Handle edge cases in with-constrained-tabbing. #10174
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aduth
approved these changes
Sep 27, 2018
| * When pressing Tab and none of the tabbables has focus, the keydown | ||
| * event happens on the wrapper div: move focus on the first tabbable. | ||
| */ | ||
| } else if ( ! tabbables.includes( event.target ) ) { |
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Would it be enough to test event.target === this.focusContainRef.current ? More optimized, more explicit to what we are testing.
Or are there other cases where the target of the tab press would itself not be tabbable? I guess might account for elements with tabIndex=-1 within the content? If so, should be update the comment to reflect this?
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Yep it would be nicer and simpler. Unfortunately, it doesn't work on IE11 where the event.target seems to be the clicked children element in the content. See below, in order:
- event.target
- event.currentTarget
- this.focusContainRef.current
Checks edge cases in withConstrainedTabbing.
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Added tests co-authored with @talldan. Should be ready to merge. |
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Description
Handle edge cases to keep tabbing constrained in
withConstrainedTabbing, for example when clicking in the content and then pressing Tab. See conversation on #9973To test:
Previously, focus went to the document root.
By adding
tabIndex="-1"to thewithConstrainedTabbingit is possible to detect when theevent.targetis not the firstTabbable orlastTabbable. This happens, for example when the content is clicked and then Tab is pressed again. In this edge case, focus is moved to the first tabbable.Fixes #10165