How to bundle nestjs application with webpack

Bundling a NestJS application with Webpack involves configuring Webpack to handle the various dependencies, modules, and assets of your application. Here's a step-by-step guide on how you can bundle a NestJS application with Webpack:

Step 1: Install Dependencies Ensure you have the necessary packages installed:

npm install webpack webpack-cli --save-dev
        

Step 2: Create Webpack Configuration Create a webpack.config.js file in the root of your NestJS project. This file will contain the configuration for Webpack. Below is a basic example:

const path = require('path');

module.exports = {
  entry: './src/main.ts', // Adjust the entry file accordingly
  target: 'node',
  output: {
    path: path.resolve(__dirname, 'dist'),
    filename: 'bundle.js',
  },
  resolve: {
    extensions: ['.ts', '.js'],
  },
  module: {
    rules: [
      {
        test: /\.ts$/,
        use: 'ts-loader',
        exclude: /node_modules/,
      },
    ],
  },
};
        

Step 3: Update Package.json Scripts Update the scripts section in your package.json file to include a build script that uses Webpack. For example:

"scripts": {
  "build": "webpack --mode production",
  "start": "node dist/bundle.js"
}
        

Step 4: Configure TypeScript Ensure your TypeScript configuration (tsconfig.json) is set up to include the necessary settings. For example:

{
  "compilerOptions": {
    // other options...
    "outDir": "./dist",
    "rootDir": "./src",
  },
  // other configurations...
}
        

Step 5: Run the Build Execute the build script:

npm run build
        

Step 6: Start the Application After the build is successful, start your application:

 npm start
        

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