[Webkit-unassigned] [Bug 93755] New: ShadowRoot insertion point change aborts css transition

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=93755

           Summary: ShadowRoot insertion point change aborts css
                    transition
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Macintosh Intel
        OS/Version: Mac OS X 10.7
            Status: UNCONFIRMED
          Severity: Normal
          Priority: P2
         Component: HTML DOM
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: sorvell at chromium.org
                CC: dglazkov at chromium.org, dominicc at chromium.org


Created an attachment (id=157837)
 --> (https://bugs.webkit.org/attachment.cgi?id=157837&action=review)
Reduction showing unexpected result and expected result when altering dom not using an insertion point.

If an insertion point select attribute in a shadowRoot is changed synchronously with a css change that should provoke a transition, the transition does not occur.

It is possible to address this problem by using webkitRequestAnimationFrame to provoke the transition.

If this is the intended behavior it should be noted that it is unlike other similar changes to dom (e.g. appending a node to the document and provoking a transition on it can be done synchronously.)

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