React 18 support for Plugins - #2116
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-Changes the development and test versions of React, ReactDom, and react-test-renderer to the 18.2 version used in mattermost. - Swaps out the pre-React 18 version of `render` to `createRoot` and fixes some type errors that surface with React 18. - Removes unneeded and deprecated "@types/react-bootstrap": "1.0.1" in package.json
hmhealey
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Oct 31, 2025
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Thanks for redoing that. This looks much cleaner to me.
I'm a bit surprised that you only had to upgrade React and React DOM here since I ended up falling down a rabbit hole of related dependencies last time I tried this because NPM started complaining about other libraries like React Redux being incompatible. I thought that I might have my NPM set to be stricter somehow, but I'm able to build this branch just fine. Perhaps that issue was causing by some other dependency in the web app and I didn't need to change it elsewhere.
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calebroseland
approved these changes
Nov 3, 2025
calebroseland
approved these changes
Nov 3, 2025
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Summary
This replaces the prior PR that created mocks for reactBootstrap. My concern was that I didn't want to bundle our own version of react-bootstrap, but Jest couldn't access the external version. @calebroseland pointed out that just putting it into package.json didn't cause it to be bundled, but did mean that the development and test environments could use it. Thanks Caleb!
-Changes the development and test versions of React, ReactDom, and react-test-renderer to the 18.2 version used in mattermost.
rendertocreateRootTicket Link
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Checklist
Gated by experimental feature flagUnit tests updated