[Webkit-unassigned] [Bug 213603] New: iOS pageZoom API confusing usage

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=213603

            Bug ID: 213603
           Summary: iOS pageZoom API confusing usage
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: iPhone / iPad
                OS: Other
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: WebKit Misc.
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: rkgibson at google.com

Created attachment 402732

  --> https://bugs.webkit.org/attachment.cgi?id=402732&action=review

Screenshots comparing pageZoom WKWebView and Safari zoom

On iPhone, the pageZoom numbers seem backwards and have very different behavior when compared to the Safari Zoom feature. When the pageZoom increases from 1 -> 1.5, the size of the text on the page gets smaller. The page also becomes wider, so that content flows out of the viewport. When pageZoom goes from 1 -> 0.5, the text actually becomes bigger. Is this the intended behavior of the property?

I've attached screenshots of comparisons between the pageZoom property and the Safari Zoom feature at different zoom levels.

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