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Alex Hunt 8027067322 Implement saved window positioning per target (#53910 )

Summary:
Pull Request resolved: https://github.com/facebook/react-native/pull/53910

NOTE: Resubmission of D82236159 — The `electron-store` dependency is now replaced with a local implementation.

As titled. A long awaited quality of life improvement that we can now deliver with our desktop shell.

Window arrangements are saved per [`windowKey`](https://github.com/facebook/react-native/blob/da7bf9c54567aae62ff355b79e66f511cb382065/packages/dev-middleware/src/middleware/openDebuggerMiddleware.js#L193), mapping to each previously opened debugger target.

**Limitations**

- Does not save/restore macOS fullscreen app state.

Changelog: [Internal]

Reviewed By: motiz88

Differential Revision: D83070252

fbshipit-source-id: a77f106b6db31571313acd0270b87703e4de049d

2025-09-24 04:59:43 -07:00

__tests__

Demote electron to devDependency (#53438 )

2025-08-27 02:50:05 -07:00

bin

Update React Native DevTools binaries

2025-09-23 01:46:27 -07:00

src

Implement saved window positioning per target (#53910 )

2025-09-24 04:59:43 -07:00

package.json

Backout D82236159: [RN][debugger-shell] Implement saved window positioning per target (#53816 )

2025-09-19 02:38:00 -07:00

README.md

Scaffold debugger-shell package (#51688 )

2025-05-30 02:23:12 -07:00

README.md

@react-native/debugger-shell

Experimental Electron-based shell for React Native DevTools. This package is not part of React Native's public API.

Why Electron?

The React Native DevTools frontend is based on Chrome DevTools, which is a web app, but is not particularly portable: it's designed to run in Chromium, and Chromium only. Prior to @react-native/debugger-shell, we would run it in hosted mode in an instance of Chrome or Edge.

Relying on hosted mode presents a variety of UX issues in the debugging workflow, such as the need to ask developers to install a particular browser before they can debug in React Native, and the inability to foreground/reuse existing debugger windows when relaunching the debugger for the same app. In order to address these issues effectively, we fundamentally need to leave the browser sandbox and run the debugger in a shell we can bundle with React Native, and whose behavior we can control.

Electron is a tried-and-tested framework for the specific task of embedding a Chromium browser in a portable, customized shell. As a rule we'll hold a high bar for performance and reliability, and we'll only add features to the shell if they are strictly necessary to complement the DevTools frontend's built-in capabilities.