MiniCssExtractPlugin is not creating css file - javascript

I'm implementing server side rendering with React/Node and CSS Modules are no longer working.
I've brought in mini-css-extract-plugin to extract the CSS from the JS and the plugin is not creating a css file in the public folder (or anywhere).
/package.json
{
....
"main": "webpack.config.js",
"scripts": {
"server": "babel-node ./src/server/index.js",
"client": "webpack --watch --progress",
"start": "yarn server & yarn client"
},
...
"devDependencies": {
"#babel/cli": "^7.4.4",
"#babel/core": "^7.4.0",
"#babel/node": "^7.4.5",
"#babel/plugin-proposal-class-properties": "^7.4.0",
"#babel/plugin-syntax-dynamic-import": "^7.2.0",
"#babel/preset-env": "^7.4.2",
"#babel/preset-react": "^7.0.0",
"#babel/register": "^7.4.4",
"babel-loader": "^8.0.5",
"babel-plugin-css-modules-transform": "^1.6.2",
"css-loader": "^2.1.1",
"mini-css-extract-plugin": "^0.6.0",
"react-frontload": "^1.0.7",
"react-loadable": "^5.5.0",
"webpack": "^4.29.6",
"webpack-cli": "^3.3.0",
"webpack-node-externals": "^1.7.2"
}
}
/webpack.config.js
const path = require('path');
const MiniCssExtractPlugin = require('mini-css-extract-plugin');
module.exports = {
mode: 'production',
entry: './src/client/index.js',
target: 'node',
output: {
path: path.resolve(__dirname, 'public'),
filename: 'build.js',
publicPath: '/',
},
resolve: {extensions: ['.js', '.css']},
watch: false,
plugins: [new MiniCssExtractPlugin({filename: 'styles.css'})],
module: {
rules: [
{
test: /\.css$/,
sideEffects: true,
use: [{loader: MiniCssExtractPlugin.loader}, 'css-loader'],
},
{
test: /\.js?$/,
loader: 'babel-loader',
exclude: /node_modules/,
options: {
cacheDirectory: true
}
}
]
}
}
/.babelrc
{
"presets": ["#babel/env", "#babel/react"],
"plugins": [
"#babel/plugin-syntax-dynamic-import",
"#babel/plugin-proposal-class-properties",
["css-modules-transform", {
"generateScopedName": "[name]__[local]___[hash:base64:5]"
}]
]
}
I expect to see the following file be created /public/styles.css and right now no file is being created in that folder or anywhere else. Thanks for your help!


Check my below config
const MiniCssExtractPlugin = require("mini-css-extract-plugin");
module.exports = {
plugins: [
new MiniCssExtractPlugin({
filename: "[name].css",
chunkFilename: "[id].css"
}),
],
module: {
rules: [{
test: /\.scss$/,
use: [
'style-loader',
MiniCssExtractPlugin.loader,
{
loader: "css-loader",
options: {
minimize: true,
sourceMap: true
}
},
{
loader: "sass-loader"
}
]
}
]
}
Please let me know if you still have problem

Related

Babel Errors in Webpack Configs after Updating Webpack

I am trying to update Webpack to a newer versions (by removing node_modules then running yarn), but I am not able to solve all the config errors shown below.
So far in the Webpack config, I have changed query to options, and loaders to rules. In package.json, I have replaced --colors with --color.
Original webpack.config.js [Source]:
const path = require('path')
const webpack = require('webpack')
const CopyWebpackPlugin = require('copy-webpack-plugin')
module.exports = {
entry: {
background: path.join(__dirname, './src/background'),
entry: path.join(__dirname, './src/entry'),
},
output: {
path: path.join(__dirname, './dist'),
filename: '[name].js',
},
plugins: [
new CopyWebpackPlugin([
{ from: 'src/manifest.json' },
{ from: 'images/**/*' }
]),
new webpack.DefinePlugin({
'process.env': {
NODE_ENV: JSON.stringify('production')
}
})
],
resolve: {
extensions: ['.js']
},
module: {
loaders: [{
test: /\.js$/,
loader: 'babel-loader',
query: {
presets: ['react', 'es2015', 'stage-0']
},
exclude: /node_modules/
}]
}
}
Current webpack.config.js:
const path = require("path");
const webpack = require("webpack");
const CopyWebpackPlugin = require("copy-webpack-plugin");
module.exports = {
entry: {
background: path.join(__dirname, "./src/background"),
entry: path.join(__dirname, "./src/entry"),
},
output: {
path: path.join(__dirname, "./dist"),
filename: "[name].js",
},
plugins: [
new CopyWebpackPlugin([
{ from: "src/manifest.json" },
{ from: "images/**/*" },
]),
new webpack.DefinePlugin({
"process.env": {
NODE_ENV: JSON.stringify("production"),
},
}),
],
resolve: {
extensions: [".js"],
},
module: {
rules: [
{
test: /\.js$/,
loader: "babel-loader",
options: {
presets: ["react", "es2015", "stage-0"],
},
exclude: /node_modules/,
},
],
},
};
Still many of the following errors...
ERROR in ./src/background.js
Module build failed (from ./node_modules/babel-loader/lib/index.js):
TypeError: Cannot read property 'babel' of undefined
at Object.module.exports (/home/gameveloster/sidebar/node_modules/babel-loader/lib/index.js:103:36)
but there's no babel in the files stated in the errors, like ./src/background.js.
What is the correct way to fix this issue? Thanks!
package.json:
{
"name": "sidebar",
"private": true,
"version": "0.1.0",
"main": "dist/entry.js",
"license": "UNLICENSED",
"scripts": {
"build": "webpack --progress --profile --color",
"watch": "webpack --watch --progress --color",
"dev": "npm run watch"
},
"dependencies": {
"chrome-sidebar": "file:../chrome-sidebar",
"react": "^15.5.4",
"react-dom": "^15.5.4"
},
"devDependencies": {
"babel-core": "6.24.0",
"babel-eslint": "^7.2.3",
"babel-generator": "6.24.0",
"babel-loader": "6.4.1",
"babel-plugin-module-resolver": "2.6.2",
"babel-plugin-react-require": "3.0.0",
"babel-plugin-transform-class-properties": "6.22.0",
"babel-plugin-transform-es2015-modules-commonjs": "6.24.0",
"babel-plugin-transform-object-rest-spread": "6.22.0",
"babel-plugin-transform-react-jsx-source": "6.22.0",
"babel-plugin-transform-react-remove-prop-types": "0.3.3",
"babel-plugin-transform-runtime": "6.22.0",
"babel-preset-env": "^1.4.0",
"babel-preset-latest": "6.24.0",
"babel-preset-node6-es6": "^11.2.5",
"babel-preset-react": "6.23.0",
"babel-preset-stage-0": "^6.24.1",
"babel-runtime": "6.23.0",
"copy-webpack-plugin": "^4.0.1",
"webpack": "^5.72.0",
"webpack-cli": "^4.9.2"
}
}

the error gives the npm name of a package that does not exist

An error appeared - Cannot find the module, but the problem is that such a module does not exist. The correct module name is babel-plugin-proposal-class-properties (and the error - 'babel-plugin-transform-class-propties'). Please tell me what could be the problem.
I type "npm run start:dev" into the terminal and I get the error output.
webpack.config.js:
const path = require('path')
const { CleanWebpackPlugin } = require('clean-webpack-plugin')
var HtmlWebpackPlugin = require('html-webpack-plugin')
const CopyPlugin = require('copy-webpack-plugin')
const TerserJSPlugin = require('terser-webpack-plugin') // min js
const MiniCssExtractPlugin = require('mini-css-extract-plugin')
const OptimizeCSSAssetsPlugin = require('optimize-css-assets-webpack-plugin') // min css
const autoprefixer = require('autoprefixer-stylus')
const devMode = process.env.NODE_ENV !== 'production'
// dev - devMode = true
// prod - devMode = false
const jsLoaders = () => {
const loaders = [
{
loader: 'babel-loader',
options: {
presets: ['#babel/preset-env'],
},
},
]
if (devMode) {
loaders.push('eslint-loader')
}
return loaders
}
module.exports = {
context: path.resolve(__dirname, 'frontend/src'),
// entry: ['#babel/polyfill', './index.js'],
entry: './index.js',
mode: 'development', // uncompress
output: {
// filename: 'bundle.[hash].js', // 'build.js',
// path: path.resolve(__dirname, 'dist'),
path: path.resolve(__dirname, 'frontend/static/frontend'),
filename: 'main.js'
},
optimization: {
minimizer: [new TerserJSPlugin({}), new OptimizeCSSAssetsPlugin({})],
},
resolve: {
// элиасы
extensions: ['.js'],
alias: {
'#': path.resolve(__dirname, 'frontend/src'),
fonts: path.join(__dirname, 'frontend/src/assets/fonts'),
},
},
devtool: devMode ? 'source-map' : false,
devServer: {
port: 5000,
hot: devMode,
},
plugins: [
new CleanWebpackPlugin(),
new HtmlWebpackPlugin({
template: path.resolve(__dirname, 'frontend/templates/frontend/index.html'),
}),
new CopyPlugin({
patterns: [
{
// imgs
from: path.resolve(__dirname, 'frontend/src/assets/img'),
to: 'assets/img',
},
{
// fonts
from: path.resolve(__dirname, 'frontend/src/assets/fonts'),
to: 'assets/fonts',
},
],
}),
new MiniCssExtractPlugin({
// Options similar to the same options in webpackOptions.output
// both options are optional
filename: devMode ? 'style.css' : 'style.[hash].css',
chunkFilename: devMode ? '[id].css' : '[id].[hash].css',
}),
],
module: {
rules: [
{
test: /\.js$/,
exclude: /node_modules/,
use: jsLoaders(),
},
{
test: /\.(sa|sc|c)ss$/,
use: [
{
loader: MiniCssExtractPlugin.loader,
options: {
hmr: process.env.NODE_ENV === 'development',
reloadAll: true,
},
},
'css-loader?url=false',
'sass-loader',
],
},
{
test: /\.styl$/,
use: [
{
loader: 'style-loader', // creates style nodes from JS strings
},
{
loader: MiniCssExtractPlugin.loader,
options: { publicPath: 'frontend/dist' },
},
{ loader: 'css-loader' },
// {loader: 'stylus-loader'},
{
loader: 'stylus-loader', // compiles Stylus to CSS
options: {
use: [autoprefixer()],
},
},
],
},
{
test: /\.pug$/,
loader: 'pug-loader',
options: {
pretty: true,
},
},
{
test: /\.(png|svg|jpg|gif|eot|ttf|woff|woff2)$/,
loader: 'url-loader',
options: {
publicPath: './',
limit: 10000,
},
},
],
},
}
package.json
{
"name": "app",
"version": "1.0.0",
"description": "",
"main": "webpack.config.js",
"scripts": {
"start": "cross-env NODE_ENV=development webpack-dev-server --open",
"start:dev": "cross-env NODE_ENV=development webpack serve",
"build": "cross-env NODE_ENV=production webpack --mode=production",
"test": "jest"
},
"keywords": [],
"author": "",
"license": "ISC",
"devDependencies": {
"#babel/core": "^7.12.10",
"#babel/preset-env": "^7.12.11",
"#babel/preset-react": "^7.12.10",
"autoprefixer-stylus": "^1.0.0",
"babel-eslint": "^10.1.0",
"babel-plugin-transform-class-properties": "^6.24.1",
"clean-webpack-plugin": "^3.0.0",
"copy-webpack-plugin": "^7.0.0",
"cross-env": "^7.0.3",
"css-loader": "^5.0.1",
"eslint": "^7.18.0",
"eslint-config-google": "^0.14.0",
"eslint-loader": "^4.0.2",
"file-loader": "^6.2.0",
"html-webpack-plugin": "^5.0.0-beta.6",
"jest": "^26.6.3",
"mini-css-extract-plugin": "^1.3.4",
"node-sass": "4.14.1",
"optimize-css-assets-webpack-plugin": "^5.0.4",
"postcss-loader": "^4.1.0",
"pug": "^3.0.0",
"pug-loader": "^2.4.0",
"sass-loader": "^10.1.1",
"style-loader": "^2.0.0",
"stylus": "^0.54.8",
"stylus-loader": "^4.3.3",
"terser-webpack-plugin": "^5.1.1",
"url-loader": "^4.1.1",
"webpack": "^5.17.0",
"webpack-cli": "^4.4.0",
"webpack-dev-server": "^3.11.2"
},
"dependencies": {
"#babel/polyfill": "^7.12.1",
"#leanup/cli": "^1.0.90",
"#leanup/cli-preact": "^1.0.90",
"babel-loader": "8.2.1",
"browserslist": "^4.16.1",
"prop-types": "^15.7.2",
"react": "^17.0.1",
"react-dom": "^17.0.1"
}
}
index.js - https://codepen.io/dev-sera/pen/mdObpwv

The error shows that you've misspelled "properties" as "propties", missing the "er" after the second "p" somewhere in index.js

Integrate React 17 with webpack 5 and babel-plugin-react-css-modules (css modules with stylename)

I am trying to setup a react app with latest versions.
React 17, Webpack 5 and other modules.
I need css modules with styleName concept by using babel-plugin-react-css-modules
Trying to run the code shows the output but no styles are applied.
package.json
{
"name": "react-app",
"version": "1.0.0",
"description": "React Template App",
"author": "",
"license": "ISC",
"main": "index.js",
"scripts": {
"start": "webpack serve --mode development",
"build": "webpack --mode production",
"format": "prettier --write \"src/**/*.js\"",
"eslint-fix": "eslint --fix \"src/**/*.js\""
},
"dependencies": {
"babel-plugin-react-css-modules": "^5.2.6",
"react": "^17.0.1",
"react-dom": "^17.0.1"
},
"devDependencies": {
"#babel/core": "^7.12.10",
"#babel/preset-env": "^7.12.11",
"#babel/preset-react": "^7.12.10",
"babel-eslint": "^10.1.0",
"babel-loader": "^8.2.2",
"css-loader": "^5.0.1",
"eslint": "^7.16.0",
"eslint-config-react": "^1.1.7",
"eslint-loader": "^4.0.2",
"eslint-plugin-react": "^7.21.5",
"file-loader": "^6.2.0",
"html-webpack-plugin": "^4.5.0",
"less": "^4.0.0",
"less-loader": "^7.2.0",
"mini-css-extract-plugin": "^1.3.3",
"prettier": "2.2.1",
"style-loader": "^2.0.0",
"webpack": "^5.11.0",
"webpack-cli": "^4.2.0",
"webpack-dev-server": "^3.11.0"
}
}
webpack.config.js
const path = require('path');
const HtmlWebpackPlugin = require('html-webpack-plugin');
const MiniCssExtractPlugin = require('mini-css-extract-plugin');
module.exports = {
entry: './src/index.js',
output: {
path: __dirname + '/dist',
publicPath: '/',
filename: 'bundle.js'
},
devServer: {
contentBase: path.join(__dirname, "dist"),
open: true,
host: "localhost",
compress: true,
port: process.env.CLIENT_PORT,
hot: true,
quiet: false
},
module: {
rules: [{
test: /\.(js|jsx)$/,
exclude: /node_modules/,
use: ['babel-loader', 'eslint-loader']
},
{
test: /\.css$/,
use: [
'style-loader',
MiniCssExtractPlugin.loader,
// "less-loader",
{
loader: 'css-loader',
options: {
modules: true,
}
}
],
},
{
test: /\.(png|svg|jpg|gif)$/,
use: ["file-loader"]
}
]
},
plugins: [
new HtmlWebpackPlugin({
template: "./public/index.html",
filename: "./index.html",
favicon: "./public/favicon.ico"
}),
new MiniCssExtractPlugin({
filename: "[name].css",
chunkFilename: "[id].css"
})
],
devtool: 'inline-source-map',
};
.babelrc
{
"presets": [
"#babel/preset-env",
"#babel/preset-react"
],
"plugins": [
[
"babel-plugin-react-css-modules",
{
"webpackHotModuleReloading": true,
"autoResolveMultipleImports": true
}
]
]
}
home.js
import React from "react";
import "./style.css";
const Home = () => {
return (
<div styleName="container">
<div styleName="title">Hello from Home CSS</div>
</div>
);
};
export default Home;
style.css
.container {
display: flex;
flex-direction: column;
}
.title {
font-size: 24px;
color: red;
}

That's interesting issue which requires us to do a few more things to make it work as following:
babel-plugin-react-css-modules isn't working properly with css-loader in case of generating the name. But luckily we have a work around by using a temporary fix of someone #dr.pogodin/babel-plugin-react-css-modules. So just install needed packages:
npm i -D #dr.pogodin/babel-plugin-react-css-modules postcss // postcss is required aslo
Reconfigure babel configuration by changing the name in .babelrc:
{
// ...
"plugins": [
[
"#dr.pogodin/babel-plugin-react-css-modules",
{
"webpackHotModuleReloading": true,
"autoResolveMultipleImports": true
}
]
]
}
Finally, we would change the class name to make it consistent between babel-plugin-react-css-modules and css-loader in webpack.config.js:
{
test: /\.css$/,
use: [
// ...
{
loader: 'css-loader',
options: {
modules: {
localIdentName: '[path]___[name]__[local]___[hash:base64:5]', // This pattern matches with the default in `babel-plugin-react-css-modules`
},
}
}
],
}

TypeError: Attempting to change enumerable attribute of unconfigurable property (Vue.js SPA)(Webpack 4)(iPhone 6S)(iOS Safari)

(2018-July-29)
1. Background (Tech Stack)
Vue.js 2 (I am building a Single Page Application(SPA) with Vuex, vue-router)
Webpack 4
2. Problem
Visit my website in iOS Safari,
got white screen (because JS error, so nothing render)
3. Screenshot
Zoom in the error mesage
3. Error message
TypeError: Attempting to change enumerable attribute of unconfigurable property.
4. How to reproduce?
Visit https://browserstack.com
Choose iPhone 6S Safari
Visit https://wittcism.com
3. My Config
/webpack.config.js
var path = require('path')
var webpack = require('webpack')
const CleanWebpackPlugin = require('clean-webpack-plugin');
const HtmlWebpackPlugin = require('html-webpack-plugin');
const CopyWebpackPlugin = require('copy-webpack-plugin'); // https://github.com/webpack-contrib/copy-webpack-plugin
module.exports = {
entry: './src/main.js',
output: {
path: path.resolve(__dirname, './dist'),
publicPath: '/dist/',
filename: 'build.js',
},
module: {
rules: [{
test: /\.md$/,
use: 'raw-loader'
},
{
test: /\.css$/,
use: [
'vue-style-loader',
'css-loader'
],
},
{
test: /\.scss$/,
use: [
'vue-style-loader',
'css-loader',
'sass-loader'
],
},
{
test: /\.sass$/,
use: [
'vue-style-loader',
'css-loader',
'sass-loader?indentedSyntax'
],
},
{
test: /\.vue$/,
loader: 'vue-loader',
options: {
loaders: {
// Since sass-loader (weirdly) has SCSS as its default parse mode, we map
// the "scss" and "sass" values for the lang attribute to the right configs here.
// other preprocessors should work out of the box, no loader config like this necessary.
'scss': [
'vue-style-loader',
'css-loader',
'sass-loader'
],
'sass': [
'vue-style-loader',
'css-loader',
'sass-loader?indentedSyntax'
]
}
}
},
{
test: /\.js$/,
loader: 'babel-loader',
exclude: /node_modules/
},
{
test: /\.(png|jpg|gif|svg)$/,
loader: 'file-loader',
options: {
name: '[name].[ext]?[hash]'
}
},
{
test: /\.html$/,
use: [
{
loader: "html-loader",
options: { minify: true }
}
]
}
]
},
resolve: {
alias: {
'vue$': 'vue/dist/vue.esm.js',
'#': path.resolve(__dirname, './src/'),
},
extensions: ['*', '.js', '.vue', '.json']
},
devServer: {
historyApiFallback: true,
noInfo: true,
overlay: true
},
performance: {
hints: false
},
devtool: '#eval-source-map'
}
if (process.env.NODE_ENV === 'production') {
module.exports.devtool = '#source-map'
// http://vue-loader.vuejs.org/en/workflow/production.html
module.exports.output = {
path: path.resolve(__dirname, './dist'),
publicPath: '/dist/',
filename: '[name].[hash].js',
},
module.exports.plugins = (module.exports.plugins || []).concat([
new webpack.DefinePlugin({
'process.env': {
NODE_ENV: '"production"'
}
}),
new webpack.LoaderOptionsPlugin({
minimize: true
}),
new CleanWebpackPlugin(['dist']),
new HtmlWebpackPlugin({
title: 'Wittcism',
filename: './index.html',
template: './template/index.html',
minify: true,
}),
])
}
.babelrc
{
"presets": [
["env", { "modules": false }],
"stage-3"
]
}
package.json
{
"name": "hide",
"description": "hide",
"version": "1.1.0",
"scripts": {
"dev": "cross-env NODE_ENV=development webpack-dev-server --open --hot --port 8081 --host 0.0.0.0",
"build": "cross-env NODE_ENV=production webpack --mode production --progress --hide-modules"
},
"dependencies": {
"axios": "^0.18.0",
"babel-polyfill": "^6.26.0",
"bootstrap": "^4.1.1",
"bootstrap-vue": "^2.0.0-rc.11",
"es6-promise": "^4.2.4",
"jstransformer-verbatim": "^1.1.1",
"jwt-decode": "^2.2.0",
"moment": "^2.22.2",
"qiniu-js": "^2.4.0",
"tippy.js": "^2.5.4",
"tui-editor": "^1.2.3",
"v-tooltip": "^2.0.0-rc.33",
"vue": "^2.5.11",
"vue-carousel": "^0.10.0",
"vue-i18n": "^8.0.0",
"vue-markdown": "^2.2.4",
"vue-router": "^3.0.1",
"vuelidate": "^0.7.4",
"vuex": "^3.0.1"
},
"browserslist": [
"> 1%",
"last 2 versions",
"ie 6-8"
],
"devDependencies": {
"babel-core": "^6.26.3",
"babel-loader": "^7.1.5",
"babel-preset-env": "^1.7.0",
"babel-preset-stage-3": "^6.24.1",
"clean-webpack-plugin": "^0.1.19",
"copy-webpack-plugin": "^4.5.2",
"cross-env": "^5.0.5",
"css-loader": "^0.28.7",
"file-loader": "^1.1.4",
"html-loader": "^0.5.5",
"html-webpack-plugin": "^3.2.0",
"node-sass": "^4.9.0",
"pug": "^2.0.3",
"pug-loader": "^2.4.0",
"raw-loader": "^0.5.1",
"sass-loader": "^6.0.7",
"style-loader": "^0.21.0",
"vue-loader": "^14.2.2",
"vue-template-compiler": "^2.4.4",
"webpack": "^4.16.3",
"webpack-bundle-analyzer": "^2.13.1",
"webpack-cli": "^3.1.0",
"webpack-dev-server": "^2.9.1"
}
}
Question: How to fix: TypeError: Attempting to change enumerable attribute of unconfigurable property?
My Guess: iOS Safari doesn't support ES6 fully

After build in webpack ReactJS does't work

After webpack command webpack catch all files and finish build in dist folder, but react component doesn't work. I don't understand why. My configs attached:
package.json
{
"name": "name",
"version": "1.0.0",
"description": "Example",
"main": "index.js",
"scripts": {
"watch": "webpack --progress --watch",
"start": "webpack-dev-server --open",
"build": "webpack"
},
"devDependencies": {
"autoprefixer": "^7.1.3",
"babel-core": "^6.26.0",
"babel-loader": "^7.1.2",
"babel-preset-es2015": "^6.24.1",
"babel-preset-react": "^6.24.1",
"clean-webpack-plugin": "^0.1.16",
"css-loader": "^0.28.7",
"extract-text-webpack-plugin": "^3.0.0",
"file-loader": "^0.11.2",
"html-webpack-plugin": "^2.30.1",
"node-sass": "^4.5.3",
"optimize-css-assets-webpack-plugin": "^3.1.1",
"postcss-loader": "^2.0.6",
"react": "^15.6.1",
"react-dom": "^15.6.1",
"sass-loader": "^6.0.6",
"style-loader": "^0.18.2",
"webpack": "^3.5.5",
"webpack-dev-server": "^2.7.1"
},
"browserslist": [
"last 15 versions",
"> 1%",
"ie 8",
"ie 7"
]
}
webpack.config.js
const path = require('path');
const HtmlWebpackPlugin = require('html-webpack-plugin');
const ExtractTextPlugin = require("extract-text-webpack-plugin");
const OptimizeCssAssetsPlugin = require("optimize-css-assets-webpack-plugin");
const CleanWebpackPlugin = require('clean-webpack-plugin');
module.exports = {
entry: ['./app/app.js', './app/sass/app.sass'
],
output: {
filename: 'app.js',
path: path.resolve(__dirname, 'dist')
},
devServer: {
contentBase: './dist'
},
module: {
rules: [
{
test: /\.(js|jsx)$/,
exclude: /(node_modules)/,
use: {
loader: 'babel-loader'
}
},
{
test: /\.css$/,
use: ExtractTextPlugin.extract({
fallback: "style-loader",
use: ["css-loader", "postcss-loader"]
}),
},
{
test: /\.(sass|scss)$/,
use: ExtractTextPlugin.extract(['css-loader', 'postcss-loader', 'sass-loader'])
},
{
test: /\.(png|svg|jpg|gif)$/,
use: {
loader: 'file-loader',
options: {
name: 'img/[name].[ext]', // check the path
}
},
},
{
test: /\.(woff|woff2|eot|ttf|otf)$/,
use: {
loader: 'file-loader',
options: {
name: 'fonts/[name].[ext]', // check the path
}
}
}
]
},
plugins: [
new CleanWebpackPlugin(['dist']),
new HtmlWebpackPlugin({
title: 'Build version'
}),
new ExtractTextPlugin({
filename: 'css/app.min.css',
allChunks: true,
}),
new OptimizeCssAssetsPlugin()
]};
babel.rc
{"presets":["es2015", "react"]}
app file system:
app/
components/
fonts/
img/
sass/
app.js
index.html
index.html has a <div> with id="app" and script with src="app.js" in the body.

Move react and react-dom to dependencies instead of devDependecies in your package.json then try to build again.
Check this answer for an explanation:
Bower and devDependencies vs dependencies

Your react and react-dom packages are dependencies try moving them there.
Try modifying your webpack config file to some like this:
module.exports = {
entry: [
'./app/app.js',
],
output: {
path: path.resolve(__dirname, 'dist'),
filename: 'app.js',
publicPath: '/dist',
sourceMapFilename: 'bundle.map',
},
devtool: process.env.NODE_ENV === 'production' ? undefined : 'cheap-module-eval-source-map',
resolve: {
modules: ['node_modules', './app/components'],
extensions: ['.js', '.jsx'],
},
module: {
loaders: [
{
test: /(\.js$|\.jsx$)/,
exclude: /(node_modules|bower_components)/,
use: [
{
loader: 'babel-loader',
options: {
presets: ['react', 'es2015'],
},
},
],
},
{
test: /\.scss$/,
use: ['style-loader', 'css-loader', 'sass-loader'],
},
],
},
plugins: [
new webpack.optimize.UglifyJsPlugin({
sourceMap: true,
minimize: true,
compressor: {
warnings: false,
},
})
],
};
Add other necessary rules you need to the rules array.
With this config though, you don't need the .babelrc file as everything is all in place.

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