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---
title: Element.attributes
slug: Web/API/Element/attributes
translation_of: Web/API/Element/attributes
---
<p>{{ APIRef("DOM") }}</p>
<p> </p>
<p>The <strong><code>Element.attributes</code></strong> property returns a live collection of all attribute nodes registered to the specified node. It is a {{domxref("NamedNodeMap")}}, not an <code>Array</code>, so it has no {{jsxref("Array")}} methods and the {{domxref("Attr")}} nodes' indexes may differ among browsers. To be more specific, <code>attributes</code> is a key/value pair of strings that represents any information regarding that attribute.</p>
<p> </p>
<p>Element.attribute 特性會把特定節點裡所有的屬性變成一個集合,然後回傳出來. 這是一個 <a href="https://developer.mozilla.org/en-US/docs/Web/API/NamedNodeMap">NamedNodeMap</a>, 而並非一個陣列. 所以它並沒有陣列的方法和在瀏覽器中 <a href="https://developer.mozilla.org/en-US/docs/Web/API/Attr">Attr</a>節點裡的索引值也可能不同. 更詳細的來說, attributes 是一個鍵/值的配對, 它包含了所有有關於這個節點屬性的資訊</p>
<p> </p>
<p>Syntax</p>
<pre class="syntaxbox">var <em>attr</em> =<em> element</em>.attributes;
</pre>
<h2 id="Example" name="Example">Example</h2>
<h3 id="Basic_examples">Basic examples</h3>
<pre class="brush: js">// Get the first <p> element in the document
var para = document.getElementsByTagName("p")[0];
var atts = para.attributes;</pre>
<h3 id="Enumerating_elements_attributes" name="Enumerating_elements_attributes">Enumerating elements attributes</h3>
<p>Numerical indexing is useful for going through all of an element's attributes.<br>
The following example runs through the attribute nodes for the element in the document with id "paragraph", and prints each attribute's value.</p>
<pre class="brush: html"><!DOCTYPE html>
<html>
<head>
<title>Attributes example</title>
<script type="text/javascript">
function listAttributes() {
var paragraph = document.getElementById("paragraph");
var result = document.getElementById("result");
// First, let's verify that the paragraph has some attributes
if (paragraph.hasAttributes()) {
var attrs = paragraph.attributes;
var output = "";
for(var i = attrs.length - 1; i >= 0; i--) {
output += attrs[i].name + "->" + attrs[i].value;
}
result.value = output;
} else {
result.value = "No attributes to show";
}
}
</script>
</head>
<body>
<p id="paragraph" style="color: green;">Sample Paragraph</p>
<form action="">
<p>
<input type="button" value="Show first attribute name and value"
onclick="listAttributes();">
<input id="result" type="text" value="">
</p>
</form>
</body>
</html></pre>
<h2 id="Specifications">Specifications</h2>
<table class="standard-table">
<thead>
<tr>
<th scope="col">Specification</th>
<th scope="col">Status</th>
<th scope="col">Comment</th>
</tr>
</thead>
<tbody>
<tr>
<td>{{SpecName('DOM WHATWG', '#dom-element-attributes', 'Element.attributes')}}</td>
<td>{{Spec2('DOM WHATWG')}}</td>
<td>From {{SpecName('DOM3 Core')}}, moved from {{domxref("Node")}} to {{domxref("Element")}}</td>
</tr>
<tr>
<td>{{SpecName('DOM3 Core', 'core.html#ID-84CF096', 'Element.attributes')}}</td>
<td>{{Spec2('DOM3 Core')}}</td>
<td>No change from {{SpecName('DOM2 Core')}}</td>
</tr>
<tr>
<td>{{SpecName('DOM2 Core', 'core.html#ID-84CF096', 'Element.attributes')}}</td>
<td>{{Spec2('DOM2 Core')}}</td>
<td>No change from {{SpecName('DOM1')}}</td>
</tr>
<tr>
<td>{{SpecName('DOM1', 'level-one-core.html#ID-84CF096', 'Element.attributes')}}</td>
<td>{{Spec2('DOM1')}}</td>
<td>Initial definition.</td>
</tr>
</tbody>
</table>
<h2 id="Browser_compatibility">Browser compatibility</h2>
<p>{{Compat("api.Element.attributes")}}</p>
<h2 id="See_also">See also</h2>
<ul>
<li>{{domxref("NamedNodeMap")}}, the interface of the returned object</li>
<li>Cross-browser compatibility considerations: on <a class="external" href="http://www.quirksmode.org/dom/w3c_core.html#attributes" title="http://www.quirksmode.org/dom/w3c_core.html#attributes">quirksmode</a></li>
</ul>
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