Bug 148781

Summary:	node.replaceChild(node.lastChild, node.firstChild) should add two mutation records
Product:	WebKit	Reporter:	Ryosuke Niwa <rniwa>
Component:	DOM	Assignee:	Nobody <webkit-unassigned>
Status:	RESOLVED DUPLICATE
Severity:	Normal	CC:	cdumez, webkit-bug-importer
Priority:	P2	Keywords:	InRadar
Version:	WebKit Nightly Build
Hardware:	Unspecified
OS:	Unspecified

Description Ryosuke Niwa 2015-09-03 20:18:54 PDT

Because of the way replaceChild is defined (https://dom.spec.whatwg.org/#dom-node-replacechild),
it should add two mutation records when the inserted node was originally a sibling of the reference child.

e.g. node.replaceChild(node.lastChild, node.firstChild) when node has two children.

This bug was found by the newly added test: LayoutTests/http/tests/w3c/dom/nodes/MutationObserver-childList.html

Comment 1 Radar WebKit Bug Importer 2015-09-03 20:19:40 PDT

<rdar://problem/22571887>

Comment 2 Chris Dumez 2015-09-24 16:16:59 PDT


*** This bug has been marked as a duplicate of bug 149546 ***