CSS To Nest

[![NPM Version][npm-img]][npm] [![Build Status][ci-img]][ci]

[CSS To Nest] transforms unnested CSS into nested CSS, following the [CSS Nesting Module] specification. This might be helpful for updating a project with a single file of legacy CSS.

``css
/ before /
.foo .bar {
color: blue;
}

.foo .bar .pre.mon {
color: white;
}

.foo .bar .pre {
color: red;
}

/ after /
.foo {
@nest & .bar {
color: blue;

@nest & .pre {
color: red;

@nest &.mon {
color: white;
}
}
}
}
`

Usage

Add [CSS To Nest] to your build tool:

`bash
npm install postcss-to-nest --save-dev
`

#### Node

`js
require('postcss-to-nest').process(YOUR_CSS, { / options / });
`

#### PostCSS

Add [PostCSS] to your build tool:

`bash
npm install postcss --save-dev
`

Load [CSS To Nest] as a PostCSS plugin:

`js
postcss([
require('postcss-to-nest')({ / options / })
]).process(YOUR_CSS, / options /);
`

#### Gulp

Add [Gulp PostCSS] to your build tool:

`bash
npm install gulp-postcss --save-dev
`

Enable [CSS To Nest] within your Gulpfile:

`js
var postcss = require('gulp-postcss');

gulp.task('css', function () {
return gulp.src('./src/*.css').pipe(
postcss([
require('postcss-to-nest')({ / options / })
])
).pipe(
gulp.dest('.')
);
});
`

#### Grunt

Add [Grunt PostCSS] to your build tool:

`bash
npm install grunt-postcss --save-dev
`

Enable [CSS To Nest] within your Gruntfile:

`js
grunt.loadNpmTasks('grunt-postcss');

grunt.initConfig({
postcss: {
options: {
use: [
require('postcss-to-nest')({ / options / })
]
},
dist: {
src: '*.css'
}
}
});
``

[ci]: https://travis-ci.org/jonathantneal/postcss-to-nest
[ci-img]: https://img.shields.io/travis/jonathantneal/postcss-to-nest.svg
[npm]: https://www.npmjs.com/package/postcss-to-nest
[npm-img]: https://img.shields.io/npm/v/postcss-to-nest.svg

[Gulp PostCSS]: https://github.com/postcss/gulp-postcss
[Grunt PostCSS]: https://github.com/nDmitry/grunt-postcss
[PostCSS]: https://github.com/postcss/postcss

[CSS Nesting Module]: https://tabatkins.github.io/specs/css-nesting/

[CSS To Nest]: https://github.com/jonathantneal/postcss-to-nest