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| h { | |
| display: block; | |
| } | |
| h6, h { | |
| font-size: 0.67em; | |
| margin: 2.33em 0; | |
| } | |
| h5, h[level="5"] { | |
| font-size: 0.83em; | |
| margin: 1.67em 0; | |
| } | |
| h4, h[level="4"] { | |
| font-size: 1em; | |
| margin: 1.33em 0; | |
| } | |
| h3, h[level="3"] { | |
| font-size: 1.17em; | |
| margin: 1em 0; | |
| } | |
| h2, h[level="2"] { | |
| font-size: 1.5em; | |
| margin: 0.83em 0; | |
| } | |
| h1, h[level="1"] { | |
| font-size: 2em; | |
| margin: 0.67em 0; | |
| } |
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| (function (nodeName, sectionRE) { | |
| function defineHeading(node) { | |
| // initialize heading level as 1 | |
| var level = 1, parent = node; | |
| // while parent element exists | |
| while (parent = parent.parentElement) { | |
| // if parent element is a sectioning element | |
| if (sectionRE.test(parent.nodeName)) { | |
| // increase heading level | |
| ++level; | |
| } | |
| } | |
| // IE9-11 DOMSubtreeModified needs a timeout | |
| setTimeout(function () { | |
| // define heading role | |
| node.setAttribute('role', 'heading'); | |
| // define heading level | |
| node.setAttribute('level', level); | |
| node.setAttribute('aria-level', level); | |
| }); | |
| } | |
| function defineHeadings() { | |
| Array.prototype.forEach.call(document.getElementsByTagName(nodeName), defineHeading); | |
| } | |
| // if heading is an unknown element | |
| if (document.createElement(nodeName) instanceof HTMLUnknownElement) { | |
| defineHeadings(); | |
| document.addEventListener('DOMContentLoaded', defineHeadings); | |
| document.addEventListener('DOMSubtreeModified', defineHeadings); | |
| } | |
| })('h', /^(article|aside|nav|section)$/i); |
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| (function (nodeName, sectionRE) { | |
| function defineHeading(node) { | |
| // initialize heading level as 1 | |
| var level = 1, parent = node; | |
| // while parent element exists | |
| while (parent = parent.parentElement) { | |
| // if parent element is a sectioning element | |
| if (sectionRE.test(parent.nodeName)) { | |
| // increase heading level | |
| ++level; | |
| } | |
| } | |
| // IE9-11 DOMSubtreeModified needs a timeout | |
| setTimeout(function () { | |
| // define heading role | |
| node.setAttribute('role', 'heading'); | |
| // define heading level | |
| node.setAttribute('level', level); | |
| node.setAttribute('aria-level', level); | |
| }); | |
| } | |
| function defineHeadings() { | |
| for (var all = document.getElementsByTagName(nodeName), index = 0; all[index]; ++index) { | |
| defineHeading(all[index]); | |
| } | |
| } | |
| // if heading is an unknown element | |
| if (document.addEventListener) { | |
| if (document.createElement(nodeName) instanceof HTMLUnknownElement) { | |
| defineHeadings(); | |
| document.addEventListener('DOMContentLoaded', defineHeadings); | |
| document.addEventListener('DOMSubtreeModified', defineHeadings); | |
| } | |
| } | |
| // or this is Internet Explorer | |
| else { | |
| document.createElement(nodeName); | |
| document.attachEvent('onreadystatechange', defineHeadings); | |
| document.attachEvent('onpropertychange', defineHeadings); | |
| } | |
| })('h', /^(article|aside|nav|section)$/i); |
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| <!DOCTYPE html> | |
| <html lang="en"> | |
| <head> | |
| <meta charset="UTF-8"> | |
| <title>h Demo</title> | |
| <script src="h.js"></script> | |
| <link rel="stylesheet" href="h.css"> | |
| </head> | |
| <body unresolved> | |
| <h>Ramones: Hey! Ho! Let's Go</h> | |
| <div class="excode"> | |
| <p><strong>code:</strong></p> | |
| <pre><code><h>Ramones: Hey! Ho! Let's Go</h></code></pre> | |
| </div> | |
| <h>Heading text level 1</h> | |
| <section><h>Heading text level 2</h> | |
| <section><h>Heading text level 3</h> | |
| <section><h>Heading text level 4</h> | |
| <section><h>Heading text level 5</h> | |
| <section><h>Heading text level 6</h> | |
| </section> | |
| </section> | |
| </section> | |
| </section> | |
| </section> | |
| <div class="excode"> | |
| <p><strong>code:</strong></p> | |
| <pre><code><h>Heading text level 1</h> | |
| <section><h>Heading text level 2</h> | |
| <section><h>Heading text level 3</h> | |
| <section><h>Heading text level 4</h> | |
| <section><h>Heading text level 5</h> | |
| <section><h>Heading text level 6</h> | |
| </section> | |
| </section> | |
| </section> | |
| </section> | |
| </section></code></pre> | |
| </div> | |
| </body> | |
| </html> |
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