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+---
+title: 管道操作符
+slug: Web/JavaScript/Reference/Operators/管道操作符
+tags:
+  - Experimental
+  - JavaScript
+  - Operator
+  - 语法糖
+  - 链式
+  - 链式调用
+translation_of: Web/JavaScript/Reference/Operators/Pipeline_operator
+---
+<div>{{jsSidebar("Operators")}} {{SeeCompatTable}}</div>
+
+<p>试验性的管道操作符 <code>|&gt;</code> （目前其标准化流程处于 stage 1 阶段）允许以一种易读的方式去对函数链式调用。本质上来说，管道操作符是单参数函数调用的语法糖，它允许你像这样执行一个调用：</p>
+
+<pre class="brush: js">let url = "%21" |&gt; decodeURI;</pre>
+
+<p>使用传统语法写的话，等效的代码是这样的：</p>
+
+<pre class="brush: js">let url = decodeURI("%21");
+</pre>
+
+<h2 id="语法">语法</h2>
+
+<pre class="syntaxbox">expression |&gt; function</pre>
+
+<h2 id="例子">例子</h2>
+
+<h3 id="函数链式调用">函数链式调用</h3>
+
+<p>当链式调用多个函数时，使用管道操作符可以改善代码的可读性。</p>
+
+<pre class="brush: js">const double = (n) =&gt; n * 2;
+const increment = (n) =&gt; n + 1;
+
+// 没有用管道操作符
+double(increment(double(5))); // 22
+
+// 用上管道操作符之后
+5 |&gt; double |&gt; increment |&gt; double; // 22
+</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">备注</th>
+  </tr>
+ </thead>
+ <tbody>
+  <tr>
+   <td><a href="http://tc39.github.io/proposal-pipeline-operator/">Pipeline operator draft</a></td>
+   <td>Stage 1</td>
+   <td>Not part of the ECMAScript specification yet.</td>
+  </tr>
+ </tbody>
+</table>
+
+<h2 id="浏览器兼容性Edit">浏览器兼容性<a class="button section-edit only-icon" href="https://developer.mozilla.org/zh-CN/docs/Web/JavaScript/Reference/Operators/Bitwise_Operators$edit#浏览器兼容性" rel="nofollow, noindex"><span>Edit</span></a></h2>
+
+<div>
+
+
+<p>{{Compat("javascript.operators.pipeline")}}</p>
+</div>
+
+<h2 id="参见">参见</h2>
+
+<ul>
+ <li>GitHub 上的 <a href="https://github.com/tc39/proposals">TC39/proposals</a></li>
+</ul>