This is just a short reminder of something I wrote about in On using h1 for all heading levels in HTML5: make sure your HTML5 document outline is backwards compatible.
The reason is simple. Browsers and assistive technology haven’t implemented the HTML5 outline algorithm yet (the only exception I’m aware of is JAWS, which gets it wrong, as Jason Kiss explains in JAWS, IE and Headings in HTML5).
Posted in Accessibility, HTML 5.
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