[Bug 28107] New: TreeWalker nextNode never ascends the tree

https://www.w3.org/Bugs/Public/show_bug.cgi?id=28107

            Bug ID: 28107
           Summary: TreeWalker nextNode never ascends the tree
           Product: WebAppsWG
           Version: unspecified
          Hardware: PC
                OS: Windows NT
            Status: NEW
          Severity: normal
          Priority: P2
         Component: DOM
          Assignee: [email protected]
          Reporter: [email protected]
        QA Contact: [email protected]
                CC: [email protected], [email protected]

The https://dom.spec.whatwg.org/#dom-treewalker-nextnode algorithm seems wrong
to me. It only ever seems to descend to the first child of a node, or to its
sibling, but never returns to a higher level.
In contrast, its dual https://dom.spec.whatwg.org/#dom-treewalker-previousnode
does "Set node to its parent." when no more siblings are found.
This also would be consistent to the
http://www.w3.org/TR/DOM-Level-2-Traversal-Range/traversal.html#Traversal-TreeWalker-nextNode,
which says the method should "Moves the TreeWalker to the next visible node in
document order relative to the current node".

Btw, where did the
http://www.w3.org/TR/DOM-Level-2-Traversal-Range/traversal.html#Traversal-overview
sections go? They seemed quite helpful, what's the reason they were omitted
from the current spec?

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