[data grid] @mui/x-virtualizer TypeScript error

[Methuselah96]

Steps to reproduce

Steps:

1. Create TypeScript project with a strict package manager that uses @mui/x-data-grid with skipLibCheck turned off
2. Run type-checking

Current behavior

Type errors:

Error: ../../node_modules/.pnpm/@mui+x-virtualizer@0.1.0_@mui+system@7.2.0_@emotion+react@11.14.0_@types+react@19.1.9_r_f72b9c4b222fe6db574016499504508e/node_modules/@mui/x-virtualizer/esm/features/dimensions.d.ts(28,53): error TS2307: Cannot find module '@mui/x-internals/throttle/throttle' or its corresponding type declarations.
Error: ../../node_modules/.pnpm/@mui+x-virtualizer@0.1.0_@mui+system@7.2.0_@emotion+react@11.14.0_@types+react@19.1.9_r_f72b9c4b222fe6db574016499504508e/node_modules/@mui/x-virtualizer/esm/useVirtualizer.d.ts(117,55): error TS2307: Cannot find module '@mui/x-internals/throttle/throttle' or its corresponding type declarations.

Expected behavior

No type errors

Context

No response

Your environment

npx @mui/envinfo

  System:
    OS: Windows 11 10.0.26100
  Binaries:
    Node: 22.15.0 - C:\Program Files\nodejs\node.EXE
    npm: 10.9.2 - C:\Program Files\nodejs\npm.CMD
    pnpm: 10.13.1 - C:\Program Files\nodejs\pnpm.CMD
  Browsers:
    Chrome: Not Found
    Edge: Chromium (131.0.2903.70)
  npmPackages:
    react: ^19.1.0 => 19.1.0
    react-dom: ^19.1.0 => 19.1.0
    typescript: ~5.9.2 => 5.9.2

Search keywords: x-virtualizer typescript

[MBilalShafi]

@Methuselah96 Could you share a project where this error is reproducible? I tested with skipLibCheck enabled in a fresh TypeScript project using Data Grid v8.9.2, and I didn’t encounter any TypeScript issues.

You can follow this guide to create a minimal reproduction:
https://mui.com/x/introduction/support/#bug-reproductions

[Methuselah96]

Here is a project where the error is reproducible. It's just the Vite template using pnpm with the getting started MUI data grid and skipLibCheck set to false.

Steps to reproduce:

1. Clone https://github.com/Methuselah96/mui-data-grid-ts-error
2. Run pnpm install (assuming you have pnpm installed)
3. Run pnpm run build

Observe errors

[MBilalShafi]

Thanks @Methuselah96, it's reproducing now.

@romgrk, since it's related to x-virtualizer, feel free to take it up or I'll try to take a look early next week.

[romgrk]

I took a quick look but was puzzled by it, I'll also come back to this next week.