# [postcss][postcss]-normalize-timing-functions > Normalize timing functions with PostCSS. ## Install With [npm](https://npmjs.org/package/postcss-normalize-timing-functions) do: ``` npm install postcss-normalize-timing-functions --save ``` ## Example ### Input ```css div { animate: fade 3s cubic-bezier(0.42, 0, 1, 1) } ``` ### Output ```css div { animate: fade 3s ease-in } ``` ## Usage See the [PostCSS documentation](https://github.com/postcss/postcss#usage) for examples for your environment. ## Contributors See [CONTRIBUTORS.md](https://github.com/cssnano/cssnano/blob/master/CONTRIBUTORS.md). ## License MIT © [Ben Briggs](http://beneb.info) [postcss]: https://github.com/postcss/postcss