[Webkit-unassigned] [Bug 148086] New: Cannot change WKWebView scrollView deceleration rate

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=148086

            Bug ID: 148086
           Summary: Cannot change WKWebView scrollView deceleration rate
    Classification: Unclassified
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: iOS
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: WebKit2
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: wenson_hsieh at apple.com

Currently, developers are not able to change a WKScrollView's decelerationRate by explicitly setting it, e.g. webView.scrollView.decelerationRate = UIScrollViewDecelerationRateNormal; This fixes the deceleration rate to UIScrollViewDecelerationRateFast. This is because _preferredScrollDecelerationFactor in WKScrollView is not updated when [WKScrollView setDecelerationRate] is invoked, so when the snap points code determines whether the decelerationRate should be fast or whatever the preferred value is, the decelerationRate is always set to UIScrollViewDecelerationRateFast.

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