Add StrictMode level prop and createRoot unstable_strictModeLevel option#20849

Merged

bvaughn merged 5 commits intofacebook:masterfrom bvaughn:strict-mode-level-prop-and-create-root-option

Feb 24, 2021

+1,243-934

Commits on Feb 24, 2021

The exported '<React.StrictMode>' tag remains the same and opts legacy subtrees into strict mode level one ('mode == StrictModeL1'). This mode enables DEV-only double rendering, double component li…
Brian Vaughn
committed
Renamed strict mode constants
Brian Vaughn
committed
Renamed tests
Brian Vaughn
committed
Split strict effects mode into two flags
Brian Vaughn
committed
Add StrictMode 'unstable_level' prop and createRoot 'unstable_strictModeLevel' option
Brian Vaughn
committed