-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
<link> or <style> elements and adds a vendor prefix where neededstyle attribute and adds a vendor prefix where needed<link> or <style> elements, style attribute changes and CSSOM changes (requires plugin).css() method get and set unprefixed properties (requires plugin)@import-ed files is not supportedstyle attribute) won’t work in IE and Firefox < 3.6. Properties as well in Firefox < 3.6.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.
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!
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 ;)
Test the prefixing that -prefix-free would do for this browser, by writing some CSS below:
, was released in November 2025 and is currently the newest major expansion available for online play on New Features in " Crown Childcare Crown Childcare
The latest major expansion, the , was released in late 2025 and is the current focus for players in 2026. Team Terrible | The Baby In Yellow FAQ
| Feature | Online (Free) | Paid Version | |--------|--------------|---------------| | Price | Free | $4.99–$9.99 | | Chapters | 1–3 | 1–3 + extras | | Save progress | Browser cookies only | Cloud save | | Achievements | No | Yes (Steam) | | Offline play | No | Yes |
: Once you're happy with your sketch, start digital painting. Layer your work to allow for easy editing. Use brushes that mimic traditional media or go for more stylized, digital effects.
: This act explores the origins of the baby demons, suggesting they are hatched "from down below" as part of a larger, potentially simulated experiment New Environment
: Create a game design document outlining gameplay mechanics, art style, and technical considerations.
If you’re looking for a game to test your patience (and your bravery), you have to try this. No download needed, just pure chaos!
, was released in November 2025 and is currently the newest major expansion available for online play on New Features in " Crown Childcare Crown Childcare
The latest major expansion, the , was released in late 2025 and is the current focus for players in 2026. Team Terrible | The Baby In Yellow FAQ baby in yellow online play new
| Feature | Online (Free) | Paid Version | |--------|--------------|---------------| | Price | Free | $4.99–$9.99 | | Chapters | 1–3 | 1–3 + extras | | Save progress | Browser cookies only | Cloud save | | Achievements | No | Yes (Steam) | | Offline play | No | Yes | , was released in November 2025 and is
: Once you're happy with your sketch, start digital painting. Layer your work to allow for easy editing. Use brushes that mimic traditional media or go for more stylized, digital effects. Use brushes that mimic traditional media or go
: This act explores the origins of the baby demons, suggesting they are hatched "from down below" as part of a larger, potentially simulated experiment New Environment
: Create a game design document outlining gameplay mechanics, art style, and technical considerations.
If you’re looking for a game to test your patience (and your bravery), you have to try this. No download needed, just pure chaos!