(Do not recommend anymore, please use unplugin-dts instead)

pnpm i -D vite-plugin-dts

In vite.config.ts:

import { resolve } from 'path'
import { defineConfig } from 'vite'
import dts from 'vite-plugin-dts'

export default defineConfig({
  build: {
    lib: {
      entry: resolve(__dirname, 'src/index.ts'),
      name: 'MyLib',
      formats: ['es'],
      fileName: 'my-lib',
    },
  },
  plugins: [dts()],
})

By default, the generated declaration files are following the source structure.

Fortunately, with the help of API Extractor, the plugin can bundle all types into a single file. You just need to install @microsoft/api-extractor and set bundleTypes: true:

export default defineConfig({
  plugins: [dts({ bundleTypes: true })],
})

If you start with official Vite template, you should specify the tsconfigPath:

export default defineConfig({
  plugins: [dts({ tsconfigPath: './tsconfig.app.json' })],
})

For full documentation, please refer to unplugin-dts.

A real project using this plugin: Vexip UI.

MIT License.