---
title: Function.prototype
slug: conflicting/Web/JavaScript/Reference/Global_Objects/Function
translation_of: Web/JavaScript/Reference/Global_Objects/Function
translation_of_original: Web/JavaScript/Reference/Global_Objects/Function/prototype
original_slug: Web/JavaScript/Reference/Global_Objects/Function/prototype
---
<div>{{JSRef}}</div>

<p><code><strong>Function.prototype</strong></code> 屬性表示 {{jsxref("Function")}} 的原型物件。</p>

<h2 id="描述">描述</h2>

<p>{{jsxref("Function")}} objects inherit from <code>Function.prototype</code>.  <code>Function.prototype</code> cannot be modified.</p>

<h2 id="屬性">屬性</h2>

<dl>
 <dt>{{jsxref("Function.arguments")}} {{deprecated_inline}}</dt>
 <dd>An array corresponding to the arguments passed to a function. This is deprecated as property of {{jsxref("Function")}}, use the {{jsxref("Functions/arguments", "arguments")}} object available within the function instead.</dd>
 <dt><s class="obsoleteElement">{{jsxref("Function.arity")}} {{obsolete_inline}}</s></dt>
 <dd><s class="obsoleteElement">Used to specifiy the number of arguments expected by the function, but has been removed. Use the {{jsxref("Function.length", "length")}} property instead.</s></dd>
 <dt>{{jsxref("Function.caller")}} {{non-standard_inline}}</dt>
 <dd>Specifies the function that invoked the currently executing function.</dd>
 <dt>{{jsxref("Function.length")}}</dt>
 <dd>Specifies the number of arguments expected by the function.</dd>
 <dt>{{jsxref("Function.name")}}</dt>
 <dd>The name of the function.</dd>
 <dt>{{jsxref("Function.displayName")}} {{non-standard_inline}}</dt>
 <dd>The display name of the function.</dd>
 <dt><code>Function.prototype.constructor</code></dt>
 <dd>Specifies the function that creates an object's prototype. See {{jsxref("Object.prototype.constructor")}} for more details.</dd>
</dl>

<h2 id="方法">方法</h2>

<dl>
 <dt>{{jsxref("Function.prototype.apply()")}}</dt>
 <dd>Calls a function and sets its <em>this</em> to the provided value, arguments can be passed as an {{jsxref("Array")}} object.</dd>
 <dt>{{jsxref("Function.prototype.bind()")}}</dt>
 <dd>Creates a new function which, when called, has its <em>this</em> set to the provided value, with a given sequence of arguments preceding any provided when the new function was called.</dd>
 <dt>{{jsxref("Function.prototype.call()")}}</dt>
 <dd>Calls (executes) a function and sets its <em>this</em> to the provided value, arguments can be passed as they are.</dd>
 <dt>{{jsxref("Function.prototype.isGenerator()")}} {{non-standard_inline}}</dt>
 <dd>Returns <code>true</code> if the function is a <a href="/en-US/docs/Web/JavaScript/Guide/Iterators_and_Generators">generator</a>; otherwise returns <code>false</code>.</dd>
 <dt>{{jsxref("Function.prototype.toSource()")}} {{non-standard_inline}}</dt>
 <dd>Returns a string representing the source code of the function. Overrides the {{jsxref("Object.prototype.toSource")}} method.</dd>
 <dt>{{jsxref("Function.prototype.toString()")}}</dt>
 <dd>Returns a string representing the source code of the function. Overrides the {{jsxref("Object.prototype.toString")}} method.</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('ES1')}}</td>
   <td>{{Spec2('ES1')}}</td>
   <td>Initial definition. Implemented in JavaScript 1.1</td>
  </tr>
  <tr>
   <td>{{SpecName('ES5.1', '#sec-15.3.5.2', 'Function.prototype')}}</td>
   <td>{{Spec2('ES5.1')}}</td>
   <td> </td>
  </tr>
  <tr>
   <td>{{SpecName('ES6', '#sec-function-instances-prototype', 'Function.prototype')}}</td>
   <td>{{Spec2('ES6')}}</td>
   <td> </td>
  </tr>
  <tr>
   <td>{{SpecName('ESDraft', '#sec-function-instances-prototype', 'Function.prototype')}}</td>
   <td>{{Spec2('ESDraft')}}</td>
   <td> </td>
  </tr>
 </tbody>
</table>

<h2 id="瀏覽器相容性">瀏覽器相容性</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</th>
  </tr>
  <tr>
   <td>Basic support</td>
   <td>{{CompatVersionUnknown}}</td>
   <td>{{CompatVersionUnknown}}</td>
   <td>{{CompatVersionUnknown}}</td>
   <td>{{CompatVersionUnknown}}</td>
   <td>{{CompatVersionUnknown}}</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>Firefox Mobile (Gecko)</th>
   <th>IE Mobile</th>
   <th>Opera Mobile</th>
   <th>Safari Mobile</th>
  </tr>
  <tr>
   <td>Basic support</td>
   <td>{{CompatVersionUnknown}}</td>
   <td>{{CompatVersionUnknown}}</td>
   <td>{{CompatVersionUnknown}}</td>
   <td>{{CompatVersionUnknown}}</td>
   <td>{{CompatVersionUnknown}}</td>
   <td>{{CompatVersionUnknown}}</td>
  </tr>
 </tbody>
</table>
</div>

<h2 id="參見">參見</h2>

<ul>
 <li>{{jsxref("Function")}}</li>
</ul>