TreeWalker to the previous visible node in document order relative to the current node, and returns the new node. If the current node has no previous node, or if the search for previousNode attempts to step upward from the TreeWalker's root node, returns null , and retains the current node.
@return The new node, or null if the current node has noprevious node in the TreeWalker's logical view.
NULL if no previous Node.
@return the previous Node starting from the initially given Node using adepth-first-Search or NULL if no previous Node.
NULL if no previous Node.
@return the previous Node starting from the initially given Node using adepth-first-Search or NULL if no previous Node.
Node in the set being iterated over, ornull if there are no more members in that set.
@exception DOMException INVALID_STATE_ERR: Raised if this method is called after the detach method was invoked.
TreeWalker to the previous visible node in document order relative to the current node, and returns the new node. If the current node has no previous node, or if the search for previousNode attempts to step upward from the TreeWalker's root node, returns null , and retains the current node.
@return The new node, or null if the current node has no previous node in the TreeWalker's logical view.
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