[Webkit-unassigned] [Bug 178002] New: Retargeting algorithm is not correctly running in elementFromPoint

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=178002

            Bug ID: 178002
           Summary: Retargeting algorithm is not correctly running in
                    elementFromPoint
           Product: WebKit
           Version: Safari 11
          Hardware: Macintosh
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: HTML DOM
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: elkurin at google.com
                CC: cdumez at apple.com

elementFromPoint bug
shadowRoot.elementFromPoint(a host child which is the text node) should return the host node but now is returning the assigned slot node instead.

JS Code:
http://jsbin.com/pelidinuka/1/edit?html,js,output

According to the shadow dom spec 7.1 NOTE, elementFromPoint runs the Retargeting Algorithm.
Retargeting Algorithm is described in this URL.
https://w3c.github.io/webcomponents/spec/shadow/#retarget

By running this algorithm, the selected node itself (in this case, the parent of the node because the node is the text node) should be returned.

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