aboutsummaryrefslogtreecommitdiff
path: root/files/zh-cn/web/api/element/getattributenode
diff options
context:
space:
mode:
authorPeter Bengtsson <mail@peterbe.com>2020-12-08 14:40:17 -0500
committerPeter Bengtsson <mail@peterbe.com>2020-12-08 14:40:17 -0500
commit33058f2b292b3a581333bdfb21b8f671898c5060 (patch)
tree51c3e392513ec574331b2d3f85c394445ea803c6 /files/zh-cn/web/api/element/getattributenode
parent8b66d724f7caf0157093fb09cfec8fbd0c6ad50a (diff)
downloadtranslated-content-33058f2b292b3a581333bdfb21b8f671898c5060.tar.gz
translated-content-33058f2b292b3a581333bdfb21b8f671898c5060.tar.bz2
translated-content-33058f2b292b3a581333bdfb21b8f671898c5060.zip
initial commit
Diffstat (limited to 'files/zh-cn/web/api/element/getattributenode')
-rw-r--r--files/zh-cn/web/api/element/getattributenode/index.html48
1 files changed, 48 insertions, 0 deletions
diff --git a/files/zh-cn/web/api/element/getattributenode/index.html b/files/zh-cn/web/api/element/getattributenode/index.html
new file mode 100644
index 0000000000..47d7e5c206
--- /dev/null
+++ b/files/zh-cn/web/api/element/getattributenode/index.html
@@ -0,0 +1,48 @@
+---
+title: Element.getAttributeNode()
+slug: Web/API/Element/getAttributeNode
+tags:
+ - API
+ - DOM
+translation_of: Web/API/Element/getAttributeNode
+---
+<p>{{ APIRef("DOM") }}</p>
+
+<h2 id="概要">概要</h2>
+
+<p>返回指定元素的指定属性节点</p>
+
+<h2 id="语法">语法</h2>
+
+<pre class="eval"><em>var attrNode</em> = <em>element</em>.getAttributeNode(<em>attrName</em>);
+</pre>
+
+<ul>
+ <li><code>attrNode</code>  获得的属性返回值,是Attr 节点, nodeType 为 2</li>
+ <li><code>attrName</code> 是一个包含属性名称的 字符串</li>
+</ul>
+
+<h2 id="举例">举例</h2>
+
+<pre>// html: &lt;div id="top" /&gt;
+var t = document.getElementById("top");
+var idAttr = t.getAttributeNode("id");
+alert(idAttr.value == "top")
+</pre>
+
+<h2 id="注意">注意</h2>
+
+<p>当在一个被标记为HTML文档的DOM中的HTML元素上调用这个方法时, getAttributeNode会将参数转变为小写形式。</p>
+
+<p>Attr 节点继承自Node,但不被认为是文档树的一部分。Node上定义的常用属性,如 parentNode, previousSibling, 和 nextSibling 对于 Attr节点来说都为null。然而,你可以使用 ownerElement 来得到拥有这个属性的元素。</p>
+
+<p><a href="/en/DOM/element.getAttribute" title="en/DOM/element.getAttribute">getAttribute</a> 通常用于替换getAttributeNode方法,来获得元素的属性值。性能也更快.  性能对比是 element.id 大于 element.getAttribute('id') 大于 element.getAttributeNode('id').nodeValue.</p>
+
+<p>{{ DOMAttributeMethods() }}</p>
+
+<h2 id="规范">规范</h2>
+
+<ul>
+ <li><a class="external" href="http://www.w3.org/TR/DOM-Level-2-Core/core.html#ID-217A91B8">DOM Level 2 Core: getAttributeNode</a> (introduced in <a class="external" href="http://www.w3.org/TR/REC-DOM-Level-1/level-one-core.html#method-getAttributeNode">DOM Level 1 Core</a>)</li>
+ <li><a class="external" href="http://www.whatwg.org/specs/web-apps/current-work/multipage/dom.html#apis-in-html-documents">HTML 5: APIs in HTML documents</a></li>
+</ul>