[Webpack workflow]

package.json

{
	"name": "webpack-dev",
	"version": "1.0.0",
	"description": "Webpack development workflow with laravel-mix",
	"main": "index.js",
	"scripts": {
		"dev": "npm run development",
		"development": "cross-env NODE_ENV=development node_modules/webpack/bin/webpack.js --progress --hide-modules --config=node_modules/laravel-mix/setup/webpack.config.js",
		"watch": "cross-env NODE_ENV=development node_modules/webpack/bin/webpack.js --watch --progress --hide-modules --config=node_modules/laravel-mix/setup/webpack.config.js",
		"hot": "cross-env NODE_ENV=development webpack-dev-server --inline --hot --config=node_modules/laravel-mix/setup/webpack.config.js",
		"prod": "npm run production",
		"production": "cross-env NODE_ENV=production node_modules/webpack/bin/webpack.js --progress --hide-modules --config=node_modules/laravel-mix/setup/webpack.config.js"
	},
	"keywords": [],
	"author": "",
	"license": "ISC",
	"devDependencies": {
		"browser-sync": "^2.26.3",
		"browser-sync-webpack-plugin": "^2.0.1",
		"cross-env": "^5.2.0",
		"laravel-mix": "^4.0.12",
		"node-sass": "^4.11.0",
		"sass": "^1.15.2",
		"sass-loader": "^7.1.0",
		"vue-template-compiler": "^2.5.21"
	},
	"browserslist": {
		"production": [
			"> 1%",
			"last 3 versions",
			"ie 10"
		],
		"development": [
			"last 15 chrome version",
			"last 15 firefox version",
			"ie 10"
		]
	}
}

webpack.mix.js

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

// require('mix-html-builder');
require('laravel-mix-criticalcss');

let siteUrl = 'http://v3.lanbox.lt';
let siteFolder = '/laravelmix-test';
let siteRoot = '../html';
let siteAssetsFolder = siteRoot + siteFolder + '/assets';
let siteSrcFolder = siteRoot + siteFolder + '/_src';

let siteOptions = {
	jsSrc: siteSrcFolder + '/js',
	sassSrc: siteSrcFolder + '/sass',
	js: siteAssetsFolder + '/js',
	css: siteAssetsFolder + '/css',
}

/*
 |--------------------------------------------------------------------------
 | 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.extract(['jquery'])
	.autoload({
		jquery: ['$', 'window.jQuery', 'jQuery']
	})
	.js( siteOptions.jsSrc + '/main.js', siteOptions.js + '/' )
	.sass( siteOptions.sassSrc + '/style.scss', siteOptions.css + '/' )
	.setPublicPath( siteRoot + siteFolder )
	.options({
		processCssUrls: false,
		autoprefixer: {
			options: {
				browsers: [
					'last 6 versions',
				]
			}
		}
	})
	.criticalCss({
		enabled: mix.inProduction(),
		paths: {
			base: siteUrl + '/',
			templates: siteOptions.css
		},
		urls: [
			{ url: siteRoot + siteFolder + '/index.html', template: 'main' },
		],
		options: {
			minify: true,
		},
	})
	// .buildHtml({
	// 	htmlRoot: './_src/html-files/index.html', // Your html root file
	// 	output: './index.html', // The html output file
	// 	partialRoot: './_src/html-files/partials/'    // OPTIONAL: default partial path
	// })
	.browserSync({
		proxy: siteUrl + siteFolder,
		port: 8887,
		https: false,
		files: [
			// '!**/_src/html-files/**/*',
			siteOptions.js + '/**/*.js',
			siteOptions.css + '/**/*.css',
			siteRoot + siteFolder + '/**/*.php',
			siteRoot + siteFolder + '/**/*.html'
		],
		ghostMode: {
			clicks: true,
			forms: true,
			scroll: true,
			location: true
		},
		reloadOnRestart: true,
		notify: false,
		reloadDelay: 350
	})
	.disableNotifications()
	.version();

// Full API
// mix.js(src, output);
// mix.react(src, output); <-- Identical to mix.js(), but registers React Babel compilation.
// mix.preact(src, output); <-- Identical to mix.js(), but registers Preact compilation.
// mix.coffee(src, output); <-- Identical to mix.js(), but registers CoffeeScript compilation.
// mix.ts(src, output); <-- TypeScript support. Requires tsconfig.json to exist in the same folder as webpack.mix.js
// mix.extract(vendorLibs);
// mix.sass(src, output);
// mix.less(src, output);
// mix.stylus(src, output);
// mix.postCss(src, output, [require('postcss-some-plugin')()]);
// mix.browserSync('my-site.test');
// mix.combine(files, destination);
// mix.babel(files, destination); <-- Identical to mix.combine(), but also includes Babel compilation.
// mix.copy(from, to);
// mix.copyDirectory(fromDir, toDir);
// mix.minify(file);
// mix.sourceMaps(); // Enable sourcemaps
// mix.version(); // Enable versioning.
// mix.disableNotifications();
// mix.setPublicPath('path/to/public');
// mix.setResourceRoot('prefix/for/resource/locators');
// mix.autoload({}); <-- Will be passed to Webpack's ProvidePlugin.
// mix.webpackConfig({}); <-- Override webpack.config.js, without editing the file directly.
// mix.babelConfig({}); <-- Merge extra Babel configuration (plugins, etc.) with Mix's default.
// mix.then(function () {}) <-- Will be triggered each time Webpack finishes building.
// mix.extend(name, handler) <-- Extend Mix's API with your own components.
// mix.options({
//   extractVueStyles: false, // Extract .vue component styling to file, rather than inline.
//   globalVueStyles: file, // Variables file to be imported in every component.
//   processCssUrls: true, // Process/optimize relative stylesheet url()'s. Set to false, if you don't want them touched.
//   purifyCss: false, // Remove unused CSS selectors.
//   terser: {}, // Terser-specific options. https://github.com/webpack-contrib/terser-webpack-plugin#options
//   postCss: [] // Post-CSS options: https://github.com/postcss/postcss/blob/master/docs/plugins.md
// });