From b9afb23d12dcae1e09f8d04c72143c5ddaa34aea Mon Sep 17 00:00:00 2001 From: Peter Bengtsson Date: Fri, 16 Jul 2021 16:27:00 -0400 Subject: delete conflicting/orphaned docs (zh-CN) (#1412) * delete conflicting docs (zh-CN) * and redirects * do orphaned as well * fix * remove more orphans * revert orphaned docs that can identify origin * move orphaned docs to current loc * adjust slug path * fix redirect change from rebase Co-authored-by: Irvin --- .../web/api/element/lastelementchild/index.html | 99 ++++++++++++++++++++++ 1 file changed, 99 insertions(+) create mode 100644 files/zh-cn/web/api/element/lastelementchild/index.html (limited to 'files/zh-cn/web/api/element/lastelementchild') diff --git a/files/zh-cn/web/api/element/lastelementchild/index.html b/files/zh-cn/web/api/element/lastelementchild/index.html new file mode 100644 index 0000000000..21a33fd6b6 --- /dev/null +++ b/files/zh-cn/web/api/element/lastelementchild/index.html @@ -0,0 +1,99 @@ +--- +title: Element.lastElementChild +slug: Web/API/Element/lastElementChild +translation_of: Web/API/Element/lastElementChild +tags: + - API + - DOM + - Element + - Property +browser-compat: api.Element.lastElementChild +--- +

{{ APIRef("DOM") }}

+ +

只读属性 Element.lastElementChild 返回对象的最后一个子{{domxref("Element", "元素")}}，如果没有子元素，则返回 null。

+ +
+

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

+
+ +

语法

+ +
var element = node.lastElementChild;
+ +

例子

+ +
<ul id="foo">
+  <li>First  (1)</li>
+  <li>Second (2)</li>
+  <li>Third  (3)</li>
+</ul>
+
+<script>
+var foo = document.getElementById('foo');
+// yields: Third  (3)
+console.log(foo.lastElementChild.textContent);
+</script>
+
+ +

适用于 IE8、IE9 和 Safari 的 Polyfill

+ +
// 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);
+
+ +

规范

+ + + + + + + + + + + + + + + + + + + +
规范状态备注
{{SpecName('DOM WHATWG', '#dom-Element-lastelementchild', 'Element.lastElementChild')}}{{Spec2('DOM WHATWG')}}Splitted the ElementTraversal interface in {{domxref("ChildNode")}} and Element. This method is now defined on the latter.
+ The {{domxref("Document")}} and {{domxref("DocumentFragment")}} implemented the new interfaces.
{{SpecName('Element Traversal', '#attribute-lastElementChild', 'ElementTraversal.lastElementChild')}}{{Spec2('Element Traversal')}}Added its initial definition to the ElementTraversal pure interface and use it on {{domxref("Element")}}.
+ +

浏览器兼容性

+ + + +

{{Compat("api.Element.lastElementChild")}}

+ +

参见

+ + -- cgit v1.2.3-54-g00ecf