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Why do browsers create vendor prefixes for CSS properties?

What is the advantage for browsers to use prefixes to implement some technology?

e.g. Google Chrome needs the -webkit- prefix to render some css3-tags, like animation (it needs "-webkit-animation:" to work).

What is the advantage compared to implementing the technique directly into chrome?

Community
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lindhe
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1 Answers1

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Browsers use prefixes so that they can implement a new features before it gets standardized.

vivek
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    But a browser does not have to use the standards, anything can be implemented in a browser, that's up to the programmers. So why use prefix implementation instead of ordinary implementation (why would non-standard implementations hurt?) – lindhe Jun 04 '12 at 17:31