[Webkit-unassigned] [Bug 178583] New: Enable ability to prevent scrolling in Element.focus()

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=178583

            Bug ID: 178583
           Summary: Enable ability to prevent scrolling in Element.focus()
           Product: WebKit
           Version: Safari Technology Preview
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: HTML DOM
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: jihyerish at gmail.com
                CC: cdumez at apple.com

There is a spec proposal to disable automatic scroll into view on Element.focus().

Here is the summary of current situation: https://github.com/whatwg/html/pull/2787#issuecomment-338193107

The new dictionary type "FocusOptions" with the “preventScroll" dictionary member is introduced.

The IDL of Element.focus() will change to: 

dictionary FocusOptions {
  boolean preventScroll = false;
};
void focus(optional FocusOptions options);

If preventScroll is omitted or false, then the element will be scrolled into view with UA-defined manners.
Otherwise, it disables scrolling triggered by focus().

Related tests:
https://github.com/w3c/web-platform-tests/pull/7915
https://github.com/w3c/web-platform-tests/pull/7917

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