Handle WebPack CSS imports when testing with Mocha and Babel

Handle WebPack CSS imports when testing with Mocha and Babel

By : Anirban Figueredo
Date : November 25 2020, 09:00 AM
I wish this helpful for you I came across the same problem and just got it working, so in my mocha.opts file I added the following require calls:
code :
--require test/babelhook
--require test/css-null-compiler
// This file is required in mocha.opts
// The only purpose of this file is to ensure
// the babel transpiler is activated prior to any
// test code, and using the same babel options

// Prevent Mocha from compiling class
function noop() {
  return null;

require.extensions['.css'] = noop;
require.extensions['.scss'] = noop;

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Include paths for imports in babel using webpack

Include paths for imports in babel using webpack

By : bpla2112
Date : March 29 2020, 07:55 AM
wish help you to fix your issue Given a directory structure such as: , Webpack accepts multiple resource roots into config.
code :
module.exports = {
   resolve: {
      root: [__dirname + '/common', __dirname + '/src']
Handle WebPack CSS imports when testing with Mocha

Handle WebPack CSS imports when testing with Mocha

By : José Alonso Ch S
Date : March 29 2020, 07:55 AM
it should still fix some issue I had the same problem lately and the solution was through Mocha compilers.
create a file, let's call it 'css-null-compiler.js' and it has:
code :
function noop() {
  return null;

require.extensions['.styl'] = noop;
// you can add whatever you wanna handle
require.extensions['.scss'] = noop;
require.extensions['.png'] = noop;
// ..etc
mocha /your/test.spec.js --compilers css:css-null-compiler.js
Mocha test failing using babel and webpack

Mocha test failing using babel and webpack

By : Praveen Kumar M
Date : March 29 2020, 07:55 AM
around this issue You can use the --compilers option which allows you to customize the nodejs require system in order to let it understand png files. So :
code :
mocha --compilers png:./mochacfg.js
--compilers png:./mochacfg.js
require.extensions['.png'] = function(){ return null; }
var fs = require('fs');
require.extensions['.png'] = function(module, filepath) {
  var src = fs.readFileSync(filepath).toString ('base64');
  return module._compile('module.exports = "data:image/png;base64,' + src + '";');

How come, Webpack directly imports webpack.config.babel.js?

How come, Webpack directly imports webpack.config.babel.js?

By : zorbastefan
Date : March 29 2020, 07:55 AM
I think the issue was by ths following , Webpack uses interpret to load configuration file. It takes first file with basename webpack.config or webpackfile and any extension interpret knows. Additionally, it gives priority to .js files.
After having found the config, it registers corresponding compiler and requires the config. Particularly in case of .babel.js, it tries to require these three modules one after another until one of them is found. If it succeeds, babel basically hooks into requiring files.
ES6 Dynamic Imports using Webpack and Babel

ES6 Dynamic Imports using Webpack and Babel

By : tie xie
Date : March 29 2020, 07:55 AM
I wish this help you I managed to fix my own problem in the end, so I will share what I discovered in an answer.
The reason the chunk file wasn't loading was because Webpack was looking in the wrong directory for it. I noticed in the Network tab of my developer console that the the chunk file/module was being called from my root directory / and not in /js directory where it belongs.
code :
output: {
  path: path.resolve(__dirname, 'dist/js'),
  publicPath: "/js/", //<---------------- added this
  filename: 'app.bundle.js'
TypeError: e.init is not a function
import("Controllers/clients.js").then((clients) => {
import("Controllers/clients.js").then(({clients}) => {
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