Implement ChildNode::before & ChildNode::after #2068
Merged
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Continued from #6536
The current implementations of
ChildNode::before
andChildNode::after
do not match the WHATWG spec. This commit updates theimplementations to match the spec.
Our current implementation of
ChildNode::after
passes all the WPTtests. So I made sure to add a regression test that failed with the
current implementation. There are a few other unit tests I added
to exhaust other corner cases I encountered.