postcss-import

PostCSS plugin to import CSS files

postcss-import

PostCSS plugin to transform @import rules by inlining content.

This plugin can consume local files, node modules or bower packages. To resolve path of an @import rule, it can look into root directory (by default process.cwd()), node_modules, web_modules, bower_components or local modules. You can also provide manually multiples paths where to look at.

Notes:

  • This plugin works great with postcss-url plugin, which will allow you to adjust assets url() (or even inline them) after inlining imported files.
  • In order to optimize output, this plugin will only import a file once on a given scope (root, media query...). Tests are made from the path & the content of imported files (using a hash table). If this behavior is not what you want, look at skipDuplicates option
$ npm install postcss-import

If your stylesheets are not in the same place where you run postcss (process.cwd()), you will need to use from option to make relative imports work from input dirname.

// dependencies 
var fs = require("fs")
var postcss = require("postcss")
var atImport = require("postcss-import")
 
// css to be processed 
var css = fs.readFileSync("css/input.css", "utf8")
 
// process css 
var output = postcss()
  .use(atImport())
  .process(css, {
    // `from` option is required so relative import can work from input dirname 
    from: "css/input.css"
  })
  .css
 
console.log(output)

Using this input.css:

/* can consume `node_modules`, `web_modules`, `bower_components` or local modules */
@import "cssrecipes-defaults"/* == @import "./node_modules/cssrecipes-defaults/index.css"; */
 
@import "normalize.css/normalize"/* == @import "./bower_components/normalize.css/normalize.css"; */
 
@import "css/foo.css"/* relative to stylesheets/ according to `from` option above */
 
@import "css/bar.css" (min-width: 25em);
 
body {
  background: black;
}

will give you:

/* ... content of ./node_modules/my-css-on-npm/index.css */
 
/* ... content of ./bower_components/my-css-on-bower/index.css */
 
/* ... content of foo.css */
 
@media (min-width: 25em) {
/* ... content of bar.css */
}
 
body {
  background: black;
}

Checkout tests for more examples.

Type: String
Default: process.cwd()

Define the root where to resolve path (eg: place where node_modules and bower_components are). Should not be used that much.

Type: String|Array
Default: process.cwd() or dirname of the postcss from

A string or an array of paths in where to look for files.
Note: nested @import will additionally benefit of the relative dirname of imported files.

Type: Boolean
Default: false

Allow to enable PostCSS async API usage. Before enabling this, check that your runner allow async usage. Note: this is not enabling async fs read yet.

Type: Function
Default: null

A function to transform the content of imported files. Take one argument (file content) & should return the modified content.

Type: Array
Default: undefined

An array of plugins to be applied on each imported file.

Type: String
Default: utf8

Use if your CSS is encoded in anything other than UTF-8.

Type: Function
Default: null

Function called after the import process. Take one argument (array of imported files).

Type: Boolean
Default: false

Set to true if you want @import rules to parse glob patterns.

Type: Function
Default: null

You can overwrite the default path resolving way by setting this option, using the resolve.sync(id, opts) signature that resolve.sync has.

Type: Boolean
Default: true

By default, similar files (based on the same content) are being skipped. It's to optimize output and skip similar files like normalize.css for example. If this behavior is not what you want, just set this option to false to disable it.

var postcss = require("postcss")
var atImport = require("postcss-import")
 
var css = postcss()
  .use(atImport({
    path: ["src/css"]
    transform: require("css-whitespace")
  }))
  .process(cssString)
  .css

Work on a branch, install dev-dependencies, respect coding style & run tests before submitting a bug fix or a feature.

$ git clone https://github.com/postcss/postcss-import.git
$ git checkout -b patch-1
$ npm install
$ npm test

Changelog

License