Simpe laravelmix config for auto prefixer

gistfile1.txt

let mix = require('laravel-mix');
require('laravel-mix-purgecss');
require('laravel-mix-polyfill');
const path  = require('path')


mix.options({
    processCssUrls: false, // enable this if need auto process css url
    postCss: [
      require('autoprefixer')({
      cascade: false,
      grid: true,
    })
  ]
})

mix.polyfill({
  enabled: true,
  useBuiltIns: 'usage',
  corejs: 3,
  targets: {
    'firefox': 50,
    'ie': 11,
  }
});

package.json

{
  "browserslist": [
    "> 1%",
    "last 40 versions"
  ],
  "devDependencies": {
    "laravel-mix-polyfill": "^2.0.0"
  }
}