JSX in TypeScript namespace causes error

[AmazingShine]

Describe the bug

Jsx in namespace is not supported, similar to this bug: #22413

Reproduction

pnpm create vite demo --template react-ts

Steps to reproduce

https://stackblitz.com/edit/vitejs-vite-o1zmeh?file=src%2FApp.tsx&terminal=dev

Create a official demo: pnpm create vite demo --template react-ts.
And then write the following code:

import { useState } from 'react'
import reactLogo from './assets/react.svg'
import './App.css'

namespace AAA {
    export const Hello = () => <div>Hello</div>
}

function App() {
  const [count, setCount] = useState(0)

  return (
    <div className="App">
        <AAA.Hello></AAA.Hello>
    </div>
  )
}

export default App

System Info

System:
    OS: Linux 5.19 Arch Linux
    CPU: (16) x64 11th Gen Intel(R) Core(TM) i7-11700K @ 3.60GHz
    Memory: 20.67 GB / 31.17 GB
    Container: Yes
    Shell: 5.9 - /usr/bin/zsh
  Binaries:
    Node: 16.16.0 - ~/.nvm/versions/node/v16.16.0/bin/node
    Yarn: 1.22.10 - /usr/bin/yarn
    npm: 8.11.0 - ~/.nvm/versions/node/v16.16.0/bin/npm

Used Package Manager

pnpm

Logs

This error occured:

Internal server error: Transform failed with 1 error:
.../demo/src/App.tsx:14:5: ERROR: Cannot use "this" here:

Validations

• Follow our Code of Conduct
• Read the Contributing Guidelines.
• Read the docs.
• Check that there isn't already an issue that reports the same bug to avoid creating a duplicate.
• Make sure this is a Vite issue and not a framework-specific issue. For example, if it's a Vue SFC related bug, it should likely be reported to vuejs/core instead.
• Check that this is a concrete bug. For Q&A open a GitHub Discussion or join our Discord Chat Server.
• The provided reproduction is a minimal reproducible example of the bug.

[sapphi-red]

For automatic runtime, Vite uses babel to transform JSX and esbuild to transform TS.

// input
namespace AAA {
  export const Hello = () => <div>Hello</div>
}

// output from babel
namespace AAA {
  export const Hello = () => /*#__PURE__*/_jsxDEV("div", {
    children: "Hello"
  }, void 0, false, {
    fileName: _jsxFileName,
    lineNumber: 5,
    columnNumber: 30
  }, this);
  _c = Hello;
}

This output uses this in namespace and esbuild throws an error for that. Vite needs to inject a custom babel plugin to babel to transform this this to void 0. vitejs/vite#9590 might fix this indirectly.

---

For classic runtime, Vite uses babel to add debug information and esbuild to transform JSX+TS.

// input
namespace AAA {
  export const Hello = () => <div>Hello</div>
}

// output from babel
namespace AAA {
  export const Hello = () => <div __self={this} __source={{
    fileName: _jsxFileName,
    lineNumber: 5,
    columnNumber: 30
  }}>Hello</div>;
  _c = Hello;
}

We need to use a similar babel plugin for this case too.

[sapphi-red]

Closing as I confirmed plugin-react 3.0.0 works with this. plugin-react now uses esbuild to transform JSX and I think that fixed this.