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authorPeter Bengtsson <mail@peterbe.com>2020-12-08 14:40:17 -0500
committerPeter Bengtsson <mail@peterbe.com>2020-12-08 14:40:17 -0500
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+---
+title: DOMTokenList.replace()
+slug: Web/API/DOMTokenList/replace
+translation_of: Web/API/DOMTokenList/replace
+---
+<p>{{APIRef("DOM")}}</p>
+
+<p>{{domxref("DOMTokenList")}}接口的 <code><strong>replace()</strong></code> 方法可以将列表中一个已存在的token替换为一个新token。如果第一个参数token在列表中不存在, <code>replace()</code> 立刻返回<code>false</code> ,而不会将新token字符串添加到列表中。</p>
+
+<h2 id="语法">语法</h2>
+
+<pre class="syntaxbox notranslate"><var>tokenList</var>.replace(<var>oldToken</var>, <var>newToken</var>);</pre>
+
+<h3 id="参数">参数</h3>
+
+<dl>
+ <dt><code><var>oldToken</var></code></dt>
+ <dd>{{domxref("DOMString")}}类型,想要替换掉的字符串。</dd>
+ <dt><code><var>newToken</var></code></dt>
+ <dd>{{domxref("DOMString")}}类型,表示要将<code><var>oldToken</var></code>字符串替换成的字符串。</dd>
+</dl>
+
+<h3 id="返回值">返回值</h3>
+
+<p>boolean类型, 如果<code><var>oldToken</var></code>被成功替换,返回 <code>true</code> ,否则返回<code>false</code></p>
+
+<div class="note">
+<p><strong>Note</strong>: In older browsers, <code>replace()</code> returns void.</p>
+</div>
+
+<h2 id="Examples">Examples</h2>
+
+<p>在下面的例子中,我们使用{{domxref("Element.classList")}}方法,将设置在{{htmlelement("span")}} 元素上的class列表检索为<code>DOMTokenList</code> 类型。接着我们替换一个字符串, 并且将新列表写入到 <code>&lt;span&gt;</code> 的内容{{domxref("Node.textContent")}}中。</p>
+
+<p>首先,HTML代码如下:</p>
+
+<pre class="brush: html notranslate">&lt;span class="a b c"&gt;&lt;/span&gt;</pre>
+
+<p>然后是JavaScript:</p>
+
+<pre class="brush: js notranslate">let span = document.querySelector("span");
+let classes = span.classList;
+
+let result = classes.replace("c", "z");
+console.log(result);
+
+if (result) {
+ span.textContent = classes;
+} else {
+ span.textContent = 'token not replaced successfully';
+}</pre>
+
+<p>输出如下:</p>
+
+<p>{{ EmbedLiveSample('Examples', '100%', 60) }}</p>
+
+<h2 id="规范">规范</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-domtokenlist-replace','replace()')}}</td>
+ <td>{{Spec2('DOM WHATWG')}}</td>
+ <td>Initial definition</td>
+ </tr>
+ </tbody>
+</table>
+
+<h2 id="浏览器兼容性">浏览器兼容性</h2>
+
+<div>
+
+
+<p>{{Compat("api.DOMTokenList.replace")}}</p>
+</div>