| 1 | # Autoprefixer [![Cult Of Martians][cult-img]][cult]
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| 2 |
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| 3 | <img align="right" width="94" height="71"
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| 4 | src="http://postcss.github.io/autoprefixer/logo.svg"
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| 5 | title="Autoprefixer logo by Anton Lovchikov">
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| 6 |
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| 7 | [PostCSS] plugin to parse CSS and add vendor prefixes to CSS rules using values
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| 8 | from [Can I Use]. It is [recommended] by Google and used in Twitter and Alibaba.
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| 9 |
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| 10 | Write your CSS rules without vendor prefixes (in fact, forget about them
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| 11 | entirely):
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| 12 |
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| 13 | ```css
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| 14 | ::placeholder {
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| 15 | color: gray;
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| 16 | }
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| 17 |
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| 18 | .image {
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| 19 | background-image: url(image@1x.png);
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| 20 | }
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| 21 | @media (min-resolution: 2dppx) {
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| 22 | .image {
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| 23 | background-image: url(image@2x.png);
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| 24 | }
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| 25 | }
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| 26 | ```
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| 27 |
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| 28 | Autoprefixer will use the data based on current browser popularity and property
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| 29 | support to apply prefixes for you. You can try the [interactive demo]
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| 30 | of Autoprefixer.
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| 31 |
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| 32 | ```css
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| 33 | ::-moz-placeholder {
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| 34 | color: gray;
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| 35 | }
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| 36 | :-ms-input-placeholder {
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| 37 | color: gray;
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| 38 | }
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| 39 | ::-ms-input-placeholder {
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| 40 | color: gray;
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| 41 | }
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| 42 | ::placeholder {
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| 43 | color: gray;
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| 44 | }
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| 45 |
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| 46 | .image {
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| 47 | background-image: url(image@1x.png);
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| 48 | }
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| 49 | @media (-webkit-min-device-pixel-ratio: 2),
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| 50 | (min-resolution: 2dppx) {
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| 51 | .image {
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| 52 | background-image: url(image@2x.png);
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| 53 | }
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| 54 | }
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| 55 | ```
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| 56 |
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| 57 | Twitter account for news and releases: [@autoprefixer].
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| 58 |
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| 59 | <a href="https://evilmartians.com/?utm_source=autoprefixer">
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| 60 | <img src="https://evilmartians.com/badges/sponsored-by-evil-martians.svg" alt="Sponsored by Evil Martians" width="236" height="54">
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| 61 | </a>
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| 62 |
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| 63 | [interactive demo]: https://autoprefixer.github.io/
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| 64 | [@autoprefixer]: https://twitter.com/autoprefixer
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| 65 | [recommended]: https://developers.google.com/web/tools/setup/setup-buildtools#dont_trip_up_with_vendor_prefixes
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| 66 | [Can I Use]: https://caniuse.com/
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| 67 | [cult-img]: http://cultofmartians.com/assets/badges/badge.svg
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| 68 | [PostCSS]: https://github.com/postcss/postcss
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| 69 | [cult]: http://cultofmartians.com/tasks/autoprefixer-grid.html
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| 70 |
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| 71 |
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| 72 | ## Docs
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| 73 | Read **[full docs](https://github.com/postcss/autoprefixer#readme)** on GitHub.
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