TreeWalker.filter - Web APIs 编辑

The TreeWalker.filter read-only property returns a NodeFilter that is the filtering object associated with the TreeWalker.

When creating the TreeWalker, the filter object is passed in as the third parameter, and its method NodeFilter.acceptNode() is called on every single node to determine whether or not to accept it.

Syntax

nodeFilter = treeWalker.filter;

Example

var treeWalker = document.createTreeWalker(
    document.body,
    NodeFilter.SHOW_ELEMENT,
    { acceptNode: function(node) { return NodeFilter.FILTER_ACCEPT; } },
    false
);
nodeFilter = treeWalker.filter; // document.body in this case

Specifications

Browser compatibility

BCD tables only load in the browser

See also

• The TreeWalker interface it belongs to.