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---
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>
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