Add guard around FocusWithin responder root events #18080
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facebook-github-bot
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React Core Team
gaearon
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Feb 19, 2020
| @@ -36,7 +36,7 @@ type FocusState = { | |||
| isFocused: boolean, | |||
| isFocusVisible: boolean, | |||
| pointerType: PointerType, | |||
| ... | |||
| addedRootEvents?: boolean, | |||
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Does it need to be optional?
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Let's make it just boolean.
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We don't use it in the Focus responder, only the FocusWithin responder. I didn't want to add more code to the state of that responder, so I opted to keep it optional for now. Breaking all the call-sites down by alternative state would make this a far more complex PR.
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We've run into an interesting problem internally that is likely due to a strange set of events from the recent
onBeforeBlurchange, causingaddRootEventTypesto try and add the same event before removing it. This change should guard the change to prevent the invariant from occuring in these cases.I'll try and make a repro test tomorrow and see if there's an alternative way to fix this.