Notification：permission 靜態屬性
注意：此功能在 Web Workers 中可用。
Notification 介面中只讀的 permission 靜態屬性指示當前使用者為當前源授予的用於顯示 Web 通知的狀態。
值
一個表示當前許可權的字串。該值可以是：
示例
如果您想在傳送通知之前，先檢查是否支援通知，然後檢查當前源是否已授予傳送通知的許可權，如果需要則請求許可權，可以使用以下程式碼片段。
js
function notifyMe() {
if (!("Notification" in window)) {
// Check if the browser supports notifications
alert("This browser does not support desktop notification");
} else if (Notification.permission === "granted") {
// Check whether notification permissions have already been granted;
// if so, create a notification
const notification = new Notification("Hi there!");
// …
} else if (Notification.permission !== "denied") {
// We need to ask the user for permission
Notification.requestPermission().then((permission) => {
// If the user accepts, let's create a notification
if (permission === "granted") {
const 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 anymore.
}
規範
| 規範 |
|---|
| Notifications API # dom-notification-permission |
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