a { text-transform: lowercase; }
99: .category-list li * { text-transform: none; } /* don't affect <code> nested in <a> */
100:
101: .XXX { color: #E50000; background: white; border: solid red; padding: 0.5em; margin: 1em 0; }
102: .XXX > :first-child { margin-top: 0; }
103: p .XXX { line-height: 3em; }
104: .annotation { border: solid thin black; background: #0C479D; color: white; position: relative; margin: 8px 0 20px 0; }
105: .annotation:before { position: absolute; left: 0; top: 0; width: 100%; height: 100%; margin: 6px -6px -6px 6px; background: #333333; z-index: -1; content: ''; }
106: .annotation :link, .annotation :visited { color: inherit; }
107: .annotation :link:hover, .annotation :visited:hover { background: transparent; }
108: .annotation span { border: none ! important; }
109: .note { color: green; background: transparent; font-family: sans-serif; }
110: .warning { color: red; background: transparent; }
111: .note, .warning { font-weight: bolder; font-style: italic; }
112: .note em, .warning em, .note i, .warning i { font-style: normal; }
113: p.note, div.note { padding: 0.5em 2em; }
114: span.note { padding: 0 2em; }
115: .note p:first-child, .warning p:first-child { margin-top: 0; }
116: .note p:last-child, .warning p:last-child { margin-bottom: 0; }
117: .warning:before { font-style: normal; }
118: p.note:before { content: 'Note: '; }
119: p.warning:before { content: '\26A0 Warning! '; }
120:
121: .bookkeeping:before { display: block; content: 'Bookkeeping details'; font-weight: bolder; font-style: italic; }
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123: .bookkeeping p { margin: 0.5em 2em; display: list-item; list-style: square; }
124: .bookkeeping dt { margin: 0.5em 2em 0; }
125: .bookkeeping dd { margin: 0 3em 0.5em; }
126:
127: h4 { position: relative; z-index: 3; }
128: h4 + .element, h4 + div + .element { margin-top: -2.5em; padding-top: 2em; }
129: .element {
130: background: #EEEEFF;
131: color: black;
132: margin: 0 0 1em 0.15em;
133: padding: 0 1em 0.25em 0.75em;
134: border-left: solid #9999FF 0.25em;
135: position: relative;
136: z-index: 1;
137: }
138: .element:before {
139: position: absolute;
140: z-index: 2;
141: top: 0;
142: left: -1.15em;
143: height: 2em;
144: width: 0.9em;
145: background: #EEEEFF;
146: content: ' ';
147: border-style: none none solid solid;
148: border-color: #9999FF;
149: border-width: 0.25em;
150: }
151:
152: .example { display: block; color: #222222; background: #FCFCFC; border-left: double; margin-left: 2em; padding-left: 1em; }
153: td > .example:only-child { margin: 0 0 0 0.1em; }
154:
155: ul.domTree, ul.domTree ul { padding: 0 0 0 1em; margin: 0; }
156: ul.domTree li { padding: 0; margin: 0; list-style: none; position: relative; }
157: ul.domTree li li { list-style: none; }
158: 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; }
159: 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; }
160: ul.domTree span { font-style: italic; font-family: serif; }
161: ul.domTree .t1 code { color: purple; font-weight: bold; }
162: ul.domTree .t2 { font-style: normal; font-family: monospace; }
163: ul.domTree .t2 .name { color: black; font-weight: bold; }
164: ul.domTree .t2 .value { color: blue; font-weight: normal; }
165: ul.domTree .t3 code, .domTree .t4 code, .domTree .t5 code { color: gray; }
166: ul.domTree .t7 code, .domTree .t8 code { color: green; }
167: ul.domTree .t10 code { color: teal; }
168:
169: body.dfnEnabled dfn { cursor: pointer; }
170: .dfnPanel {
171: display: inline;
172: position: absolute;
173: z-index: 10;
174: height: auto;
175: width: auto;
176: padding: 0.5em 0.75em;
177: font: small sans-serif, Droid Sans Fallback;
178: background: #DDDDDD;
179: color: black;
180: border: outset 0.2em;
181: }
182: .dfnPanel * { margin: 0; padding: 0; font: inherit; text-indent: 0; }
183: .dfnPanel :link, .dfnPanel :visited { color: black; }
184: .dfnPanel p { font-weight: bolder; }
185: .dfnPanel * + p { margin-top: 0.25em; }
186: .dfnPanel li { list-style-position: inside; }
187:
188: #configUI { position: absolute; z-index: 20; top: 10em; right: 1em; width: 11em; font-size: small; }
189: #configUI p { margin: 0.5em 0; padding: 0.3em; background: #EEEEEE; color: black; border: inset thin; }
190: #configUI p label { display: block; }
191: #configUI #updateUI, #configUI .loginUI { text-align: center; }
192: #configUI input[type=button] { display: block; margin: auto; }
193:
194: fieldset { margin: 1em; padding: 0.5em 1em; }
195: fieldset > legend + * { margin-top: 0; }
196: fieldset > :last-child { margin-bottom: 0; }
197: fieldset p { margin: 0.5em 0; }
198:
1.159 sruby 199: </style><link href="http://www.w3.org/StyleSheets/TR/W3C-ED" rel="stylesheet" type="text/css"><style type="text/css">
1.1 mike 200:
201: .applies thead th > * { display: block; }
202: .applies thead code { display: block; }
203: .applies tbody th { whitespace: nowrap; }
204: .applies td { text-align: center; }
205: .applies .yes { background: yellow; }
206:
207: .matrix, .matrix td { border: hidden; text-align: right; }
208: .matrix { margin-left: 2em; }
209:
210: .dice-example { border-collapse: collapse; border-style: hidden solid solid hidden; border-width: thin; margin-left: 3em; }
211: .dice-example caption { width: 30em; font-size: smaller; font-style: italic; padding: 0.75em 0; text-align: left; }
212: .dice-example td, .dice-example th { border: solid thin; width: 1.35em; height: 1.05em; text-align: center; padding: 0; }
213:
214: td.eg { border-width: thin; text-align: center; }
215:
216: #table-example-1 { border: solid thin; border-collapse: collapse; margin-left: 3em; }
217: #table-example-1 * { font-family: "Essays1743", serif; line-height: 1.01em; }
218: #table-example-1 caption { padding-bottom: 0.5em; }
219: #table-example-1 thead, #table-example-1 tbody { border: none; }
220: #table-example-1 th, #table-example-1 td { border: solid thin; }
221: #table-example-1 th { font-weight: normal; }
222: #table-example-1 td { border-style: none solid; vertical-align: top; }
223: #table-example-1 th { padding: 0.5em; vertical-align: middle; text-align: center; }
224: #table-example-1 tbody tr:first-child td { padding-top: 0.5em; }
225: #table-example-1 tbody tr:last-child td { padding-bottom: 1.5em; }
226: #table-example-1 tbody td:first-child { padding-left: 2.5em; padding-right: 0; width: 9em; }
227: #table-example-1 tbody td:first-child::after { content: leader(". "); }
228: #table-example-1 tbody td { padding-left: 2em; padding-right: 2em; }
229: #table-example-1 tbody td:first-child + td { width: 10em; }
230: #table-example-1 tbody td:first-child + td ~ td { width: 2.5em; }
231: #table-example-1 tbody td:first-child + td + td + td ~ td { width: 1.25em; }
232:
233: .apple-table-examples { border: none; border-collapse: separate; border-spacing: 1.5em 0em; width: 40em; margin-left: 3em; }
234: .apple-table-examples * { font-family: "Times", serif; }
235: .apple-table-examples td, .apple-table-examples th { border: none; white-space: nowrap; padding-top: 0; padding-bottom: 0; }
236: .apple-table-examples tbody th:first-child { border-left: none; width: 100%; }
237: .apple-table-examples thead th:first-child ~ th { font-size: smaller; font-weight: bolder; border-bottom: solid 2px; text-align: center; }
238: .apple-table-examples tbody th::after, .apple-table-examples tfoot th::after { content: leader(". ") }
239: .apple-table-examples tbody th, .apple-table-examples tfoot th { font: inherit; text-align: left; }
240: .apple-table-examples td { text-align: right; vertical-align: top; }
241: .apple-table-examples.e1 tbody tr:last-child td { border-bottom: solid 1px; }
242: .apple-table-examples.e1 tbody + tbody tr:last-child td { border-bottom: double 3px; }
243: .apple-table-examples.e2 th[scope=row] { padding-left: 1em; }
244: .apple-table-examples sup { line-height: 0; }
245:
246: .details-example img { vertical-align: top; }
247:
248: #base64-table {
249: white-space: nowrap;
250: font-size: 0.6em;
251: column-width: 6em;
252: column-count: 5;
253: column-gap: 1em;
254: -moz-column-width: 6em;
255: -moz-column-count: 5;
256: -moz-column-gap: 1em;
257: -webkit-column-width: 6em;
258: -webkit-column-count: 5;
259: -webkit-column-gap: 1em;
260: }
261: #base64-table thead { display: none; }
262: #base64-table * { border: none; }
263: #base64-table tbody td:first-child:after { content: ':'; }
264: #base64-table tbody td:last-child { text-align: right; }
265:
266: #named-character-references-table {
267: white-space: nowrap;
268: font-size: 0.6em;
269: column-width: 30em;
270: column-gap: 1em;
271: -moz-column-width: 30em;
272: -moz-column-gap: 1em;
273: -webkit-column-width: 30em;
274: -webkit-column-gap: 1em;
275: }
276: #named-character-references-table > table > tbody > tr > td:first-child + td,
277: #named-character-references-table > table > tbody > tr > td:last-child { text-align: center; }
278: #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; }
279: #named-character-references-table > table > tbody > tr#entity-CounterClockwiseContourIntegral > td:first-child { font-size: 0.5em; }
280:
281: .glyph.control { color: red; }
282:
283: @font-face {
284: font-family: 'Essays1743';
1.180 sruby 285: src: url('../fonts/Essays1743.ttf');
1.1 mike 286: }
287: @font-face {
288: font-family: 'Essays1743';
289: font-weight: bold;
1.180 sruby 290: src: url('../fonts/Essays1743-Bold.ttf');
1.1 mike 291: }
292: @font-face {
293: font-family: 'Essays1743';
294: font-style: italic;
1.180 sruby 295: src: url('../fonts/Essays1743-Italic.ttf');
1.1 mike 296: }
297: @font-face {
298: font-family: 'Essays1743';
299: font-style: italic;
300: font-weight: bold;
1.180 sruby 301: src: url('../fonts/Essays1743-BoldItalic.ttf');
1.1 mike 302: }
303:
1.159 sruby 304: </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>
1.1 mike 305: function getCookie(name) {
306: var params = location.search.substr(1).split("&");
307: for (var index = 0; index < params.length; index++) {
308: if (params[index] == name)
309: return "1";
310: var data = params[index].split("=");
311: if (data[0] == name)
312: return unescape(data[1]);
313: }
314: var cookies = document.cookie.split("; ");
315: for (var index = 0; index < cookies.length; index++) {
316: var data = cookies[index].split("=");
317: if (data[0] == name)
318: return unescape(data[1]);
319: }
320: return null;
321: }
1.191 ! mike 322: </script>
! 323: <script src="link-fixup.js"></script>
! 324: <link href="text-level-semantics.html" title="4.6 Text-level semantics" rel="prev">
! 325: <link href="index.html#contents" title="Table of contents" rel="contents">
1.1 mike 326: <link href="the-em-element.html" title="4.6.2 The em element" rel="next">
1.22 mike 327: </head><body onload="fixBrokenLink();" class="split chapter"><div class="head" id="head">
1.1 mike 328: <p><a href="http://www.w3.org/"><img alt="W3C" height="48" src="http://www.w3.org/Icons/w3c_home" width="72"></a></p>
329:
330: <h1>HTML5</h1>
1.191 ! mike 331: <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 1.145.</p>
! 332:
1.190 sruby 333: <h2 class="no-num no-toc" id="editor's-draft-date-1-january-1970">Editor's Draft 3 October 2012</h2>
1.85 mike 334: </div>
1.191 ! mike 335: <nav class="prev_next">
1.1 mike 336: <a href="text-level-semantics.html">← 4.6 Text-level semantics</a> –
1.191 ! mike 337: <a href="index.html#contents">Table of contents</a> –
1.1 mike 338: <a href="the-em-element.html">4.6.2 The em element →</a>
1.191 ! mike 339: </nav>
1.1 mike 340:
1.85 mike 341: <h4 id="the-a-element"><span class="secno">4.6.1 </span>The <dfn><code>a</code></dfn> element</h4>
342:
343: <dl class="element"><dt><a href="element-definitions.html#element-dfn-categories" title="element-dfn-categories">Categories</a>:</dt>
1.159 sruby 344: <dd><a href="content-models.html#flow-content-1">Flow content</a>.</dd>
1.179 sruby 345: <dd><a href="content-models.html#phrasing-content-1">Phrasing content</a>.</dd>
1.159 sruby 346: <dd><a href="content-models.html#interactive-content-0">Interactive content</a>.</dd>
347: <dd><a href="content-models.html#palpable-content-0">Palpable content</a>.</dd>
1.25 mike 348: <dt><a href="element-definitions.html#element-dfn-contexts" title="element-dfn-contexts">Contexts in which this element can be used</a>:</dt>
1.179 sruby 349: <dd>Where <a href="content-models.html#phrasing-content-1">phrasing content</a> is expected.</dd>
1.25 mike 350: <dt><a href="element-definitions.html#element-dfn-content-model" title="element-dfn-content-model">Content model</a>:</dt>
1.159 sruby 351: <dd><a href="content-models.html#transparent">Transparent</a>, but there must be no <a href="content-models.html#interactive-content-0">interactive content</a> descendant.</dd>
1.25 mike 352: <dt><a href="element-definitions.html#element-dfn-attributes" title="element-dfn-attributes">Content attributes</a>:</dt>
1.1 mike 353: <dd><a href="global-attributes.html#global-attributes">Global attributes</a></dd>
354: <dd><code title="attr-hyperlink-href"><a href="links.html#attr-hyperlink-href">href</a></code></dd>
355: <dd><code title="attr-hyperlink-target"><a href="links.html#attr-hyperlink-target">target</a></code></dd>
1.159 sruby 356: <!--DOWNLOAD--><!--PING-->
1.1 mike 357: <dd><code title="attr-hyperlink-rel"><a href="links.html#attr-hyperlink-rel">rel</a></code></dd>
358: <dd><code title="attr-hyperlink-media"><a href="links.html#attr-hyperlink-media">media</a></code></dd>
359: <dd><code title="attr-hyperlink-hreflang"><a href="links.html#attr-hyperlink-hreflang">hreflang</a></code></dd>
360: <dd><code title="attr-hyperlink-type"><a href="links.html#attr-hyperlink-type">type</a></code></dd>
1.159 sruby 361: <dt><a href="element-definitions.html#element-dfn-dom" title="element-dfn-dom">DOM interface</a>:</dt><!--TOPIC:DOM APIs-->
1.1 mike 362: <dd>
363: <pre class="idl">interface <dfn id="htmlanchorelement">HTMLAnchorElement</dfn> : <a href="elements.html#htmlelement">HTMLElement</a> {
364: stringifier attribute DOMString <a href="#dom-a-href" title="dom-a-href">href</a>;
365: attribute DOMString <a href="#dom-a-target" title="dom-a-target">target</a>;
1.159 sruby 366: <!--DOWNLOAD--><!--PING-->
1.1 mike 367: attribute DOMString <a href="#dom-a-rel" title="dom-a-rel">rel</a>;
368: readonly attribute <a href="infrastructure.html#domtokenlist">DOMTokenList</a> <a href="#dom-a-rellist" title="dom-a-relList">relList</a>;
369: attribute DOMString <a href="#dom-a-media" title="dom-a-media">media</a>;
370: attribute DOMString <a href="#dom-a-hreflang" title="dom-a-hreflang">hreflang</a>;
371: attribute DOMString <a href="#dom-a-type" title="dom-a-type">type</a>;
372:
373: attribute DOMString <a href="#dom-a-text" title="dom-a-text">text</a>;
374:
375: // <a href="urls.html#url-decomposition-idl-attributes">URL decomposition IDL attributes</a>
376: attribute DOMString <a href="#dom-a-protocol" title="dom-a-protocol">protocol</a>;
377: attribute DOMString <a href="#dom-a-host" title="dom-a-host">host</a>;
378: attribute DOMString <a href="#dom-a-hostname" title="dom-a-hostname">hostname</a>;
379: attribute DOMString <a href="#dom-a-port" title="dom-a-port">port</a>;
380: attribute DOMString <a href="#dom-a-pathname" title="dom-a-pathname">pathname</a>;
381: attribute DOMString <a href="#dom-a-search" title="dom-a-search">search</a>;
382: attribute DOMString <a href="#dom-a-hash" title="dom-a-hash">hash</a>;
383: };</pre>
384: </dd>
1.159 sruby 385: </dl><!--TOPIC:HTML--><p>If the <code><a href="#the-a-element">a</a></code> element has an <code title="attr-hyperlink-href"><a href="links.html#attr-hyperlink-href">href</a></code> attribute, then it
1.1 mike 386: <a href="rendering.html#represents">represents</a> a <a href="links.html#hyperlink">hyperlink</a> (a hypertext
1.85 mike 387: anchor).</p>
388:
1.159 sruby 389: <!-- v2: Eric Meyer requests the ability to nest links so that a big
390: hyperlink, e.g. representing a calendar event, can be clickable,
391: while within it there are subareas that represent links to distinct
392: areas, e.g. a link to see photos of the event, or to edit the event,
393: or some such. -->
1.85 mike 394:
395: <p>If the <code><a href="#the-a-element">a</a></code> element has no <code title="attr-hyperlink-href"><a href="links.html#attr-hyperlink-href">href</a></code> attribute, then the element
1.1 mike 396: <a href="rendering.html#represents">represents</a> a placeholder for where a link might
1.85 mike 397: otherwise have been placed, if it had been relevant.</p>
398:
399: <p>The <code title="attr-hyperlink-target"><a href="links.html#attr-hyperlink-target">target</a></code>,
1.159 sruby 400: <!--DOWNLOAD--><!--PING-->
1.1 mike 401: <code title="attr-hyperlink-rel"><a href="links.html#attr-hyperlink-rel">rel</a></code>, <code title="attr-hyperlink-media"><a href="links.html#attr-hyperlink-media">media</a></code>, <code title="attr-hyperlink-hreflang"><a href="links.html#attr-hyperlink-hreflang">hreflang</a></code>, and <code title="attr-hyperlink-type"><a href="links.html#attr-hyperlink-type">type</a></code> attributes must be omitted
402: if the <code title="attr-hyperlink-href"><a href="links.html#attr-hyperlink-href">href</a></code> attribute is
1.85 mike 403: not present.</p>
404:
1.159 sruby 405: <!--MD-->
1.85 mike 406:
407: <div class="example">
1.1 mike 408: <p>If a site uses a consistent navigation toolbar on every page,
409: then the link that would normally link to the page itself could be
410: marked up using an <code><a href="#the-a-element">a</a></code> element:</p>
411: <pre><nav>
412: <ul>
413: <li> <a href="/">Home</a> </li>
414: <li> <a href="/news">News</a> </li>
415: <li> <a>Examples</a> </li>
416: <li> <a href="/legal">Legal</a> </li>
417: </ul>
418: </nav></pre>
1.85 mike 419: </div>
420:
421: <div class="impl">
1.1 mike 422:
423: <p>The <code title="attr-hyperlink-href"><a href="links.html#attr-hyperlink-href">href</a></code>,
424: <code title="attr-hyperlink-target"><a href="links.html#attr-hyperlink-target">target</a></code>,
1.159 sruby 425: <!--DOWNLOAD--><!--PING-->
426: attributes affect what happens when users <a href="links.html#following-hyperlinks-0" title="following
1.1 mike 427: hyperlinks">follow hyperlinks</a>
1.159 sruby 428: <!--DOWNLOAD-->
1.1 mike 429: created using the <code><a href="#the-a-element">a</a></code> element. The
430: <code title="attr-hyperlink-rel"><a href="links.html#attr-hyperlink-rel">rel</a></code>, <code title="attr-hyperlink-media"><a href="links.html#attr-hyperlink-media">media</a></code>, <code title="attr-hyperlink-hreflang"><a href="links.html#attr-hyperlink-hreflang">hreflang</a></code>, and <code title="attr-hyperlink-type"><a href="links.html#attr-hyperlink-type">type</a></code> attributes may be used to
431: indicate to the user the likely nature of the target resource before
432: the user follows the link.</p>
433:
434: <p>The <a href="content-models.html#activation-behavior">activation behavior</a> of <code><a href="#the-a-element">a</a></code> elements
435: that create <a href="links.html#hyperlink" title="hyperlink">hyperlinks</a> is to run the
436: following steps:</p>
437:
438: <ol><li><p>If the algorithm is not <a href="browsers.html#allowed-to-show-a-pop-up">allowed to show a
439: pop-up</a> and either the <code><a href="#the-a-element">a</a></code>
1.159 sruby 440: <!--DOWNLOAD-->
1.1 mike 441: element's <code title="attr-hyperlink-target"><a href="links.html#attr-hyperlink-target">target</a></code>
442: attribute is present and applying <a href="browsers.html#the-rules-for-choosing-a-browsing-context-given-a-browsing-context-name">the rules for choosing a
443: browsing context given a browsing context name</a>, using the
444: value of the <code title="attr-hyperlink-target"><a href="links.html#attr-hyperlink-target">target</a></code>
445: attribute as the browsing context name, would result in there not
446: being a chosen browsing context, then throw an
447: <code><a href="infrastructure.html#invalidaccesserror">InvalidAccessError</a></code> exception and abort these
448: steps.</p></li>
449:
450: <li><p>If the target of the <code title="event-click"><a href="infrastructure.html#event-click">click</a></code>
451: event is an <code><a href="the-img-element.html#the-img-element">img</a></code> element with an <code title="attr-img-ismap"><a href="the-img-element.html#attr-img-ismap">ismap</a></code> attribute specified, then
452: server-side image map processing must be performed, as follows:</p>
453:
1.159 sruby 454: <ol><!-- http://software.hixie.ch/utilities/js/live-dom-viewer/?%3C%21DOCTYPE%20html%3E%0A...%3Ca%20href%3D%22%23%22%3E%3Cimg%20ismap%20usemap%3D%22%23a%22%20src%3D/resources/images/smallcats%3E%3C/a%3E%0A%3Cmap%20name%3Da%3E%3Carea%20shape%3Drect%20coords%3D0%2C0%2C50%2C50%20href%3Db%3E%3C/map%3E --><li>If the <code title="event-click"><a href="infrastructure.html#event-click">click</a></code> event was a
1.1 mike 455: real pointing-device-triggered <code title="event-click"><a href="infrastructure.html#event-click">click</a></code> event on the <code><a href="the-img-element.html#the-img-element">img</a></code>
456: element, then let <var title="">x</var> be the distance in CSS
457: pixels from the left edge of the image's left border, if it has
458: one, or the left edge of the image otherwise, to the location of
459: the click, and let <var title="">y</var> be the distance in CSS
460: pixels from the top edge of the image's top border, if it has
461: one, or the top edge of the image otherwise, to the location of
462: the click. Otherwise, let <var title="">x</var> and <var title="">y</var> be zero.</li>
463:
464: <li>Let the <dfn id="hyperlink-suffix"><var>hyperlink suffix</var></dfn> be a U+003F
465: QUESTION MARK character, the value of <var title="">x</var>
1.85 mike 466: expressed as a base-ten integer using ASCII digits, a "," (U+002C) character, and the value of <var title="">y</var>
1.1 mike 467: expressed as a base-ten integer using ASCII digits. ASCII digits
1.161 sruby 468: are the characters in the range <a href="common-microsyntaxes.html#ascii-digits">ASCII digits</a>.</li>
1.1 mike 469:
470: </ol></li>
471:
1.159 sruby 472: <li><p>Finally, the user agent must <a href="links.html#following-hyperlinks-0" title="following
1.1 mike 473: hyperlinks">follow the hyperlink</a>
1.159 sruby 474: <!--DOWNLOAD-->
1.1 mike 475: created by the <code><a href="#the-a-element">a</a></code> element, as determined by
1.159 sruby 476: <!--DOWNLOAD-->
1.1 mike 477: any expressed user preference. If the steps above defined a
478: <var><a href="#hyperlink-suffix">hyperlink suffix</a></var>, then take that into account when
479: following or downloading the hyperlink.</p></li>
480:
1.85 mike 481: </ol></div>
482:
1.159 sruby 483: <!--TOPIC:DOM APIs-->
1.85 mike 484: <dl class="domintro"><dt><var title="">a</var> . <code title="dom-a-text"><a href="#dom-a-text">text</a></code></dt>
1.1 mike 485:
486: <dd>
487:
488: <p>Same as <code><a href="infrastructure.html#textcontent">textContent</a></code>.</p>
489:
490: </dd>
491:
492: </dl><div class="impl">
493:
494: <p>The IDL attributes
495: <dfn id="dom-a-href" title="dom-a-href"><code>href</code></dfn>,
1.159 sruby 496: <!--DOWNLOAD--><!--PING-->
1.1 mike 497: <dfn id="dom-a-target" title="dom-a-target"><code>target</code></dfn>, <dfn id="dom-a-rel" title="dom-a-rel"><code>rel</code></dfn>, <dfn id="dom-a-media" title="dom-a-media"><code>media</code></dfn>, <dfn id="dom-a-hreflang" title="dom-a-hreflang"><code>hreflang</code></dfn>, and <dfn id="dom-a-type" title="dom-a-type"><code>type</code></dfn>, must
498: <a href="common-dom-interfaces.html#reflect">reflect</a> the respective content attributes of the same
499: name.</p>
500:
501: <p>The IDL attribute <dfn id="dom-a-rellist" title="dom-a-rellist"><code>relList</code></dfn> must
502: <a href="common-dom-interfaces.html#reflect">reflect</a> the <code title="attr-hyperlink-rel"><a href="links.html#attr-hyperlink-rel">rel</a></code>
503: content attribute.</p>
504:
505: <p>The <dfn id="dom-a-text" title="dom-a-text"><code>text</code></dfn> IDL
506: attribute, on getting, must return the same value as the
507: <code><a href="infrastructure.html#textcontent">textContent</a></code> IDL attribute on the element, and on
508: setting, must act as if the <code><a href="infrastructure.html#textcontent">textContent</a></code> IDL attribute
509: on the element had been set to the new value.</p>
510:
511: <p>The <code><a href="#the-a-element">a</a></code> element also supports the complement of
512: <a href="urls.html#url-decomposition-idl-attributes">URL decomposition IDL attributes</a>, <dfn id="dom-a-protocol" title="dom-a-protocol"><code>protocol</code></dfn>, <dfn id="dom-a-host" title="dom-a-host"><code>host</code></dfn>, <dfn id="dom-a-port" title="dom-a-port"><code>port</code></dfn>, <dfn id="dom-a-hostname" title="dom-a-hostname"><code>hostname</code></dfn>, <dfn id="dom-a-pathname" title="dom-a-pathname"><code>pathname</code></dfn>, <dfn id="dom-a-search" title="dom-a-search"><code>search</code></dfn>, and <dfn id="dom-a-hash" title="dom-a-hash"><code>hash</code></dfn>. These must follow the
513: rules given for <a href="urls.html#url-decomposition-idl-attributes">URL decomposition IDL attributes</a>, with
514: the <a href="urls.html#concept-uda-input" title="concept-uda-input">input</a> being the result of
515: <a href="urls.html#resolve-a-url" title="resolve a url">resolving</a> the element's <code title="attr-hyperlink-href"><a href="links.html#attr-hyperlink-href">href</a></code> attribute relative to the
516: element, if there is such an attribute and resolving it is
517: successful, or the empty string otherwise; and the <a href="urls.html#concept-uda-setter" title="concept-uda-setter">common setter action</a> being the
518: same as setting the element's <code title="attr-hyperlink-href"><a href="links.html#attr-hyperlink-href">href</a></code> attribute to the new output
519: value.</p>
520:
1.85 mike 521: </div>
1.159 sruby 522: <!--TOPIC:HTML-->
1.85 mike 523:
524: <div class="example">
1.1 mike 525:
526: <p>The <code><a href="#the-a-element">a</a></code> element may be wrapped around entire
527: paragraphs, lists, tables, and so forth, even entire sections, so
528: long as there is no interactive content within (e.g. buttons or
529: other links). This example shows how this can be used to make an
530: entire advertising block into a link:</p>
531:
532: <pre><aside class="advertising">
533: <h1>Advertising</h1>
534: <a href="http://ad.example.com/?adid=1929&amp;pubid=1422">
535: <section>
536: <h1>Mellblomatic 9000!</h1>
537: <p>Turn all your widgets into mellbloms!</p>
538: <p>Only $9.99 plus shipping and handling.</p>
539: </section>
540: </a>
541: <a href="http://ad.example.com/?adid=375&amp;pubid=1422">
542: <section>
543: <h1>The Mellblom Browser</h1>
544: <p>Web browsing at the speed of light.</p>
545: <p>No other browser goes faster!</p>
546: </section>
547: </a>
548: </aside></pre>
549:
1.85 mike 550: </div>
551:
552:
553: </body></html>
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