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Grunt task to lint and minify CSS or LESS

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Grunt task to lint and minify CSS or LESS, using the Twitter RECESS module:

Developed at Twitter to support our internal styleguide, RECESS is a simple, attractive code quality tool for CSS built on top of LESS.

Incorporate it into your development process as a linter, or integrate it directly into your build system as a compiler, RECESS will keep your source looking clean and super manageable.

Getting Started

Install this grunt plugin next to your project's grunt.js gruntfile with: npm install grunt-recess

Then add this line to your project's grunt.js gruntfile:



This grunt task is a multi task, which means you can specify multiple subtasks and grunt will iterate over them. The dist below is a subtask, you could e.g. create a dev subtask to handle stuff while developing.

Example usage


recess: {
    dist: {
        src: ['src/main.css']

Lint and compile

recess: {
    dist: {
        src: ['src/main.less'],
        dest: 'dist/main.css',
        options: {
            compile: true

dest is only needed when compile: true, it won't output any warnings in this mode. You can also specify .less files and they will be compiled.

Lint, compile and concat

recess: {
    dist: {
        src: [
        dest: 'dist/combined.css',
        options: {
            compile: true

You can specify more than one src to concat the files.


// Default
compile: false,
compress: false,
noIDs: true,
noJSPrefix: true,
noOverqualifying: true,
noUnderscores: true,
noUniversalSelectors: true,
prefixWhitespace: true,
strictPropertyOrder: true,
zeroUnits: true


Grunt currently doesn't have a way to test tasks directly. You can test this task by running grunt and check that it passes on the valid files and fails on the invalid.


In lieu of a formal styleguide, take care to maintain the existing coding style.


MIT License (c) Sindre Sorhus

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