Bug 226354

Summary:

VisualViewport fires lots scroll events for 0.5px offsets when scrolling on Retina iOS device

Product:

WebKit

Reporter:

Simon Fraser (smfr) <simon.fraser>

Component:

DOM

Assignee:

Nobody <webkit-unassigned>

Status:

NEW

Severity:

Normal

CC:

john.crim, simon.fraser, webkit-bug-importer

Priority:

Keywords:

InRadar

Version:

Safari Technology Preview

Hardware:

Unspecified

OS:

Unspecified

See Also:

https://bugs.webkit.org/show_bug.cgi?id=218465

Attachments:

Description	Flags
Testcase	none

Simon Fraser (smfr)

Reported 2021-05-27 13:38:39 PDT

Created attachment 429921 [details] Testcase When not zoomed, we should not be firing scroll events on the VisualViewport. However, we do, because of some 0.5px difference between the layout viewport and visual viewport, probably due to rounding. See testcase, test on iPad.

Attachments
Testcase (1.51 KB, text/html) 2021-05-27 13:38 PDT, Simon Fraser (smfr)	no flags	Details
View All Add attachment proposed patch, testcase, etc.

Radar WebKit Bug Importer

Comment 1 2021-05-27 13:38:58 PDT

<rdar://problem/78584763>

Simon Fraser (smfr)

Comment 2 2021-05-27 13:39:21 PDT

We also fire events on rubberbanding.

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