npm

Need private packages and team management tools?Check out npm Orgs. »

postcss-prefix-selector

1.7.2 • Public • Published

postcss-prefix-selector

Greenkeeper badge NPM version Build status Test coverage Dependency Status License Downloads

Prefix every CSS selector with a custom namespace .a => .prefix .a

Table of Contents

Install

$ npm install postcss-prefix-selector

Usage with PostCSS

const prefixer = require('postcss-prefix-selector')
 
// css to be processed
const css = fs.readFileSync("input.css", "utf8")
 
const out = postcss().use(prefixer({
  prefix: '.some-selector',
  exclude: ['.c'],
 
  // Optional transform callback for case-by-case overrides
  transform: function (prefix, selector, prefixedSelector) {
    if (selector === 'body') {
      return 'body' + prefix;
    } else {
      return prefixedSelector;
    }
  }
})).process(css).css

Using the options above and the CSS below...

body {
  background: red;
}
 
.a.b {
  color: aqua;
}
 
.c {
  color: coral;
}

You will get the following output

body.some-selector {
  background: red;
}
 
.some-selector .a.some-selector .b {
  color: aqua;
}
 
.c {
  color: coral;
}

Usage with webpack

Use it like you'd use any other PostCSS plugin. If you also have autoprefixer in your webpack config then make sure that postcss-prefix-selector is called first. This is needed to avoid running the prefixer twice on both standard selectors and vendor specific ones (ex: @keyframes and @webkit-keyframes).

const prefixer = require('postcss-prefix-selector');
 
module: {
  rules: [{
    test: /\.css$/,
    use: [
      require.resolve('style-loader'),
      require.resolve('css-loader'),
      {
        loader: require.resolve('postcss-loader'),
        options: {
          plugins: () => [
            prefixer({
              prefix: '.my-prefix'
            }),
            autoprefixer({
              browsers: ['last 4 versions']
            })
          ]
        }
      }
    ]
  }]
}

Options

  • prefix - This string is added before every CSS selector.
  • exclude - It's possible to avoid prefixing some selectors by passing an array of selectors (strings or regular expressions).
  • transform - In cases where you may want to use the prefix differently for different selectors, it is possible to pass in a custom transform method.

Maintainer

This project was originally created by @jongleberry and is being maintained by @RadValentin. If you have any questions, feel free to ping the latter.

Contribute

Please contribute! If you have any questions or bugs, open an issue. Or, open a pull request with a fix.

This project uses Mocha. If you submit a PR, please add appropriate tests and make sure that everything is green for your branch.

License

MIT © 2015-2017 Jonathan Ong.

install

npm i postcss-prefix-selector

Downloadsweekly downloads

120,726

version

1.7.2

license

MIT

homepage

github.com

repository

Gitgithub

last publish

collaborators

  • avatar
  • avatar
  • avatar
Report a vulnerability