TreeWalker.previousSibling() - Web APIs 编辑

The TreeWalker.previousSibling() method moves the current Node to its previous sibling, if any, and returns the found sibling. If there is no such node, return null and the current node is not changed.

Syntax

node = treeWalker.previousSibling();

Example

var treeWalker = document.createTreeWalker(
    document.body,
    NodeFilter.SHOW_ELEMENT,
    { acceptNode: function(node) { return NodeFilter.FILTER_ACCEPT; } },
    false
);
var node = treeWalker.previousSibling(); // returns null as there is no previous sibiling

Specifications

Browser compatibility

BCD tables only load in the browser

See also

• The TreeWalker interface it belongs to.