ServiceWorkerContainer.controller

Baseline Widely available

This feature is well established and works across many devices and browser versions. It’s been available across browsers since April 2018.

实验性: 这是一项实验性技术
在将其用于生产之前,请仔细检查浏览器兼容性表格

当状态为activated 时, ServiceWorkerContainer 接口的只读属性 controller 返回一个 ServiceWorker 对象(与 ServiceWorkerRegistration.active 返回的对象是同一个)。当页面强制刷新 (Shift + refresh) 或不存在 active worder 时,该属性返回 null

语法

var myController = navigator.serviceWorker.controller;

一个ServiceWorker对象。

示例

js
if ("serviceWorker" in navigator) {
  // Do a one-off check to see if a service worker's in control.
  if (navigator.serviceWorker.controller) {
    console.log(
      "This page is currently controlled by:",
      navigator.serviceWorker.controller,
    );
  } else {
    console.log(
      "This page is not currently controlled " + "by a service worker.",
    );
  }
} else {
  console.log("Service workers are not supported.");
}

规范

Specification
Service Workers
# navigator-service-worker-controller

浏览器兼容性

Report problems with this compatibility data on GitHub
desktopmobile
Chrome
Edge
Firefox
Opera
Safari
Chrome Android
Firefox for Android
Opera Android
Safari on iOS
Samsung Internet
WebView Android
WebView on iOS
controller

Legend

Tip: you can click/tap on a cell for more information.

Full support
Full support
No support
No support