[Webkit-unassigned] [Bug 220197] WKWebView inside a fullscreen quicklook preview lag while page scrolling

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=220197

--- Comment #6 from sbarex at gmail.com ---
(In reply to Simon Fraser (smfr) from comment #5)
> Please give instructions about how to use your test project to get
> fullscreen QuickLook. Should I run the QLTest target and choose "Open
> QuickLook for a test file"?
> 
> What macOS version are you testing on? Does the bug only occur on some OS
> versions?

You must open the quicklook preview from the finder (open from the app do not show the fullscreen button!). 
Follow these steps:
- download the precompiled test app from https://github.com/sbarex/QLTest/releases
- move the app on the Applications folder (this force the detection of the ql extension)
- launch the app and push on the button "browse for a test file" to select a test file on the finder. 
- From the selected file on Finder open the quicklook preview.
- Maximize the preview to fullscreen.

I'm using Big Sur 11.1 (Intel). On Catalina I do not detect this bug.

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