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## Summary Follow up from https://github.com/facebook/react/pull/22010. As suggested by @motiz88, update the way the react sources metadata is stored within the fb sources metadata. Specifically, instead of `x_facebook_sources` directly containing a hook map in the second position of the metadata tuple for a given source, it contains the react sources metadata itself, which is also a tuple of react sources metadata for a given source, and which contains the hook map in the first position. This way the react sources metadata tuple can be extended to contain more react-specific metadata without taking up more positions in the top-level facebook sources metadata. As part of this change: - Adds more precise Flow types, mostly borrowed from Metro - Fixes the facebook sources field name (we were using `x_fb_sources` but it should be `x_facebook_sources` ## Test Plan - yarn flow - yarn test - yarn test-build-devtools
This is the source code for the React DevTools browser extension.
Installation
The easiest way to install this extension is as a browser add-on:
Local development
You can also build and install this extension from source.
Prerequisite steps
DevTools depends on local versions of several NPM packages1 also in this workspace. You'll need to either build or download those packages first.
1 Note that at this time, an experimental build is required because DevTools depends on the createRoot API.
Build from source
To build dependencies from source, run the following command from the root of the repository:
yarn build-for-devtools
Download from CI
To use the latest build from CI, run the following commands starting from the root of the repository:
cd scripts/release
yarn install
./download-experimental-build.js
Build steps
Once the above packages have been built or downloaded, you can build the extension by running:
cd packages/react-devtools-extensions/
yarn build:chrome # => packages/react-devtools-extensions/chrome/build
yarn run test:chrome # Test Chrome extension
yarn build:firefox # => packages/react-devtools-extensions/firefox/build
yarn run test:firefox # Test Firefox extension