ParentNode mixin包含可以拥有子项的所有类型的 Node对象共有的方法和属性。
ParentNode 是一个原始接口，不能够创建这种类型的对象；它在 Element、Document 和 DocumentFragment 对象上被实现。
属性
ParentNode.children只读- Returns a live
HTMLCollectioncontaining all objects of typeElementthat are children of thisParentNode. ParentNode.firstElementChild只读- Returns the
Elementthat is the first child of thisParentNode, ornullif there is none. ParentNode.lastElementChild只读- Returns the
Elementthat is the last child of thisParentNode, ornullif there is none. ParentNode.childElementCount只读- Returns an
unsigned longgiving the amount of children that the object has.
方法
There is no inherited or specific and implemented methods.
规范
| Specification | Status | Comment |
|---|---|---|
| DOM ParentNode.firstElementChild |
Living Standard | Splitted the ElementTraversal interface in ChildNode and ParentNode. The firstElementChild, lastElementChild, and childElementCount properties are now defined on the latter.The Document and DocumentFragment implemented the new interfaces.Added the children property.Added the append() and prepend() methods. |
| Element Traversal Specification ElementTraversal' |
Recommendation | Added the initial definition of its properties to the ElementTraversal pure interface and use it on Element. |
浏览器兼容性
| Feature | Chrome | Firefox (Gecko) | Internet Explorer | Opera | Safari |
|---|---|---|---|---|---|
Basic support (on Element) |
1.0 | 3.5 (1.9.1) | 9.0 [1] | 10.0 | 4.0 |
Support on Document and DocumentFragment |
29.0 | 25.0 (25.0) | 未实现 | 16.0 | 未实现 |
append() and prepend() |
未实现 | 未实现 | 未实现 | 未实现 | 未实现 |
| Feature | Android | Firefox Mobile (Gecko) | IE Mobile | Opera Mobile | Safari Mobile |
|---|---|---|---|---|---|
Basic support (on Element) |
(Yes) | 1.0 (1.9.1) | (Yes) | (Yes) | (Yes) |
Support on Document and DocumentFragment |
(Yes) | 25.0 (25.0) | 未实现 | 16.0 | 未实现 |
append() and prepend() |
未实现 | 未实现 | 未实现 | 未实现 | 未实现 |
[1] Internet Explorer 6, 7 and 8 supported it, but erroneously returns Comment nodes as part of the results.
相关链接
- The
ChildNodepure interface.