PushManager.subscribe()

PushManager  的 subscribe() 方法订阅了一个推送服务。

返回一个 Promise，包含推送订阅详情的 PushSubscription 对象。如果当前 service worker 不存在订阅时会创建一个新的推送订阅。

语法

​PushManager.subscribe(options).then(function(pushSubscription) { ... } );

参数

options 可选

一个包含可选配置参数的对象。拥有以下属性：

• userVisibleOnly: 布尔值，表示返回的推送订阅将只被用于对用户可见的消息。

返回值

返回 PushSubscription 对象的 Promise。

示例

this.onpush = function(event) {
  console.log(event.data);
  // From here we can write the data to IndexedDB, send it to any open
  // windows, display a notification, etc.
}

navigator.serviceWorker.register('serviceworker.js').then(
  function(serviceWorkerRegistration) {
    serviceWorkerRegistration.pushManager.subscribe().then(
      function(pushSubscription) {
        console.log(pushSubscription.endpoint);
        // The push subscription details needed by the application
        // server are now available, and can be sent to it using,
        // for example, an XMLHttpRequest.
      }, function(error) {
        // During development it often helps to log errors to the
        // console. In a production environment it might make sense to
        // also report information about errors back to the
        // application server.
        console.log(error);
      }
    );
  });

规范

浏览器兼容性

• [1] Push (and Service Workers) have been disabled in the Firefox 45 Extended Support Release (ESR.)
• [2] Push has been enabled by default on Firefox for Android version 48.

另见

• 使用 Push API