[Webkit-unassigned] [Bug 137851] New: Embedded WebView flickers position: fixed elements during rapid scrolling events
bugzilla-daemon at webkit.org
bugzilla-daemon at webkit.org
Sat Oct 18 07:17:52 PDT 2014
https://bugs.webkit.org/show_bug.cgi?id=137851
Bug ID: 137851
Summary: Embedded WebView flickers position: fixed elements
during rapid scrolling events
Classification: Unclassified
Product: WebKit
Version: 528+ (Nightly build)
Hardware: Macintosh Intel
OS: Other
Status: NEW
Severity: Critical
Priority: P2
Component: Layout and Rendering
Assignee: webkit-unassigned at lists.webkit.org
Reporter: mikey.m at me.com
Created attachment 240063
--> https://bugs.webkit.org/attachment.cgi?id=240063&action=review
Video demonstrating the bug
Using an embedded WebView inside of an application using the WebKit framework produces
flickering of position: fixed elements while rapidly scrolling the page. This behavior
did not exist until OS X Yosemite, Developer Preview #5 — it is believed to be a result
of: https://bugs.webkit.org/show_bug.cgi?id=135135
Steps to Reproduce:
1. Create an application with an embedded WebView that uses the version 1 of the WebKit
provided WebView infrastructure. Not WKWebView. Normal WebView.
2. Load an HTML page with contains a position: fixed element
3. Scroll rapidly to produce flickering behavior
Expected Results:
The expected result is that the element stays statically fixed with no flickering during
scrolling events
Actual Results:
position: fixed HTML elements flicker during rapid scrolling events
Build Date & Platform:
First seen: OS X Yosemite, Developer Preview #5
Last tested: Intel Mac OS X 10.10, AppleWebKit/600.1.25
Notes:
This bug report is a copy of: <rdar://problem/18211024>
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