chore(fixtures): migrate attribute-behavior fixture to createRoot API #34716
+6
−3
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Summary
This PR migrates the fixtures folder to use the new createRoot API instead of the legacy ReactDOM.render.
The motivation is to align the test fixtures with the current recommended React API, ensuring consistency with React 18+.
How did you test this change?
Updated all fixture files to use createRoot.
Ran yarn test → all tests passed ✅.
Ran yarn test --prod to confirm behavior in production mode.
Manually tested the fixtures in local development to verify correct rendering.