Ensure that the first wheel event dispatched is sent to the initial target #53331
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…arget. THe UIEvents spec states: > For maximum scroll performance, a user agent may not wait for each > wheel event associated with the scroll to be processed... As a result, a scroll (and scroll event) may be dispatched before the first wheel event is dispatched. To counteract this, the first wheel scroll for each test should be entirely contained in the initial element. This ensures that the test will remain vaild even in the case that the scroll is dispatched before the wheel event.
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The UIEvents spec states:
As a result, a scroll (and scroll event) may be dispatched before the first wheel event is dispatched. To counteract this, the first wheel scroll for each test should be entirely contained in the initial element. This ensures that the test will remain vaild even in the case that the scroll is dispatched before the wheel event.