Свойство ParentNode.lastElementChild только для чтения. Возвращает последний дочерний элемент объекта или null если нет дочерних элементов.

This property was initially defined in the ElementTraversal pure interface. As this interface contained two distinct set of properties, one aimed at Node that have children, one at those that are children, they have been moved into two separate pure interfaces, ParentNode and ChildNode. In this case, lastElementChild moved to ParentNode. This is a fairly technical change that shouldn't affect compatibility.


var element = node.lastElementChild; 


<ul id="foo">
  <li>First  (1)</li>
  <li>Second (2)</li>
  <li>Third  (3)</li>

var foo = document.getElementById('foo');
// yields: Third  (3)

Polyfill for IE8, IE9 and Safari

// Overwrites native 'lastElementChild' prototype.
// Adds Document & DocumentFragment support for IE9 & Safari.
// Returns array instead of HTMLCollection.
;(function(constructor) {
    if (constructor &&
        constructor.prototype &&
        constructor.prototype.lastElementChild == null) {
        Object.defineProperty(constructor.prototype, 'lastElementChild', {
            get: function() {
                var node, nodes = this.childNodes, i = nodes.length - 1;
                while (node = nodes[i--]) {
                    if (node.nodeType === 1) {
                        return node;
                return null;
})(window.Node || window.Element);


Specification Status Comment
Определение 'ParentNode.lastElementChild' в этой спецификации.
Живой стандарт Splitted the ElementTraversal interface in ChildNode and ParentNode. This method is now defined on the latter.
The Document and DocumentFragment implemented the new interfaces.
Element Traversal Specification
Определение 'ElementTraversal.lastElementChild' в этой спецификации.
Устаревшая Added its initial definition to the ElementTraversal pure interface and use it on Element.

Совместимость с браузерами

We're converting our compatibility data into a machine-readable JSON format. This compatibility table still uses the old format, because we haven't yet converted the data it contains. Find out how you can help!
Feature Chrome Firefox (Gecko) Internet Explorer Opera Safari
Basic support (on Element) 1.0 3.5 (1.9.1) 9.0 10.0 4.0
Support on Document and DocumentFragment 29.0 25.0 (25.0) Нет 16.0 Нет
Feature Android Firefox Mobile (Gecko) IE Mobile Opera Mobile Safari Mobile
Basic support (on Element) (Да) 1.0 (1.9.1) (Да) (Да) (Да)
Support on Document and DocumentFragment (Да) 25.0 (25.0) Нет 16.0 Нет

Так же смотрите