这篇翻译不完整。请帮忙从英语翻译这篇文章。
Notification 的只读属性 permission 用来表明用户是否允许当前域显示Web Notification.
Note: 此特性在 Web Worker 中可用。
Syntax
var permission = Notification.permission;
Value
permission 的类型为 DOMString
. 该属性的可能值为:
granted
: 用户已经明确的授予了显示通知的权限。.denied
: 用户已经明确的拒绝了显示通知的权限。default
: 用户还未被询问是否授权; 这种情况下权限将视为denied
.
Examples
下面的代码片段详细的说明了,当你首次检查浏览器是否支持Notification,然后检查当前域是否被授予了发送Notification的权限,并且在发送一个通知前进行请求的用法.
function notifyMe() { // Let's check if the browser supports notifications if (!("Notification" in window)) { console.log("This browser does not support desktop notification"); } // Let's check whether notification permissions have alredy been granted else if (Notification.permission === "granted") { // If it's okay let's create a notification var notification = new Notification("Hi there!"); } // Otherwise, we need to ask the user for permission else if (Notification.permission !== 'denied' || Notification.permission === "default") { Notification.requestPermission(function (permission) { // If the user accepts, let's create a notification if (permission === "granted") { var notification = new Notification("Hi there!"); } }); } // At last, if the user has denied notifications, and you // want to be respectful there is no need to bother them any more. }
Specifications
Specification | Status | Comment |
---|---|---|
Notifications API permission |
Living Standard | Living standard |
Browser compatibility
We're converting our compatibility data into a machine-readable JSON format. This compatibility table still uses the old format, because we haven't yet converted the data it contains. Find out how you can help!
Feature | Chrome | Edge | Firefox (Gecko) | Internet Explorer | Opera | Safari |
---|---|---|---|---|---|---|
Basic support | 5 webkit (see notes) 22 |
(Yes) | 4.0 moz (see notes) 22 |
未实现 | 25 | 6 (see notes) |
Available in workers | ? | ? | 41.0 (41.0) | ? | ? | ? |
Feature | Android | Android Webview | Edge | Firefox Mobile (Gecko) | Firefox OS | IE Mobile | Opera Mobile | Safari Mobile | Chrome for Android |
---|---|---|---|---|---|---|---|---|---|
Basic support | ? |
(Yes) |
(Yes) | 4.0 moz (see notes) 22 |
1.0.1 moz (see notes) 1.2 |
未实现 | ? | 未实现 |
(Yes) |
Available in workers | ? | ? | ? | 41.0 (41.0) | ? | ? | ? | ? | ? |