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Some context: - When user selects an element in tree inspector, we display current state of the component. In order to display really current state, we start polling the backend to get available updates for the element. Previously: - Straight-forward sending an event to get element updates each second. Potential race condition is not handled in any form. - If user navigates from the page, timeout wouldn't be cleared and we would potentially throw "Timed out ..." error. - Bridge disconnection is not handled in any form, if it was shut down, we could spam with "Timed out ..." errors. With these changes: - Requests are now chained, so there can be a single request at a time. - Handling both navigation and shut down events. This should reduce the number of "Timed out ..." errors that we see in our logs for the extension. Other surfaces will also benefit from it, but not to the full extent, as long as they utilize "resumeElementPolling" and "pauseElementPolling" events. Tested this on Chrome, running React DevTools on multiple tabs, explicitly checked the case when service worker is in idle state and we return back to the tab.
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