---
title: ServiceWorker
slug: Web/API/ServiceWorker
tags:
  - API
  - Interface
  - Offline
  - Reference
  - Service Workers
  - ServiceWorker
  - Workers
  - 서비스 워커
  - 워커
translation_of: Web/API/ServiceWorker
---
<div>{{APIRef("Service Workers API")}}</div>

<p><a href="/ko/docs/Web/API/Service_Worker_API">Service Worker API</a>의 <strong><code>ServiceWorker</code></strong> 인터페이스는 서비스 워커로의 참조를 제공합니다. 다수의{{glossary("browsing context", "브라우징 맥락")}}(e.g. 페이지, 다른 워커, 등등)는 고유한<code> ServiceWorker</code> 객체를 통해 동일한 서비스 워커와 연결할 수 있습니다.</p>

<p><code>ServiceWorker</code> 객체는 {{domxref("ServiceWorkerRegistration.active")}} 속성과 {{domxref("ServiceWorkerContainer.controller")}} 속성으로 접근할 수 있습니다. <code>controller</code>는 활성화되어 페이지를 통제 중인 서비스 워커입니다.</p>

<p><code>ServiceWorker</code> 인터페이스에서는 일련의 생명주기 이벤트(<code>install</code>, <code>activate</code>)와 기능 이벤트(<code>fetch</code>)가 발생합니다. <code>ServiceWorker</code> 객체의 생명주기는 {{domxref("ServiceWorker.state")}} 속성이 담고 있습니다.</p>

<h2 id="속성">속성</h2>

<p><code>ServiceWorker</code> 인터페이스는 부모 {{domxref("Worker")}}에서 속성을 상속합니다.</p>

<dl>
 <dt>{{domxref("ServiceWorker.scriptURL")}} {{readonlyinline}}</dt>
 <dd>Returns the <code>ServiceWorker</code> serialized script URL defined as part of {{domxref("ServiceWorkerRegistration")}}. The URL must be on the same origin as the document that registers the <code>ServiceWorker</code>.</dd>
 <dt>{{domxref("ServiceWorker.state")}} {{readonlyinline}}</dt>
 <dd>Returns the state of the service worker. It returns one of the following values: <code>installing</code>, <code>installed,</code> <code>activating</code>, <code>activated</code>, or <code>redundant</code>.</dd>
</dl>

<h3 id="이벤트_처리기">이벤트 처리기</h3>

<dl>
 <dt>{{domxref("ServiceWorker.onstatechange")}} {{readonlyinline}}</dt>
 <dd>An {{domxref("EventListener")}} property called whenever an event of type <code>statechange</code> is fired; it is basically fired anytime the {{domxref("ServiceWorker.state")}} changes.</dd>
</dl>

<h2 id="메서드">메서드</h2>

<p><code>ServiceWorker</code> 인터페이스는 부모 {{domxref("Worker")}}에서 메서드를 상속합니다. 단, {{domxref("Worker.terminate()")}}는 예외이며 서비스 워커에서 접근할 수 없습니다.</p>

<h2 id="예제">예제</h2>

<p>This code snippet is from the <a href="https://github.com/GoogleChrome/samples/blob/gh-pages/service-worker/registration-events/index.html">service worker registration-events sample</a> (<a href="https://googlechrome.github.io/samples/service-worker/registration-events/">live demo</a>). The code listens for any change in the {{domxref("ServiceWorker.state")}} and returns its value.</p>

<pre class="brush: js notranslate">if ('serviceWorker' in navigator) {
    navigator.serviceWorker.register('service-worker.js', {
        scope: './'
    }).then(function (registration) {
        var serviceWorker;
        if (registration.installing) {
            serviceWorker = registration.installing;
            document.querySelector('#kind').textContent = 'installing';
        } else if (registration.waiting) {
            serviceWorker = registration.waiting;
            document.querySelector('#kind').textContent = 'waiting';
        } else if (registration.active) {
            serviceWorker = registration.active;
            document.querySelector('#kind').textContent = 'active';
        }
        if (serviceWorker) {
            // logState(serviceWorker.state);
            serviceWorker.addEventListener('statechange', function (e) {
                // logState(e.target.state);
            });
        }
    }).catch (function (error) {
        // Something went wrong during registration. The service-worker.js file
        // might be unavailable or contain a syntax error.
    });
} else {
    // The current browser doesn't support service workers.
}</pre>

<h2 id="명세">명세</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('Service Workers', '#serviceworker', 'ServiceWorker')}}</td>
   <td>{{Spec2('Service Workers')}}</td>
   <td>Initial definition.</td>
  </tr>
 </tbody>
</table>

<h2 id="브라우저_호환성">브라우저 호환성</h2>

<div>


<p>{{Compat("api.ServiceWorker")}}</p>
</div>

<h2 id="같이_보기">같이 보기</h2>

<ul>
 <li><a href="https://serviceworke.rs">ServiceWorker Cookbook</a></li>
 <li><a href="/en-US/docs/Web/API/ServiceWorker_API/Using_Service_Workers">Using Service Workers</a></li>
 <li><a href="https://github.com/mdn/sw-test">Service worker basic code example</a></li>
 <li><a href="https://jakearchibald.github.io/isserviceworkerready/">Is ServiceWorker ready?</a></li>
 <li>{{jsxref("Promise")}}</li>
 <li><a href="/en-US/docs/Web/API/Web_Workers_API/Using_web_workers">Using web workers</a></li>
</ul>