vite 3 bundle size is 6 times bigger than vite 2

[pwang2]

With a very simple config, vite 3 bundle size is 6 times bigger than vite 2. Any other config to make the bundle size smaller?

  build: {
    sourcemap: true,
    minify: false,
    outDir: "lib",
    lib: {
      entry: "src/index",
      formats: ["es"],
      filename: "abc"
    }
  }

[chenxch]

It is best to provide a simple demo.

[pwang2]

Here you go. https://github.com/pwang2/test-bundle

A further look reveals it is because unplugin-icons behaves differently in vite2 and vite3.

I will move this to unplugin-icons project instead. Sorry about the noise it created.

[chenxch]

By comparing the code, you will find that the file compiled by the vite3 version has become larger because it retains the variable judgment code that should be excluded from the original compilation. Check the document and find that the following changes have been made:
Migration from v2
process.env.* is now preserved in library mode

[chenxch]

Add the following code, the compilation result will be the same as vite2.

// vite.config.ts

  define: {
    "process.env.NODE_ENV": JSON.stringify(process.env.NODE_ENV),
  },

[pwang2]

Thank you @chenxch. Should have read the migration log first.

[chenxch]

You're welcome😉