[Webkit-unassigned] [Bug 189582] New: overflow-position before content-position / self-position

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=189582

            Bug ID: 189582
           Summary: overflow-position before content-position /
                    self-position
           Product: WebKit
           Version: Safari 11
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: CSS
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: ericwilligers at chromium.org

The properties
align-content, align-items, align-self, justify-content, justify-items, justify-self
should accept "safe end" i.e. <overflow-position> <content-position> or <overflow-position> <self-position>
but not "end safe" i.e. <content-position> <overflow-position> or <self-position> <overflow-position>

Blink and Firefox correctly reject "safe end".
However, Edge and Safari incorrectly accept "end safe" and incorrectly serialize "safe end" as "end safe".
http://jsfiddle.net/ericwilligers/cthjpbv0/

https://drafts.csswg.org/css-align-3/#property-index

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