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Webpack 5ViteAutomated Breaking Change Check

Migrate Webpack 5 Config to Vite (10x Faster HMR)

Convert webpack.config.js bundles into lightning-fast Vite configs (vite.config.ts). Eliminate multi-minute cold starts and reload delays.

From: Webpack 5
To: Vite
Source (Webpack 5)
480 chars
Migrated Target (Vite)
1ms413 chars
import { defineConfig } from 'vite';
import react from '@vitejs/plugin-react';
import path from 'path';

// Migrated from webpack.config.js (TypeScript React detected)
export default defineConfig({
  plugins: [react()],
  resolve: {
    alias: {
      '@': path.resolve(__dirname, './src'),
    },
  },
  server: {
    port: 3000,
    open: true,
  },
  build: {
    outDir: 'dist',
    sourcemap: true,
  },
});

Detected Breaking Changes & Semantic Shifts (2)

Native ESM Module Resolution
info

Vite leverages native browser ES modules during development instead of bundling whole dependency trees.

Resolution: Use `export default defineConfig({...})` from vite.
HTML is the Primary Entry Point
breaking

In Vite, index.html lives in the project root and references `<script type="module" src="/src/main.tsx">`.

Resolution: Move index.html to the project root and remove HtmlWebpackPlugin.

How to Migrate from Webpack 5 to Vite

  1. 1

    Paste your webpack.config.js configuration file.

  2. 2

    The migrator converts entry points and path aliases to Vite `resolve.alias` configuration.

  3. 3

    Loaders (ts-loader, babel-loader, style-loader) are removed as Vite handles TypeScript and CSS natively.

  4. 4

    Copy the output to `vite.config.ts` and adjust your root index.html script tag.

Build Vite Application in CI

.github/workflows/vite-build.yml
name: Build
on: [push]
jobs:
  build:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
      - uses: actions/setup-node@v4
        with:
          node-version: 20
      - run: npm ci
      - run: npx vite build

Run Migration via Terminal CLI

Perform identical migration routines across entire directories or repositories in your local terminal:

devflow migrate webpack-to-vite -i webpack.config.js -o vite.config.ts

Frequently Asked Questions

Does Vite work with React, Vue, and Svelte?
Yes, official first-party plugins (@vitejs/plugin-react, @vitejs/plugin-vue) provide full HMR support.
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