https://kelly-chui.github.io/tags/event/Recent content in Event on Kelly DevHugoen-usMon, 09 Jun 2025 00:00:00 +0000https://kelly-chui.github.io/posts/javascript-basics-07-errors-and-events/Mon, 09 Jun 2025 00:00:00 +0000https://kelly-chui.github.io/posts/javascript-basics-07-errors-and-events/<h2 id="예외-처리">예외 처리</h2> <ul> <li>예외 → 실행에 문제가 발생하면 자동 중단됨</li> <li>예외 처리 → 오류에 대처할 수 있게 하는 것</li> </ul> <h3 id="예외와-기본-예외-처리">예외와 기본 예외 처리</h3> <ul> <li>TypeError 기본 예외 처리 <ul> <li>사전에 해당 데이터가 <code>undefined</code>인지 조건문으로 확인</li> </ul> </li> </ul> <h3 id="고급-예외-처리">고급 예외 처리</h3> <ul> <li><code>try</code>, <code>catch</code>, <code>finally</code> 구문</li> </ul> <div class="code-theme-github"><div class="highlight"><pre tabindex="0" class="chroma"><code class="language-jsx" data-lang="jsx"><span class="line"><span class="cl"><span class="k">try</span> <span class="p">{</span> </span></span><span class="line"><span class="cl"> <span class="c1">// 예외 발생 </span></span></span><span class="line"><span class="cl"><span class="p">}</span> <span class="k">catch</span> <span class="p">(</span><span class="nx">exception</span><span class="p">)</span> <span class="p">{</span> </span></span><span class="line"><span class="cl"> <span class="c1">// 예외 처리 </span></span></span><span class="line"><span class="cl"><span class="p">}</span> <span class="k">finally</span> <span class="p">{</span> </span></span><span class="line"><span class="cl"> <span class="c1">// 무조건 실행 </span></span></span><span class="line"><span class="cl"><span class="p">}</span></span></span></code></pre></div></div> <p><code>catch</code>구문, <code>finally</code>구문 생략 가능</p> <h3 id="예외-객체">예외 객체</h3> <p>예외가 발생하면 어떤 예외가 발생했는지 정보를 전달함, <code>catch</code> 구문의 괄호 안의 변수</p>