[Webkit-unassigned] [Bug 171113] New: Incorrect position when dragging jQuery Draggable elements with position fixed after pinch zoom
bugzilla-daemon at webkit.org
bugzilla-daemon at webkit.org
Fri Apr 21 08:10:20 PDT 2017
https://bugs.webkit.org/show_bug.cgi?id=171113
Bug ID: 171113
Summary: Incorrect position when dragging jQuery Draggable
elements with position fixed after pinch zoom
Product: WebKit
Version: Safari 10
Hardware: All
OS: All
Status: NEW
Severity: Normal
Priority: P2
Component: HTML DOM
Assignee: webkit-unassigned at lists.webkit.org
Reporter: zach.peters at pearson.com
CC: cdumez at apple.com
Created attachment 307730
--> https://bugs.webkit.org/attachment.cgi?id=307730&action=review
The zip file contains an example html page along with jQuery touch punch for testing on mobile devices.
After doing a pinch zoom if you try to drag a jQuery Draggable element with the style position fixed then the element jumps before beginning to drag. I've attached an example html page that can be used to reproduce this. This issue happens on normal Safari browser as well as inside an iOS app using Webkit.
NOTE: After you pinch zoom you need to make sure the viewport is not in the top left corner of the document. As you move the viewport further to the bottom right of the document the "jump" before dragging becomes larger and larger.
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