TypeScript and transpilation

TypeScript integration

Webpack doesn't understand TypeScript natively. Use ts-loader or babel-loader with @babel/preset-typescript. ts-loader provides type checking during build. fork-ts-checker-webpack-plugin runs type checking in parallel for faster builds. Configure tsconfig.json module to 'esnext' and let Webpack handle module transformation.

Configure TypeScript

Set up ts-loader with parallel type checking.

const ForkTsCheckerPlugin = require('fork-ts-checker-webpack-plugin');

module.exports = {
  module: {
    rules: [
      {
        test: /\.tsx?$/,
        loader: 'ts-loader',
        options: { transpileOnly: true }
      }
    ]
  },
  plugins: [new ForkTsCheckerPlugin()]
};

Output:

TypeScript compiled with parallel type checking

transpileOnly for speed

Set transpileOnly: true to skip type checking in ts-loader, letting fork-ts-checker run it separately. This speeds up rebuilds significantly in development, while maintaining type safety.

Quick check

Quick check: What does fork-ts-checker-webpack-plugin do?

• Runs type checking in parallel for faster builds.
• Removes TypeScript from the bundle.
• Enables decorators in TypeScript.