After i installed Radix (drupal.org/project/radix) and created a new subtheme, there was an issue with webpack and the node_modules compiled libraries. It seems like the popper.js.map file was missing despite the fact that it was in the node_modules folder and the package.json file. So after a lot of debugging and searching i came to this https://stackoverflow.com/questions/47549298/webpack-installing-bootstr… post and KFoobar 's proposal worked for me. So, I stopped the browsersync process and edited the webpack.mix.js file like this .sourceMaps(); To make the warning go away, simply add .sourceMaps() to your js-file(s) in webpack.mix.js. rerun npm run watch or npm run build etc and problem solved! The complete webpack.mix.js file looks like this now
/*
|--------------------------------------------------------------------------
| Mix Asset Management
|--------------------------------------------------------------------------
|
| Mix provides a clean, fluent API for defining some Webpack build steps
| for your application. See https://github.com/JeffreyWay/laravel-mix.
|
*/
const proxy = 'https://demo.ddev.site';
const mix = require('laravel-mix');
/*
|--------------------------------------------------------------------------
| Configuration
|--------------------------------------------------------------------------
*/
mix
.webpackConfig({
// Use the jQuery shipped with Drupal to avoid conflicts.
externals: {
jquery: 'jQuery'
}
})
.setPublicPath('assets')
.disableNotifications()
.options({
processCssUrls: false
});
/*
|--------------------------------------------------------------------------
| Browsersync
|--------------------------------------------------------------------------
*/
mix.browserSync({
proxy: proxy,
files: ['assets/js/**/*.js', 'assets/css/**/*.css'],
stream: true,
});
/*
|--------------------------------------------------------------------------
| SASS
|--------------------------------------------------------------------------
*/
mix.sass('src/sass/demo.style.scss', 'css');
/*
|--------------------------------------------------------------------------
| JS
|--------------------------------------------------------------------------
*/
mix.js('src/js/demo.script.js', 'js').sourceMaps();
Notice the extra .sourceMaps(); at the end of the mix.js declaration.
