Fix regression for handling mouseenter/mouseleave events introduced by #33310
#33679
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there is a regression introduced by twbs#33310 - this would have catched that
…wbs#33310 the old logic only worked for parent-child movement since it checked for the relatedTarget to contain the delegateTarget - this should be fixed with this
mdo
approved these changes
Apr 19, 2021
mouseenter/mouseleave events introduced by #33310
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Sorry had a little logic error with this.
The old logic was based on
relatedTargetto contain thedelegatedTarget.This is correct while moving from the parent onto a child element (
mouseover) with therelatedTargetbeing the parent element that contains thedelegatedTarget(child). And also while moving from the child onto the parent (mouseout) with therelatedTargetbeing the parent element that contains thedelegatedTarget(child).So for parent-child relationships this was working totally fine.
The problem comes when moving onto sibling or unconnected elements. The updated logic should handle this properly now, as it checks for the
delegatedTargetnot to contain therelatedTarget. Which is the case for parent (related) -- mouseover --> child (delegated) and parent (related) <-- mouseout -- child (delegated) movements. And also with sibling/unconnected (related) -- mouseover --> listener (delegated) and sibling/unconnected (related) <-- mouseout -- listener (delegated).Sorry again.. 😓