TreeWalker.firstChild()

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.

SyntaxEdit

node = treeWalker.firstChild;

ExampleEdit

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

SpecificationsEdit

Browser compatibilityEdit

See alsoEdit

• The TreeWalker interface it belongs to.