在此页

• 句法
• 范例
• 规范
• 浏览器兼容性
• 相关话题

弃用
This feature is no longer recommended. Though some browsers might still support it, it may have already been removed from the relevant web standards, may be in the process of being dropped, or may only be kept for compatibility purposes. Avoid using it, and update existing code if possible; see the 兼容性表格 at the bottom of this page to guide your decision. Be aware that this feature may cease to work at any time.

PushManager.hasPermission() 方法在 PushManager interface returns a Promise that resolves to the PushPermissionStatus of the requesting webapp, which will be one of granted , denied ，或 default .

句法

​PushManager.hasPermission().then(function(pushPermissionStatus) { ... } );
					

范例

// TBD
					

规范

规范	状态	注释
Push API	工作草案	定义 PushManager 接口。

浏览器兼容性

The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request. 更新 GitHub 上的兼容性数据

	桌面						移动
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet
hasPermission	Chrome 42	Edge 16 Disabled 16 Disabled Disabled From version 16: this feature is behind the Enable service workers preference. 17	Firefox 44 44 注意事项 注意事项 Extended Support Releases (ESR) before Firefox 78 ESR do not support service workers and the Push API.	IE 不支持 No	Opera 29	Safari 不支持 No	WebView Android 不支持 No	Chrome Android 42	Firefox Android 48 48 注意事项 注意事项 Push enabled by default.	Opera Android 29	Safari iOS 不支持 No	Samsung Internet Android 4.0

图例

完整支持

完整支持

不支持

不支持

实验。期望将来行为有所改变。

实验。期望将来行为有所改变。

见实现注意事项。

见实现注意事项。

用户必须明确启用此特征。

用户必须明确启用此特征。

元数据

• 最后修改： 2019 年 3 月 23 日

相关话题

1. Push API
2. PushManager
3. 特性

   1. supportedContentEncodings
4. 方法

   1. getSubscription()
   2. hasPermission()
   3. permissionState()
   4. register()
   5. registrations()
   6. subscribe()
   7. unregister()
5. Related pages for Push API

   1. PushEvent
   2. PushMessageData
   3. PushSubscription
   4. ServiceWorkerGlobalScope.onpush
   5. ServiceWorkerGlobalScope.onpushsubscriptionchange
   6. ServiceWorkerRegistration.pushManager