How to Migrate from Webpack to Vite?

Migrating from Webpack to Vite is a process that allows you to transition from a traditional bundler (Webpack) to a modern front-end build tool (Vite). Vite offers faster build times, better development server performance, and built-in support for modern JavaScript features like ES modules. In this article, we'll guide you through the steps required to migrate a Webpack-based project to Vite, ensuring compatibility while leveraging Vite's improved performance and development experience.

Approach

To migrate from Webpack to Vite, we start by removing Webpack dependencies and installing Vite along with any necessary plugins (depending on the framework used). We then modify the package.json scripts to replace Webpack with Vite commands. After that, we adjust the index.html file and update the asset imports to fit Vite's module system. Finally, we run the app in development mode and verify the migration using the build and preview commands.

Before we dive into the migration, let’s understand the steps:

• Installing Vite and removing Webpack: We’ll first install Vite and remove Webpack-related dependencies.
• Adapting the configuration: Since Webpack uses a webpack.config.js file and Vite uses vite.config.js, we need to update the configuration.
• Updating scripts: The package. json file will need updated build and serve scripts.
• Handling assets: Moving any static assets if necessary (Vite handles this differently).
• Testing: Verifying that everything works smoothly after the migration.

Steps to Create the Application

Step 1: Create a project using the below command

npm create vite@latest migrate-webpack

Step 2: Run the following command to install Vite and other necessary dependencies:

npm install vite @vitejs/plugin-react --save-dev

Step 3: Install any other packages using below command

npm install

Step 4: Remove Webpack and Install Dev Tools and remove unnecessary Webpack dependencies:

npm uninstall webpack webpack-cli webpack-dev-server

Updated Dependencies:

 "dependencies": {
    "react": "^18.3.1",
   "react-dom": "^18.3.1"
  }

Project Structure:

Example: After running npm run dev, Vite will start a local development server, and you should see your app with the "Hello, World!" text rendered.

//src/components/HelloWorld.jsx

import React from 'react';
const HelloWorld = () => {
    return <h1>Hello, World!</h1>;
};

export default HelloWorld;

// src/App.jsx
import React from 'react';
import HelloWorld from './components/HelloWorld';

function App() {
    return (
        <div className="App">
            <HelloWorld />
        </div>
    );
}

export default App;

Output :

Conclusion

Migrating from Webpack to Vite simplifies your development workflow, especially for projects using modern frameworks like React. Vite offers faster builds, quicker HMR (hot module replacement), and a more straightforward configuration. By following these steps, you’ve successfully migrated a Webpack project to Vite and learned how Vite’s simplified approach speeds up your development.