paganaye/vite-plugin-one

This is what I did so far.

Create a new app

npm create vite@latest

I chose (vanilla+typescript)

npm install --save-dev vite-plugin-typescript-transform

Well it did not complain. Then create a vite.config.ts with the sample from github

import ts from 'typescript';
import { defineConfig } from 'vite';
import { vitePluginTypescriptTransform } from 'vite-plugin-typescript-transform';

export default defineConfig({
  // ...your vite configuration
  plugins: [
    vitePluginTypescriptTransform({
      enforce: 'pre',
      filter: {
        files: {
          include: /\.ts$/,
        },
      },
      tsconfig: {
        override: {
          target: ts.ScriptTarget.ES2021,
        },
      },
    }),
  ],
});

npm run dev still works.

npm run build also works.

Nothing is broken

But how do I implement a transformer?