ember-cli-css-preprocess
Preprocess your stylesheets with multiple preprocessors.
Currently supported preprocessors:
Please feel free to fork in order to add more processors!
You can determine in which order the stylesheets are processed!
Installation
ember install ember-cli-css-preprocess
Usage
Basic configuration
All the configuration for this plugin is stored in the ember-cli-build.js
in the root-directory of your ember application.
Search for the following lines:
var app = defaults // Add options here ...
And add the the basic options:
var app = defaults // Add options here styleProcessorOptions: processors: extension: 'css' ...
Adding a preprocessor
Currently there a two available preprocessors which you can chain in any order (even multiple times if you want).
Supported processors:
- node-sass
- postcss
- less
To add on simply pass in an object to the processors
-Array containing a type
-Property with the processor title.
Furthermore you have to install the corresponding npm-module with the same name (e.g. npm install autoprefixer --save-dev
).
Adding a Sass Preprocessor:
var app = defaults // Add options here styleProcessorOptions: processors: type: 'node-sass' sourcemaps: true // enables sourcemaps options: {} extension: 'scss' ...
By changing the extension
-property you can specify the extension of your stylesheets. Because we are only processing our sheets with Sass we set the extension to scss
.
Annotation: You can also pass all setting you could pass to node-sass by setting the options
-object in the processor object. By default the only settings are the includePath
which is set to your styles
-folder and the sourcemap settings if sourcemaps
is set to true
. This allows you to include any stylesheet in your folder with the @import
-rule
Adding a PostCSS Preprocessor:
var app = defaults // Add options here styleProcessorOptions: processors: type: 'postcss' plugins: module: options: browsers: 'last 2 versions' extension: 'css' ...
This is a basic postcss implementation using the autoprefixer plugin.
The plugin
-array is filled with objects with the module
and the options
properties. The latter obviously contains the options which are passed into the module/plugin when processing your stylesheets.
Annotation: Before requiring any postcss-plugin you have to install it via npm (e.g. npm install autoprefixer --save
).
You can also add a custom parser or syntax by adding it to the processor object. Here is an example which uses the postcss-scss parser
(for adding a syntax, use the syntax
property):
var app = defaults // Add options here styleProcessorOptions: processors: type: 'postcss' parser: //syntax: require('postcss-scss'), plugins: module: options: browsers: 'last 2 versions' extension: 'css' ...
Adding a less Preprocessor:
var app = defaults // Add options here styleProcessorOptions: processors: type: 'less' extension: 'css' ...
To include any less plugin you can make use of the plugins
-array, it is handled like the postcss-plugin array.
Using multiple processors:
var app = defaults // Add options here styleProcessorOptions: processors: type: 'node-sass' type: 'postcss' plugins: module: options: browsers: 'last 2 versions' extension: 'css' ...
This example should clarify how to chain preprocessors. The position inside the processors
-array determines the order in which the stylesheets are processed by each preprocessors (from top to bottom).
Using multiple input stylesheets
Multiple stylesheets are added by using the outputPaths
-property (, which is not part of the styleProcessorOptions
-property).
Configuring Output Paths (Ember CLI Reference)
In addition to the default configuration you can add an extension to your css
-value.
... // styleProcessorOptions extension: 'scss' // specified extension, overrides default: css } outputPaths: app: css: 'app': 'assets/lel.css' // will parse app/styles/app.scss 'amk.css': 'assets/toll.css' //will parse app/styles/amk.css 'hippo.less': 'assets/eichhorn.css' //will parse app/styles/hippo.less 'trolol/bars': 'assets/foo.css' //will parse app/trolol/bars.scss
Setup processor to parse specific files only (Filter):
var app = defaults // Add options here styleProcessorOptions: processors: type: 'postcss' filter: 'test.css' plugins: module: options: browsers: 'last 2 versions' type: 'node-sass' extension: 'css' ...
With this setup the postcss processor will only process the file test.css
. The filter
property can either be a string or an array of strings.
An example for using the glob pattern:
var app = defaults // Add options here styleProcessorOptions: processors: type: 'node-sass' filter: '*.scss' type: 'less' filter: '*.less' extension: 'css' outputPaths: app: css: 'app': 'assets/lel.css' // input file contents will equal input file contents 'amk.css': 'assets/toll.css' // input file contents will equal input file contents 'hippo.less': 'assets/eichhorn.css' // will only be processed by less processor 'trolol.scss': 'assets/foo.css' // will only be processed by less processor ...