This package is used in order to integrate with postcss and all of its plugins.

First, npm install within the project:

npm install @stencil/postcss --save-dev

Next, within the project's stencil.config.js file, import the plugin and add it to the plugins config. In the example below we're using the autoprefixer postcss plugin, so you'll also have to run:

npm install autoprefixer --save-dev

const postcss = require('@stencil/postcss');
const autoprefixer = require('autoprefixer');

exports.config = {
  plugins: [
    postcss({
      plugins: [autoprefixer()]
    })
  ]
};

During development, this plugin will use postcss to process any plugins you may have passed along.

Postcss has an ecosystem of plugins itself (a plugin for a plugin if you will). For our example, we're using the autoprefixer plugin, and configuring its options. Note, you can pass any valid autoprefixer option.

exports.config = {
  plugins: [
    postcss({
      plugins: [
        autoprefixer({
          browsers: ['last 6 versions'],
          cascade: false
        })
      ]
    })
  ]
};

• postcss
• autoprefixer
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