From da78a9e329e272dedb2400b79a3bdeebff387d47 Mon Sep 17 00:00:00 2001
From: Peter Bengtsson <mail@peterbe.com>
Date: Tue, 8 Dec 2020 14:42:17 -0500
Subject: initial commit

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+---
+title: 'SyntaxError: "x" is a reserved identifier'
+slug: Web/JavaScript/Reference/Errors/Reserved_identifier
+tags:
+  - 구문 에러
+  - 예약어
+  - 자바스크립트
+translation_of: Web/JavaScript/Reference/Errors/Reserved_identifier
+---
+<div>{{jsSidebar("Errors")}}</div>
+
+<h2 id="메세지">메세지</h2>
+
+<pre class="syntaxbox">SyntaxError: The use of a future reserved word for an identifier is invalid (Edge)
+SyntaxError: "x" is a reserved identifier (Firefox)
+SyntaxError: Unexpected reserved word (Chrome)</pre>
+
+<h2 id="에러_타입">에러 타입</h2>
+
+<p>{{jsxref("SyntaxError")}}</p>
+
+<h2 id="무엇이_잘못되었을까">무엇이 잘못되었을까?</h2>
+
+<p><a href="/en-US/docs/Web/JavaScript/Reference/Lexical_grammar#Keywords">예약어</a>가 식별자로 쓰인 경우 발생하는 에러입니다. 이 키워드는 엄격(Strict) 모드와 느슨한(Sloppy) 모드에서 모두 예약어로 취급됩니다.</p>
+
+<ul>
+ <li><code>enum</code></li>
+</ul>
+
+<p>다음은 엄격 모드의 코드에서만 예약어로 취급됩니다:</p>
+
+<ul class="threecolumns">
+ <li><code>implements</code></li>
+ <li><code>interface</code></li>
+ <li>{{jsxref("Statements/let", "let")}}</li>
+ <li><code>package</code></li>
+ <li><code>private</code></li>
+ <li><code>protected</code></li>
+ <li><code>public</code></li>
+ <li><code>static</code></li>
+</ul>
+
+<h2 id="예제">예제</h2>
+
+<h3 id="엄격_모드와_엄격하지_않은_모드에서의_예약어">엄격 모드와 엄격하지 않은 모드에서의 예약어</h3>
+
+<p><code>enum</code> 식별자는 일반적으로 예약되어 있습니다.</p>
+
+<pre class="brush: js example-bad">var enum = { RED: 0, GREEN: 1, BLUE: 2 };
+// SyntaxError: enum is a reserved identifier
+</pre>
+
+<p>엄격 모드의 코드에선 더 많은 식별자들이 예약되어 있습니다.</p>
+
+<pre class="brush: js example-bad">"use strict";
+var package = ["potatoes", "rice", "fries"];
+// SyntaxError: package is a reserved identifier
+</pre>
+
+<p>이 변수들의 이름을 변경해야 합니다.</p>
+
+<pre class="brush: js example-good">var colorEnum = { RED: 0, GREEN: 1, BLUE: 2 };
+var list = ["potatoes", "rice", "fries"];</pre>
+
+<h3 id="오래된_브라우저의_업데이트">오래된 브라우저의 업데이트</h3>
+
+<p>새로운 구문을 사용하기 위해서는 최근 버전의 브라우저로 업데이트 해야 합니다. 예를 들어, 오래된 브라우저를 사용하고 있다면 <code><a href="/en-US/docs/Web/JavaScript/Reference/Statements/let">let</a></code> 또는 <code><a href="/en-US/docs/Web/JavaScript/Reference/Statements/class">class</a></code> 구현할 수 없습니다.</p>
+
+<pre class="brush: js">"use strict";
+class DocArchiver {}
+
+// SyntaxError: class is a reserved identifier
+// (오래된 버전의 브라우저에서만 에러가 발생합니다. 예) Firefox 44 이하)
+</pre>
+
+<h2 id="같이_보기">같이 보기</h2>
+
+<ul>
+ <li><a href="http://wiki.c2.com/?GoodVariableNames">Good variable names</a></li>
+</ul>
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