What is postcss-nesting?
The postcss-nesting package is a PostCSS plugin that allows you to use nesting syntax in CSS, similar to what is offered by preprocessors like Sass and Less. It helps to write more readable and maintainable CSS by allowing styles to be nested within one another.
What are postcss-nesting's main functionalities?
Nesting Rules
Allows nesting of selectors within a parent selector, which will be expanded to the equivalent of 'a b { color: black; }'.
a {
& b { color: black; }
}
Nesting Properties
Enables nesting of properties, which is useful for grouping font properties or other related properties together.
a {
font: {
weight: bold;
size: 1em;
family: serif;
}
}
Nesting At-Rules
Supports nesting of at-rules like @media within a selector, which will be processed into the correct CSS syntax.
a {
@media (min-width: 500px) {
color: black;
}
}
Other packages similar to postcss-nesting
postcss-nested
Similar to postcss-nesting, postcss-nested allows for nesting of selectors within CSS. It follows the nesting rules of preprocessors like Sass rather than the CSS Nesting Module.
postcss-preset-env
This package includes postcss-nesting as one of its features, among other future CSS features, and allows you to use them in current browsers.
postcss-scss
This is a syntax plugin for PostCSS that allows you to work with SCSS syntax, including nesting, but it does not compile SCSS. It's useful for linting SCSS with stylelint and PostCSS.
PostCSS Nesting
PostCSS Nesting lets you nest style rules inside each other, following the
CSS Nesting specification.
a, b {
color: red;
& c, & d {
color: white;
}
}
a, b {
color: red;
}
a c, a d, b c, b d {
color: white;
}
Usage
Add PostCSS Nesting to your build tool:
npm install postcss-nesting --save-dev
Node
Use PostCSS Nesting to process your CSS:
require('postcss-nesting').process(YOUR_CSS, { });
PostCSS
Add PostCSS to your build tool:
npm install postcss --save-dev
Use PostCSS Nesting as a plugin:
postcss([
require('postcss-nesting')({ })
]).process(YOUR_CSS, );
Gulp
Add Gulp PostCSS to your build tool:
npm install gulp-postcss --save-dev
Use PostCSS Nesting in your Gulpfile:
var postcss = require('gulp-postcss');
gulp.task('css', function () {
return gulp.src('./src/*.css').pipe(
postcss([
require('postcss-nesting')({ })
])
).pipe(
gulp.dest('.')
);
});
Grunt
Add Grunt PostCSS to your build tool:
npm install grunt-postcss --save-dev
Use PostCSS Nesting in your Gruntfile:
grunt.loadNpmTasks('grunt-postcss');
grunt.initConfig({
postcss: {
options: {
use: [
require('postcss-nesting')({ })
]
},
dist: {
src: '*.css'
}
}
});