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This is an experimental technology
Check the Browser compatibility table carefully before using this in production.

ServiceWorkerRegistration 인터페이스의 installing 속성은 ServiceWorker.state 가 installing 인 서비스 워커를 반환한다. 이 속성은 null 로 초기 설정되어 있다.

Note: 이 기능은 Web Workers 에서 사용 가능하다.


sw = ServiceWorker.installing 


현재 installing 상태에 있다면, ServiceWorker 객체


Specification Status Comment
Service Workers
The definition of 'ServiceWorkerRegistration.installing' in that specification.
Working Draft Initial definition.

Browser compatibility

Update compatibility data on GitHub
ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidFirefox for AndroidOpera for AndroidSafari on iOSSamsung Internet
Chrome Full support 40Edge Full support 17
Full support 17
Full support 16
Disabled From version 16: this feature is behind the Enable service workers preference.
Firefox Full support 44
Full support 44
Notes Extended Support Releases (ESR) before Firefox 78 ESR do not support service workers and the Push API.
IE No support NoOpera Full support 27Safari Full support 11.1WebView Android Full support 40Chrome Android Full support 40Firefox Android Full support 44Opera Android Full support 27Safari iOS Full support 11.3Samsung Internet Android Full support 4.0


Full support  
Full support
No support  
No support
Experimental. Expect behavior to change in the future.
Experimental. Expect behavior to change in the future.
See implementation notes.
See implementation notes.
User must explicitly enable this feature.
User must explicitly enable this feature.

See also