After initializing a fresh project with TypeScript

or manually installing

We don't support a way to "manually install" Docusaurus, it's unclear what you did

pnpm add --save-dev typescript @docusaurus/module-type-aliases @docusaurus/tsconfig @docusaurus/types

Not sure what this command is for exactly, but it's not a way to manually install Docusaurus

Inside index.ts first line, it says

Could not find a declaration file for module 'react'. '/home/qp/code/learn-islam/node_modules/.pnpm/[email protected]/node_modules/react/index.js' implicitly has an 'any' type.
  If the 'react' package actually exposes this module, consider sending a pull request to amend 'https://github.com/DefinitelyTyped/DefinitelyTyped/tree/master/types/react'

I was able to fix this by following react.dev/learn/typescript and adding 2 packages

pnpm add -D @types/react @types/react-dom

Hmm, yes, I agree that the React types should be added to our TS init template

I think we do not catch that issue in CI because our base TS config is not strict enough. I'll see how to make it stricter for V4.

This happens for pnpm in particular since it doesn't hoist types, and we see the error with pnpm run typecheck --strict

However, you shouldn't need @types/react-dom unless you use React DOM APIs directly. Our init template doesn't use React DOM, and React DOM APIs are less common in Docusaurus sites, so it's fine if we let users install those types later, if they ever need these APIs.