« DOM Reference « TreeWalker

The TreeWalker.firstChild() method moves the current Node to the first visible child of the current node, and returns the found child. It also moves the current node to this child. If no such child exists, returns null and the current node is not changed.


node = treeWalker.firstChild;


var treeWalker = document.createTreeWalker(
    { acceptNode: function(node) { return NodeFilter.FILTER_ACCEPT; } },
var node = treeWalker.firstChild(); // returns the first child of the root element, or null if none


Specification Status Comment
DOM Living Standard No change from Document Object Model (DOM) Level 2 Traversal and Range Specification
Document Object Model (DOM) Level 2 Traversal and Range Specification Recommendation Initial definition.

Browser compatibility

Feature Chrome Firefox (Gecko) Internet Explorer Opera Safari
Basic support 1.0 2.0 (1.8.1) 9.0 9.0 3.0
Feature Android Firefox Mobile (Gecko) IE Mobile Opera Mobile Safari Mobile
Basic support (Yes) 1.0 (1.8.1) (Yes) 9.0 3.0

See also

Document Tags and Contributors

Contributors to this page: Prachi_Dighe, teoli
Last updated by: Prachi_Dighe,