# [postcss][postcss]-merge-longhand > Merge longhand properties into shorthand with PostCSS. ## Install With [npm](https://npmjs.org/package/postcss-merge-longhand) do: ``` npm install postcss-merge-longhand --save ``` ## Example Merge longhand properties into shorthand; works with `margin`, `padding` & `border`. For more examples see the [tests](src/__tests__/index.js). ### Input ```css h1 { margin-top: 10px; margin-right: 20px; margin-bottom: 10px; margin-left: 20px; } ``` ### Output ```css h1 { margin: 10px 20px; } ``` ## 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