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+---
+title: URLSearchParams.has()
+slug: Web/API/URLSearchParams/has
+translation_of: Web/API/URLSearchParams/has
+---
+<p>{{ApiRef("URL API")}}{{SeeCompatTable}} </p>
+
+<p>{{domxref("URLSearchParams")}} 的<strong>has() </strong>方法返回一个 {{jsxref("Boolean")}} 表示一个指定的键名对应的值是否存在。</p>
+
+<h2 id="语法">语法</h2>
+
+<pre class="syntaxbox">var <em>hasName</em> = URLSearchParams.has(<em>name</em>)</pre>
+
+<h3 id="参数">参数</h3>
+
+<dl>
+ <dt>键名</dt>
+ <dd>要查找的参数的键名。</dd>
+</dl>
+
+<h3 id="返回值">返回值</h3>
+
+<p>一个 {{jsxref("Boolean")}}.</p>
+
+<h2 id="示例">示例</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));
+
+params.has('bar') === true; //true
+</pre>
+
+<h2 id="规范">规范</h2>
+
+<table class="standard-table">
+ <thead>
+  <tr>
+   <th scope="col">规范</th>
+   <th scope="col">状态</th>
+   <th scope="col">说明</th>
+  </tr>
+ </thead>
+ <tbody>
+  <tr>
+   <td>{{SpecName('URL', '#dom-urlsearchparams-has', "has()")}}</td>
+   <td>{{Spec2('URL')}}</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.URLSearchParams.has")}}</p>
+</div>