Why doesn't web browsers have built in validators?

Posted by August Karlstrom on Stack Overflow See other posts from Stack Overflow or by August Karlstrom
Published on 2010-05-08T20:07:20Z Indexed on 2010/05/08 20:18 UTC
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Filed under:

browser

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validation

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firefox

As far as I know there is no web browser with built in validators for HTML, CSS and Javascript. Developing web pages without validation is like using a compiler that doesn't do syntax analysis. Even Firefox with its excellent plugins aimed at developers like Firebug lacks plugins for CSS and Javascript validation. Wouldn't it be useful to have these plugins? Am I missing something?

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