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author | Peter Bengtsson <mail@peterbe.com> | 2020-12-08 14:40:17 -0500 |
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committer | Peter Bengtsson <mail@peterbe.com> | 2020-12-08 14:40:17 -0500 |
commit | 33058f2b292b3a581333bdfb21b8f671898c5060 (patch) | |
tree | 51c3e392513ec574331b2d3f85c394445ea803c6 /files/zh-cn/web/api/domtokenlist/replace/index.html | |
parent | 8b66d724f7caf0157093fb09cfec8fbd0c6ad50a (diff) | |
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diff --git a/files/zh-cn/web/api/domtokenlist/replace/index.html b/files/zh-cn/web/api/domtokenlist/replace/index.html new file mode 100644 index 0000000000..53652d2c10 --- /dev/null +++ b/files/zh-cn/web/api/domtokenlist/replace/index.html @@ -0,0 +1,82 @@ +--- +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><span></code> 的内容{{domxref("Node.textContent")}}中。</p> + +<p>首先,HTML代码如下:</p> + +<pre class="brush: html notranslate"><span class="a b c"></span></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> |