I need to start clarifying where things are really actually Fibers and where they're not since I'm adding Server Components as a separate type of component instance which is not backed by a Fiber. Nothing in the front end should really know anything about what kind of renderer implementation we're inspecting and indeed it's already not always a "Fiber" in the legacy renderer. We typically refer to this as a "Component Instance" but the front end currently refers to it as an Element as it historically grew from the browser DevTools Elements tab. I also moved the renderer.js implementation into the `backend/fiber` folder. These are at the same level as `backend/legacy`. This clarifies that anything outside of this folder ideally shouldn't refer to a "Fiber". console.js and profilingHooks.js unfortunately use Fibers a lot which needs further refactoring. The profiler frontend also uses the term alot.
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.
To install all necessary dependencies, run the following command from the root of the repository:
yarn install
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
yarn build:edge # => packages/react-devtools-extensions/edge/build
yarn run test:edge # Test Edge extension