koel/webpack.mix.js

const mix = require('laravel-mix');
const fs = require('fs');

mix.config.detectHotReloading()
if (mix.config.hmr) {
    // There's a bug with Mix/copy plugin which prevents HMR from working:
    // https://github.com/JeffreyWay/laravel-mix/issues/150
    console.log('In HMR mode. If assets are missing, Ctr+C and run `yarn dev` first.');

    // Somehow public/hot isn't being removed by Mix. We'll handle it ourselves.
    process.on('SIGINT', () => {
        try {
            fs.unlinkSync(mix.config.publicPath + '/hot');
        } catch (e) {}
        process.exit();
    });
} else {
    mix.copy('resources/assets/img', 'public/img', false)
        .copy('node_modules/font-awesome/fonts', 'public/fonts', false);
}

mix.js('resources/assets/js/app.js', 'public/js')
    .sass('resources/assets/sass/app.scss', 'public/css');

if (mix.config.inProduction) {
    mix.version();
    mix.disableNotifications();
}