Package Exports

precss

This package does not declare an exports field, so the exports above have been automatically detected and optimized by JSPM instead. If any package subpath is missing, it is recommended to post an issue to the original package (precss) to support the "exports" field. If that is not possible, create a JSPM override to customize the exports field for this package.

Readme

PreCSS

PreCSS lets you use Sass-like markup and staged CSS features in CSS.

$blue: #056ef0;
$column: 200px;

.menu {
  width: calc(4 * $column);
}

.menu_link {
  background: $blue;
  width: $column;
}

/* becomes */

.menu {
  width: calc(4 * 200px);
}

.menu_link {
  background: #056ef0;
  width: 200px;
}

PreCSS combines Sass-like syntactical sugar — like variables, conditionals, and iterators — with emerging CSS features — like logical and custom properties, media query ranges, and image sets.

Usage

Add PreCSS to your build tool:

npm install precss --save-dev

Node

Use PreCSS to process your CSS:

import precss from 'precss';

precss.process(YOUR_CSS);

PostCSS

Add PostCSS to your build tool:

npm install postcss --save-dev

Use PreCSS as a plugin:

import postcss from 'postcss';
import precss from 'precss';

postcss([
  precss(/* options */)
]).process(YOUR_CSS);

Gulp

Add Gulp PostCSS to your build tool:

npm install gulp-postcss --save-dev

Use PreCSS in your Gulpfile:

import postcss from 'gulp-postcss';
import precss from 'precss';

gulp.task('css', function () {
  return gulp.src('./src/*.css').pipe(
    postcss([
      precss(/* options */)
    ])
  ).pipe(
    gulp.dest('.')
  );
});

Grunt

Add Grunt PostCSS to your build tool:

npm install grunt-postcss --save-dev

Use PreCSS in your Gruntfile:

import precss from 'precss';

grunt.loadNpmTasks('grunt-postcss');

grunt.initConfig({
  postcss: {
    options: {
      use: [
        precss(/* options */)
      ]
    },
    dist: {
      src: '*.css'
    }
  }
});

precss