Semantic HTML

HTML without any styling or functionality should be readable and accessible, and the user should easily be able to discern context about the content. Assistive technologies use the native role, accessible name, and value that is present in semantically appropriate HTML elements, and using the wrong ones can mean lots of extra work and headache in trying to recreate the functionality that already exists.

Some simple examples of semantic elements are the following:



Headings should be used for semantics only, not for font sizing (HTML for structure, CSS for styling).

Heading information can be used by user agents to construct a table of contents for a document automatically.

Use only one <h1> per page or view. It should concisely describe the overall purpose of the content. Using more than one <h1> will not result in an error, but is not considered a best practice. Using only one <h1> is beneficial for screenreader users, and SEO. Avoid skipping heading levels: always start from <h1>, followed by <h2> and so on.


  3. The Periodic Table of Semantics
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