postcss.config.js
/**
* Exports the PostCSS configuration.
*
* @return {string} PostCSS options.
*/
module.exports = ( { file, options, env } ) => ( { /* eslint-disable-line */
plugins: {
'postcss-import': {},
'postcss-preset-env': {
stage: 0,
autoprefixer: {
grid: true
}
},
'postcss-mixins': {},
// Minify style on production using cssnano.
cssnano: 'production' === env ?
{
preset: [
'default', {
autoprefixer: false,
calc: {
precision: 8
},
convertValues: true,
discardComments: {
removeAll: true
},
mergeLonghand: false,
zindex: false,
},
],
} : false,
},
} );