webpack.mix.js

let mix = require('laravel-mix');

/*
 |--------------------------------------------------------------------------
 | Mix Asset Management
 |--------------------------------------------------------------------------
 |
 | Mix provides a clean, fluent API for defining some Webpack build steps
 | for your Laravel application. By default, we are compiling the Sass
 | file for your application, as well as bundling up your JS files.
 |
 */

 mix
    .setPublicPath("./")
    .js('src/js/app.js', 'js')
    .sass('src/sass/app.scss', 'css')
    .options({
      postCss: [
          require('autoprefixer'),
          require('cssnano'),
      ],
      processCssUrls: false
    })
   .browserSync({
      proxy: '127.0.0.1:8000',
      files: [
        '*.html',
        'css/*.css',
        'js/*.js',
      ],
      open: true,
      notify: false,
   });