HTML5

HTML5 is the fifth major version of the HyperText Markup Language, first finalized as a W3C recommendation in 2014. The term now generally means modern HTML as maintained by the WHATWG as a continuously updated living standard, together with the browser APIs around it.

Why it matters

HTML5 removed the need for many plugins. It introduced semantic elements such as <header>, <nav>, <main>, <article> and <footer>, native <video> and <audio>, <canvas>, richer form input types, and APIs including local storage, geolocation, drag and drop, and web workers. It also defined how browsers parse invalid markup, which improved consistency between browsers and ended the era of Flash for most media.

Example

<!DOCTYPE html>
<html lang="en">
<body>
  <header><nav>...</nav></header>
  <main>
    <article>
      <h1>Title</h1>
      <video controls src="clip.mp4"></video>
      <input type="date" name="when">
    </article>
  </main>
</body>
</html>

Common misconceptions

• HTML5 is not a set of CSS3 or JavaScript features; those are separate technologies, though often bundled in the term.
• "HTML5 compatible" does not mean every feature works in every browser; check support.
• Semantic tags do not add styling by themselves.

Related

• HTML
• Semantic HTML
• Canvas element
• DOCTYPE declaration

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