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Break free from CSS prefix hell!

-prefix-free lets you use only unprefixed CSS properties everywhere. It works behind the scenes, adding the current browser’s prefix to any CSS code, only when it’s needed.

“[-prefix-free is] fantastic, top-notch work! Thank you for creating and sharing it.”
— Eric Meyer

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Processes every stylesheet in <link> or <style> elements and adds a vendor prefix where needed
Processes elements with a style attribute and adds a vendor prefix where needed
Takes care of new <link> or <style> elements, style attribute changes and CSSOM changes (requires plugin)
Lets jQuery’s .css() method get and set unprefixed properties (requires plugin)

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Prefixing code in @import-ed files is not supported
Prefixing cross-origin linked stylesheets is not supported, unless they are CORS-enabled
Unprefixed linked stylesheets won’t work locally in Chrome and Opera. You can change that for yourself though.
Unprefixed values in inline styles (in the style attribute) won’t work in IE and Firefox < 3.6. Properties as well in Firefox < 3.6.

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Check this page’s stylesheet ;-)

You can also visit the Test Drive page, type in any code you want and check out how it would get prefixed for the current browser.

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Just include prefixfree.js anywhere in your page. It is recommended to put it right after the stylesheets, to minimize FOUC

That’s it, you’re done!

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The target browser support is IE9+, Opera 10+, Firefox 3.5+, Safari 4+ and Chrome on desktop and Mobile Safari, Android browser, Chrome and Opera Mobile on mobile.

If it doesn’t work in any of those, it’s a bug so please report it. Just before you do, please make sure that it’s not because the browser doesn’t support a CSS3 feature at all, even with a prefix.

In older browsers like IE8, nothing will break, just properties won’t get prefixed. Which wouldn’t be useful anyway as IE8 doesn’t support much CSS3 ;)

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Test the prefixing that -prefix-free would do for this browser, by writing some CSS below:

VK smiled, a wolfish expression that didn't reach his eyes. "The ledger. Always business. You know, in the old country, we would share a drink before discussing business. It is civilized."

Therefore, one of the following is true:

Afterward, in the quiet of the empty ballroom, the tension finally snapped. "You were amazing," she whispered, adjusting his tie.

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VK smiled, a wolfish expression that didn't reach his eyes. "The ledger. Always business. You know, in the old country, we would share a drink before discussing business. It is civilized."

Therefore, one of the following is true:

Afterward, in the quiet of the empty ballroom, the tension finally snapped. "You were amazing," she whispered, adjusting his tie.