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+---
+title: Reflect
+slug: Web/JavaScript/Reference/Global_Objects/Reflect
+translation_of: Web/JavaScript/Reference/Global_Objects/Reflect
+---
+<div>{{JSRef}}</div>
+
+<p><strong>Reflect</strong> 是一個內建物件，提供了用於獲取可截取之 JavaScript 操作的方法。這些方法與 <a href="/zh-TW/docs/Web/JavaScript/Reference/Global_Objects/Proxy/handler">proxy handlers</a> 的方法相同。<code>Reflect</code> 不是一個函式物件，因此它是不可建構的。</p>
+
+<h2 id="描述">描述</h2>
+
+<p>Unlike most global objects, <code>Reflect</code> is not a constructor. You can not use it with a <a href="/en-US/docs/Web/JavaScript/Reference/Operators/new"><code>new</code> operator</a> or invoke the <code>Reflect</code> object as a function. All properties and methods of <code>Reflect</code> are static (just like the {{jsxref("Math")}} object).</p>
+
+<h2 id="方法">方法</h2>
+
+<p>The <code>Reflect</code> object provides the following static functions which have the same names as the <a href="/en-US/docs/Web/JavaScript/Reference/Global_Objects/Proxy/handler">proxy handler methods</a>. Some of these methods are the same as corresponding methods on {{jsxref("Object")}}.</p>
+
+<dl>
+ <dt>{{jsxref("Reflect.apply()")}}</dt>
+ <dd>Calls a target function with arguments as specified by the <code>args</code> parameter. See also {{jsxref("Function.prototype.apply()")}}.</dd>
+ <dt>{{jsxref("Reflect.construct()")}}</dt>
+ <dd> The <a href="/en-US/docs/Web/JavaScript/Reference/Operators/new"><code>new</code> operator</a> as a function. Equivalent to calling <code>new target(...args)</code>.</dd>
+ <dt>{{jsxref("Reflect.defineProperty()")}}</dt>
+ <dd>Similar to {{jsxref("Object.defineProperty()")}}. Returns a {{jsxref("Boolean")}}.</dd>
+ <dt>{{jsxref("Reflect.deleteProperty()")}}</dt>
+ <dd>The <a href="/en-US/docs/Web/JavaScript/Reference/Operators/delete"><code>delete</code> operator</a> as a function. Equivalent to calling <code>delete target[name]</code>.</dd>
+ <dt>{{jsxref("Reflect.get()")}}</dt>
+ <dd>A function that returns the value of properties.</dd>
+ <dt>{{jsxref("Reflect.getOwnPropertyDescriptor()")}}</dt>
+ <dd>Similar to {{jsxref("Object.getOwnPropertyDescriptor()")}}. Returns a property descriptor of the given property if it exists on the object,  {{jsxref("undefined")}} otherwise.</dd>
+ <dt>{{jsxref("Reflect.getPrototypeOf()")}}</dt>
+ <dd>Same as {{jsxref("Object.getPrototypeOf()")}}.</dd>
+ <dt>{{jsxref("Reflect.has()")}}</dt>
+ <dd>The <a href="/en-US/docs/Web/JavaScript/Reference/Operators/in"><code>in</code> operator</a> as function. Returns a boolean indicating whether an own or inherited property exists.</dd>
+ <dt>{{jsxref("Reflect.isExtensible()")}}</dt>
+ <dd>Same as {{jsxref("Object.isExtensible()")}}.</dd>
+ <dt>{{jsxref("Reflect.ownKeys()")}}</dt>
+ <dd>Returns an array of the target object's own (not inherited) property keys.</dd>
+ <dt>{{jsxref("Reflect.preventExtensions()")}}</dt>
+ <dd>Similar to {{jsxref("Object.preventExtensions()")}}. Returns a {{jsxref("Boolean")}}.</dd>
+ <dt>{{jsxref("Reflect.set()")}}</dt>
+ <dd>A function that assigns values to properties. Returns a {{jsxref("Boolean")}} that is <code>true</code> if the update was successful.</dd>
+ <dt>{{jsxref("Reflect.setPrototypeOf()")}}</dt>
+ <dd>A function that sets the prototype of an object.</dd>
+</dl>
+
+<h2 id="規範">規範</h2>
+
+<table class="standard-table">
+ <tbody>
+  <tr>
+   <th scope="col">Specification</th>
+   <th scope="col">Status</th>
+   <th scope="col">Comment</th>
+  </tr>
+  <tr>
+   <td>{{SpecName('ES2015', '#sec-reflect-object', 'Reflect')}}</td>
+   <td>{{Spec2('ES2015')}}</td>
+   <td>Initial definition.</td>
+  </tr>
+  <tr>
+   <td>{{SpecName('ESDraft', '#sec-reflect-object', 'Reflect')}}</td>
+   <td>{{Spec2('ESDraft')}}</td>
+   <td>Reflect.enumerate has been removed.</td>
+  </tr>
+ </tbody>
+</table>
+
+<h2 id="瀏覽器相容性">瀏覽器相容性</h2>
+
+<p>{{CompatibilityTable}}</p>
+
+<div id="compat-desktop">
+<table class="compat-table">
+ <tbody>
+  <tr>
+   <th>Feature</th>
+   <th>Chrome</th>
+   <th>Edge</th>
+   <th>Firefox (Gecko)</th>
+   <th>Internet Explorer</th>
+   <th>Opera</th>
+   <th>Safari</th>
+  </tr>
+  <tr>
+   <td>Basic support</td>
+   <td>{{CompatChrome(49.0)}}</td>
+   <td>{{CompatVersionUnknown}}</td>
+   <td>{{CompatGeckoDesktop("42")}}</td>
+   <td>{{CompatNo}}</td>
+   <td>{{CompatNo}}</td>
+   <td>{{CompatSafari(10)}}</td>
+  </tr>
+ </tbody>
+</table>
+</div>
+
+<div id="compat-mobile">
+<table class="compat-table">
+ <tbody>
+  <tr>
+   <th>Feature</th>
+   <th>Android</th>
+   <th>Chrome for Android</th>
+   <th>Edge</th>
+   <th>Firefox Mobile (Gecko)</th>
+   <th>IE Mobile</th>
+   <th>Opera Mobile</th>
+   <th>Safari Mobile</th>
+  </tr>
+  <tr>
+   <td>Basic support</td>
+   <td>{{CompatChrome(49.0)}}</td>
+   <td>{{CompatChrome(49.0)}}</td>
+   <td>{{CompatVersionUnknown}}</td>
+   <td>{{CompatGeckoMobile("42")}}</td>
+   <td>{{CompatNo}}</td>
+   <td>{{CompatNo}}</td>
+   <td>{{CompatSafari(10)}}</td>
+  </tr>
+ </tbody>
+</table>
+</div>
+
+<h2 id="參見">參見</h2>
+
+<ul>
+ <li>The {{jsxref("Proxy")}} global object.</li>
+ <li>The {{jsxref("Proxy.handler", "handler")}} object.</li>
+</ul>