I use webpack to build bootstrap directly from .less and .scss files. This allows customizing bootstrap by overriding the source in .less/.scss and still get all the benefits of webpack.
Your code is missing an entry point for any .css/.less/.scss files. You need to include an entry point for the compiled css files. For this entry point, I declare an array with const and then include paths inside the array to the source files I want webpack to compile.
Currently, I'm using bootstrap 3 with a base custom template and also a 2nd custom theme. The base template uses bootstrap .less file styling and it has specific source overrides written in .less files.
The 2nd custom theme uses .sass file styling and has similar overrides to bootstrap's base written in .scss files. So, I need to try to optimize all this styling for production (currently coming in about 400kb but that's a little heavy because we choose to avoid CDN's due to targeting use in China).
Below is a reference webpack.config.js which works to build from .less/.scss/.css files, and also does a few other things like build typescript modules and uses Babel for converting es6/typescript to browser compatible javascript. The output ultimately ends up in my /static/dist folder.
const path = require('path');
const webpack = require('webpack');
// plugins
const ForkTsCheckerNotifierWebpackPlugin = require('fork-ts-checker-notifier-webpack-plugin');
const ForkTsCheckerWebpackPlugin = require('fork-ts-checker-webpack-plugin');
const ManifestPlugin = require('webpack-manifest-plugin');
const MomentLocalesPlugin = require('moment-locales-webpack-plugin');
const MiniCssExtractPlugin = require('mini-css-extract-plugin');
const TerserJSPlugin = require('terser-webpack-plugin');
const OptimizeCssAssetsPlugin = require('optimize-css-assets-webpack-plugin');
// take debug mode from the environment
const debug = (process.env.NODE_ENV !== 'production');
// Development asset host (webpack dev server)
const publicHost = debug ? 'http://localhost:9001' : '';
const rootAssetPath = path.join(__dirname, 'src');
const manifestOptions = {
publicPath: `${publicHost}/static/dist/`,
};
const babelLoader = {
loader: 'babel-loader',
options: {
cacheDirectory: true,
presets: [
'@babel/preset-env'
]
}
};
const app_css = [
// specific order generally matters
path.join(__dirname, 'src', 'bootstrap-template1', 'assets', 'css', 'fonts', 'Roboto', 'css', 'fonts.css'),
path.join(__dirname, 'node_modules', 'font-awesome', 'css', 'font-awesome.css'),
// This is bootstrap 3.3.7 base styling writtin in .less
path.join(__dirname, 'src', 'bootstrap-template1', 'assets', 'less', '_main_full', 'bootstrap.less'),
// bootstrap theme in .scss -> src\bp\folder\theme\src\scss\styles.scss
path.join(__dirname, 'src', 'bp', 'folder', 'theme', 'src', 'scss', 'styles.scss'),
// back to .less -> 'src/bootstrap-template1/assets/less/_main_full/core.less',
path.join(__dirname, 'src', 'bootstrap-template1', 'assets', 'less', '_main_full', 'core.less'),
// 'src/bootstrap-template1/assets/less/_main_full/components.less',
path.join(__dirname, 'src', 'bootstrap-template1', 'assets', 'less', '_main_full', 'components.less'),
//'src/bootstrap-template1/assets/less/_main_full/colors.less',
path.join(__dirname, 'src', 'bootstrap-template1', 'assets', 'less', '_main_full', 'colors.less'),
// <!-- syntax highlighting in .css --> src/bp/folder/static/css/pygments.css
path.join(__dirname, 'src', 'bp', 'folder', 'static', 'css', 'pygments.css'),
// <!-- lato/ptsans font we want to serve locally --> src/fonts/googlefonts.css'
path.join(__dirname, 'src', 'fonts', 'googlefonts.css'),
// a .css style -> 'src/bp/appbase/styles/md_table_generator.css'
path.join(__dirname, 'src', 'bp', 'appbase', 'styles', 'md_table_generator.css'),
// another .css style -> hopscotch 'src/libs/hopscotch/dist/css/hopscotch.min.css'
path.join(__dirname, 'src', 'libs', 'hopscotch', 'dist', 'css', 'hopscotch.min.css'),
//LAST final custom snippet styles to ensure they take priority 'src/css/style.css',
path.join(__dirname, 'src', 'css', 'style.css')
];
const vendor_js = [
//'core-js',
'whatwg-fetch',
];
const app_js = [
// a typescript file! :)
path.join(__dirname, 'src', 'typescript', 'libs', 'md-table', 'src', 'extension.ts'),
// base bootstrap 3.3.7 javascript
path.join(__dirname, 'node_modules', 'bootstrap', 'dist', 'js', 'bootstrap.js'),
path.join(__dirname, 'src', 'main', 'app.js'),
// src/bootstrap-template1/assets/js/plugins/forms/styling/uniform.min.js'
path.join(__dirname, 'node_modules', '@imanov', 'jquery.uniform', 'src', 'js', 'jquery.uniform.js'),
// src/bootstrap-template1/assets/js/plugins/ui/moment/moment.min.js'
];
function recursiveIssuer(m) {
if (m.issuer) {
return recursiveIssuer(m.issuer);
} else if (m.name) {
return m.name;
} else {
return false;
}
}
module.exports = {
context: process.cwd(), // to automatically find tsconfig.json
// context: __dirname,
entry: {
app_css,
vendor_js,
app_js,
},
output: {
path: path.resolve(__dirname, 'dist'),
publicPath: `${publicHost}/static/dist/`,
chunkFilename: '[id].[hash:7].js',
filename: '[name].[hash:7].js'
},
resolve: {
extensions: [".webpack.js", ".web.js",".tsx", ".ts", ".js", ".css"],
alias: {
jquery$: path.resolve(__dirname, 'node_modules', 'jquery', 'dist', 'jquery.js'),
}
},
target: "web",
devtool: 'source-map',
devServer: {
// this devserver proxies all requests to my python development server except
// webpack compiled files in the `/static/dist` folder
clientLogLevel: 'warning',
contentBase: path.join(__dirname, './src'),
publicPath: 'dist',
open: true,
historyApiFallback: true,
stats: 'errors-only',
headers: {'Access-Control-Allow-Origin': '*'},
watchContentBase: true,
port: 9001,
proxy: {
'!(/dist/**/**.*)': {
target: 'http://127.0.0.1:8000',
},
},
},
mode: process.env.NODE_ENV === 'production' ? 'production' : 'development',
optimization: {
minimizer: [new TerserJSPlugin({}), new OptimizeCssAssetsPlugin({})],
splitChunks: {
cacheGroups: {
appStyles: {
name: 'app',
// https://webpack.js.org/plugins/mini-css-extract-plugin/#extracting-css-based-on-entry
test: (m, c, entry = 'app') =>
m.constructor.name === 'CssModule' && recursiveIssuer(m) === entry,
chunks: 'all',
enforce: true,
},
},
},
},
plugins: [
new webpack.ProvidePlugin({
$: 'jquery',
jQuery: 'jquery',
'window.jQuery': 'jquery',
'window.$': 'jquery'
}),
// Strip all locales from moment.js except "zh-cn"
// ("en" is built into Moment and can’t be removed)
new MomentLocalesPlugin({
localesToKeep: ['zh-cn'],
}),
new ForkTsCheckerWebpackPlugin({
tslint: true, useTypescriptIncrementalApi: true
}),
new ForkTsCheckerNotifierWebpackPlugin({ title: 'TypeScript', excludeWarnings: false }),
new MiniCssExtractPlugin({
filename: '[name].[hash:7].css',
chunkFilename: '[id].[hash:7].css',
moduleFilename: ({ name }) => `${name.replace('/js/', '/css/')}.[hash:7].css`
}),
new OptimizeCssAssetsPlugin({
assetNameRegExp: /\.optimize\.css$/g,
cssProcessor: require('cssnano'),
cssProcessorPluginOptions: {
preset: ['default', { discardComments: { removeAll: true } }],
},
canPrint: true
}),
new ManifestPlugin({
...manifestOptions
}),
].concat(debug ? [] : [
// production webpack plugins go here
new webpack.DefinePlugin({
'process.env': {
NODE_ENV: JSON.stringify('production'),
}
}),
new ForkTsCheckerWebpackPlugin({
async: false,
useTypescriptIncrementalApi: true,
memoryLimit: 2048
}),
]),
module: {
rules: [
{
// jinja/nunjucks templates
test: /\.jinja2$/,
loader: 'jinja-loader',
query: {
root:'../templates'
}
},
{
test: /\.ts(x?)$/,
exclude: /node_modules/,
use: [
babelLoader,
{
loader: 'ts-loader',
options:
{ // disable type checker - we will use it in
// fork-ts-checker-webpack-plugin
transpileOnly: true
}
}
]
},
{
test: /\.js$/,
exclude: /node_modules/,
use: [
babelLoader
]
},
{
test: /\.(html|jinja2)$/,
loader: 'raw-loader'
},
{
test: /\.(sc|sa|c)ss$/,
use: [
{
loader: MiniCssExtractPlugin.loader,
options: {
hmr: debug,
// only use if hmr is not working correctly
// reloadAll: true,
},
},
{
loader: "css-loader",
},
{
loader: "sass-loader"
},
]
},
{
test: /\.less$/,
use: [
{
loader: MiniCssExtractPlugin.loader,
options: {
hmr: debug,
// only use if hmr is not working correctly
// reloadAll: true,
},
},
{
loader: 'css-loader', // translates CSS into CommonJS
},
{
loader: 'less-loader', // compiles Less to CSS
},
],
},
{
test: /\.(ttf|eot|svg|gif|ico)$/,
use: [
{
loader: 'file-loader',
options: {
name: '[path][name].[hash:7].[ext]',
context: rootAssetPath
},
},
],
},
{
test: /\.(jpe?g|png)$/i,
loader: 'responsive-loader',
options: {
name: '[path][name].[hash:7].[ext]',
adapter: require('responsive-loader/sharp'),
context: rootAssetPath
}
},
{
test: /\.woff(2)?(\?v=[0-9]\.[0-9]\.[0-9])?$/,
loader:'url-loader',
options:{
limit: 10000,
mimetype: 'application/font-woff',
// name: ('fonts/[path][name].[hash:7].[ext]'),
name: ('fonts/[name].[hash:7].[ext]'),
}
},
{
test: require.resolve("jquery"),
use:[
{ loader: "expose-loader", options:"$" },
{ loader: "expose-loader", options:"jQuery" },
{ loader: "expose-loader", options:"jquery" }
]
}
]
},
};
