Bug: JSX namespace not being recognized in vite TSX context

Describe the bug

`JSX element implicitly has type 'any' because no interface 'JSX.IntrinsicElements' exists.` error with jsx and vite.

To Reproduce

1. Setup a vite project with this config: 

import { defineConfig } from 'vite';

export default defineConfig({
  esbuild: {
    jsxFactory: 'jsx',
    jsxFragment: 'Fragment',
    jsxInject: `import { jsx, jsxs, Fragment } from 'million/jsx-runtime'`,
  },
});

2. Create a `index.tsx` and `index.html`, and import the tsx file.
3. Write some jsx
4. View intellisense errors

Expected behavior

Should not have this error and vite should use the JSX namespace

Screenshots

N/A

Operating System

MacOS Monterey

Browser

Brave 1.29.77 Chromium: 93.0.4577.63 (Official Build) (arm64)

Additional context

N/A

[hyrious]

Let’s clarify that here are two concepts:

• bundlers reads exports to resolve js file, which is exactly dist/jsx-runtime.js. They have no reason to choose ./jsx-runtime because exports has the highest priority and once set, there can only be those paths to be exported.

• typescript reads types (for entry point) and tsconfig (if exist) to resolve types. Other paths are mapped to be related to the root of package folder.

That is to say, typescript does not know the exports field (at least now), since it already has paths in tsconfig.

(There’s a deprecated field called typeVersion which can redirect type path, but I don’t recommend that.)

In conclusion, here’s a valid pkg stucture if your exports.jsx-runtime is set to ./dist/jsx-runtime.js:

./dist/jsx-runtime.js
./jsx-runtime.d.ts

Another one (also valid):

./dist/jsx-runtime.js
./jsx-runtime/index.d.ts

Yet another one:

./dist/jsx-runtime.js
./dist/jsx-runtime.d.ts
./jsx-runtime.d.ts
  ^ contents: export * from "./dist/jsx-runtime"

[aidenybai]

Thanks! Your explanation was really helpful. I chose to go with the:

./dist/jsx-runtime.js
./dist/jsx-runtime.d.ts
./jsx-runtime.d.ts
  ^ contents: export * from "./dist/jsx-runtime"

In the commit I referenced