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Are XHTML self closing elements still valid in HTML5?

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Happy的楠姐
Happy的楠姐 2021-01-14 11:12

I was wondering if I can write self closing elements like in XHTML in HTML5, for example, can be

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  • 悲哀的现实
    2021-01-14 11:51

    HTML5 can either be coded as XHTML, or as HTML 4. It's flexible that way.

    As to which is the correct way, that's a preference. I suspect that many web designers into standards are used to XHTML and will probably continue to code that way.

    You can go straight to: http://html5.validator.nu/ to validate your code, or if you have the right doctype, the official W3C site will use it for you.

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  • 故里飘歌
    2021-01-14 11:58

    Either will work, just try to be consistent.

    Same goes for quoting attributes - I've read tutorials that discourage quoting one word attribute variables. I would quote them all, at least for consistency (unless you have a popular web app where every byte is precious).

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  • 面向向阳花
    2021-01-14 12:06

    Self-closing tags may lead to some parsing errors. Look at this:

    <!DOCTYPE html>
<html>
<head><title>Title</title></head>
<body>
  <div>
    <p>
      <div/>
    </p>
  </div>
</body>
</html>

    While it is perfectly valid HTML4, it is invalid in HTML5. W3C validation complains about <div/>:

    Self-closing syntax (/>) used on a non-void HTML element. Ignoring the slash and treating as a start tag.

    If innermost self-closed div is treated as start tag, it breaks whole structure, so be careful.

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