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---
title: Object.prototype.__defineGetter__()
slug: Web/JavaScript/Reference/Global_Objects/Object/__defineGetter__
translation_of: Web/JavaScript/Reference/Global_Objects/Object/__defineGetter__
---
<div>{{JSRef}}</div>
<div class="warning">
<p>이 기능은 object initializer 문법 혹은 {{jsxref("Object.defineProperty()")}} API를 사용한 getter 정의가 표준화됨으로써 비표준화되었습니다.<br>
이 기능은 이제까지의 ECMAScript 사양에서만 사용되고 있습니다.<br>
보다 좋은 방법이 있으므로, 이 메소드는 사용하지 말아야합니다.</p>
</div>
<p><code><strong>__defineGetter__</strong></code> 메소드는 오브젝트의 프로퍼티와 함수를 바인드합니다.<br>
프로퍼티의 값이 조회될 때 바인드된 함수가 호출됩니다.</p>
<h2 id="문법">문법</h2>
<pre class="syntaxbox"><var>obj</var>.__defineGetter__(<var>prop</var>, <var>func</var>)</pre>
<h3 id="인자">인자</h3>
<dl>
<dt><code>prop</code></dt>
<dd>함수와 바인드된 프로퍼티의 이름을 나타내는 문자열</dd>
<dt><code>func</code></dt>
<dd>프로퍼티 값이 조회되었을 때 호출되는 함수</dd>
</dl>
<h3 id="리턴_값">리턴 값</h3>
<p>{{jsxref("undefined")}}.</p>
<h2 id="Description">Description</h2>
<p><code>__defineGetter__</code> 를 사용하여 기존 오브젝트의 {{jsxref("Operators/get", "getter", "", 1)}}를 사용할 수 있습니다.</p>
<h2 id="Examples">Examples</h2>
<pre class="brush: js">// Non-standard and deprecated way
var o = {};
o.__defineGetter__('gimmeFive', function() { return 5; });
console.log(o.gimmeFive); // 5
// Standard-compliant ways
// Using the get operator
var o = { get gimmeFive() { return 5; } };
console.log(o.gimmeFive); // 5
// Using Object.defineProperty
var o = {};
Object.defineProperty(o, 'gimmeFive', {
get: function() {
return 5;
}
});
console.log(o.gimmeFive); // 5
</pre>
<h2 id="Specifications">Specifications</h2>
<table class="spectable standard-table">
<tbody>
<tr>
<th scope="col">Specification</th>
<th scope="col">Status</th>
<th scope="col">Comment</th>
</tr>
<tr>
<td>{{SpecName('ESDraft', '#sec-object.prototype.__defineGetter__', 'Object.prototype.__defineGetter__()')}}</td>
<td>{{Spec2('ESDraft')}}</td>
<td>Included in the (normative) annex for additional ECMAScript legacy features for Web browsers (note that the specification codifies what is already in implementations).</td>
</tr>
</tbody>
</table>
<h2 id="Browser_compatibility">Browser compatibility</h2>
<div>
<p>{{Compat("javascript.builtins.Object.defineGetter")}}</p>
</div>
<h2 id="See_also">See also</h2>
<ul>
<li>{{jsxref("Object.prototype.__defineSetter__()")}}</li>
<li>{{jsxref("Operators/get", "get")}} operator</li>
<li>{{jsxref("Object.defineProperty()")}}</li>
<li>{{jsxref("Object.prototype.__lookupGetter__()")}}</li>
<li>{{jsxref("Object.prototype.__lookupSetter__()")}}</li>
<li><a href="/en-US/docs/Web/JavaScript/Guide/Working_with_Objects#Defining_getters_and_setters">JS Guide: Defining Getters and Setters</a></li>
<li><a href="https://whereswalden.com/2010/04/16/more-spidermonkey-changes-ancient-esoteric-very-rarely-used-syntax-for-creating-getters-and-setters-is-being-removed/">[Blog Post] Deprecation of __defineGetter__ and __defineSetter__</a></li>
<li>{{bug(647423)}}</li>
</ul>
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