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Stacked on https://github.com/facebook/react/pull/28351, please review only the last commit. Top-level description of the approach: 1. Once user selects an element from the tree, frontend asks backend to return the inspected element, this is where we simulate an error happening in `render` function of the component and then we parse the error stack. As an improvement, we should probably migrate from custom implementation of error stack parser to `error-stack-parser` from npm. 2. When frontend receives the inspected element and this object is being propagated, we create a Promise for symbolicated source, which is then passed down to all components, which are using `source`. 3. These components use `use` hook for this promise and are wrapped in Suspense. Caching: 1. For browser extension, we cache Promises based on requested resource + key + column, also added use of `chrome.devtools.inspectedWindow.getResource` API. 2. For standalone case (RN), we cache based on requested resource url, we cache the content of it.
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