module.exports = { mode: 'development', // webpack will transpile TS and JS files resolve: { extensions: ['.ts', '.js'] }, module: { rules: [ { // every time webpack sees a TS file (except for node_modules) // webpack will use "ts-loader" to transpile it to JavaScript test: /\.ts$/, exclude: [/node_modules/], use: [ { loader: 'ts-loader', options: { // skip typechecking for speed transpileOnly: true, } } ] } ] } };