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# Autoprefixer [![Cult Of Martians][cult-img]][cult]

[PostCSS] plugin to parse CSS and add vendor prefixes to CSS rules using values
from [Can I Use]. It is recommended by Google and used in Twitter and Alibaba.

Write your CSS rules without vendor prefixes (in fact, forget about them
entirely):

```css
::placeholder {
  color: gray;
}

.image {
  background-image: url(image@1x.png);
}
@media (min-resolution: 2dppx) {
  .image {
    background-image: url(image@2x.png);
  }
}
```

Autoprefixer will use the data based on current browser popularity and property
support to apply prefixes for you. You can try the [interactive demo]
of Autoprefixer.

```css
::-moz-placeholder {
  color: gray;
}
:-ms-input-placeholder {
  color: gray;
}
::placeholder {
  color: gray;
}

.image {
  background-image: url(image@1x.png);
}
@media (-webkit-min-device-pixel-ratio: 2),
       (min-resolution: 2dppx) {
  .image {
    background-image: url(image@2x.png);
  }
}
```

Twitter account for news and releases: [@autoprefixer].

[interactive demo]: https://autoprefixer.github.io/
[@autoprefixer]:    https://twitter.com/autoprefixer
[Can I Use]:        https://caniuse.com/
[cult-img]:         http://cultofmartians.com/assets/badges/badge.svg
[PostCSS]:          https://github.com/postcss/postcss
[cult]:             http://cultofmartians.com/tasks/autoprefixer-grid.html

## Docs
Read **[full docs](https://github.com/postcss/autoprefixer#readme)** on GitHub.

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