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+---
+title: URLSearchParams.append()
+slug: Web/API/URLSearchParams/append
+translation_of: Web/API/URLSearchParams/append
+---
+<p>{{ApiRef("URL API")}}{{SeeCompatTable}} </p>
+
+<p><strong>append() </strong>是 {{domxref("URLSearchParams")}} 接口的一个方法。可以插入一个新搜索参数。</p>
+
+<h2 id="语法">语法</h2>
+
+<pre class="syntaxbox">URLSearchParams.append(name, value)</pre>
+
+<h3 id="参数">参数</h3>
+
+<dl>
+ <dt>name</dt>
+ <dd>需要插入搜索参数的键名。</dd>
+ <dt>value </dt>
+ <dd>需要插入搜索参数的值。</dd>
+</dl>
+
+<h3 id="返回">返回</h3>
+
+<p>无</p>
+
+<h2 id="例子">例子</h2>
+
+<pre class="brush: js">let url = new URL('https://example.com?foo=1&amp;bar=2');
+let params = new URLSearchParams(url.search.slice(1));
+
+//添加第二个foo搜索参数。
+params.append('foo', 4);
+//查询字符串变成: 'foo=1&amp;bar=2&amp;foo=4'</pre>
+
+<h2 id="说明">说明</h2>
+
+<table class="standard-table">
+ <thead>
+  <tr>
+   <th scope="col">说明</th>
+   <th scope="col">现状</th>
+   <th scope="col">说明</th>
+  </tr>
+ </thead>
+ <tbody>
+  <tr>
+   <td>{{SpecName('URL', '#dom-urlsearchparams-append', "append()")}}</td>
+   <td>{{Spec2('URL')}}</td>
+   <td>初始定义</td>
+  </tr>
+ </tbody>
+</table>
+
+<h2 id="浏览器兼容性">浏览器兼容性</h2>
+
+<div>{{CompatibilityTable}}</div>
+
+<div id="compat-desktop">
+<table class="compat-table">
+ <tbody>
+  <tr>
+   <th>Feature</th>
+   <th>Chrome</th>
+   <th>Firefox (Gecko)</th>
+   <th>Internet Explorer</th>
+   <th>Opera</th>
+   <th>Safari (WebKit)</th>
+  </tr>
+  <tr>
+   <td>基本支持</td>
+   <td>{{CompatChrome(49.0)}}</td>
+   <td>{{CompatVersionUnknown}}</td>
+   <td>{{CompatNo}}</td>
+   <td>{{CompatVersionUnknown}}</td>
+   <td>{{CompatUnknown}}</td>
+  </tr>
+ </tbody>
+</table>
+</div>
+
+<div id="compat-mobile">
+<table class="compat-table">
+ <tbody>
+  <tr>
+   <th>Feature</th>
+   <th>Android</th>
+   <th>Android Webview</th>
+   <th>Firefox Mobile (Gecko)</th>
+   <th>IE Mobile</th>
+   <th>Opera Mobile</th>
+   <th>Safari Mobile</th>
+   <th>Chrome for Android</th>
+  </tr>
+  <tr>
+   <td>基本支持</td>
+   <td>{{CompatNo}}</td>
+   <td>{{CompatChrome(49.0)}}</td>
+   <td>{{CompatVersionUnknown}}</td>
+   <td>{{CompatNo}}</td>
+   <td>{{CompatVersionUnknown}}</td>
+   <td>{{CompatUnknown}}</td>
+   <td>{{CompatChrome(49.0)}}</td>
+  </tr>
+ </tbody>
+</table>
+</div>
+
+<h2 id="参见">参见</h2>
+
+<ul>
+ <li>其它URL相关的接口: {{domxref("URL")}}, {{domxref("URLUtils")}}.</li>
+ <li><a href="https://developers.google.com/web/updates/2016/01/urlsearchparams?hl=en">谷歌开发者:简单URL与URLSearchParams操纵</a></li>
+</ul>