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[英]Argument of function is a property that exists in a type of Typescript
[英]Typescript error - Property 'permission' not exists on type
我有這個JavaScript代碼,用於顯示通知權限的當前狀態:
main.js
var $status = document.getElementById('status');
if ('Notification' in window) {
$status.innerText = Notification.permission;
}
的index.html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>Document</title>
</head>
<body>
<p>Current permission status is
<b id="status">unavailable</b>
</p>
<script src="/scripts/main.js"></script>
</body>
</html>
如果我在打字稿文件中寫入相同的代碼,則會出現此錯誤:
main.ts
var $status = document.getElementById('status');
if ('Notification' in window) {
$status.innerText = Notification.permission;
}
ERROR - Notification.permission
MESSAGE - Property 'permission' not exists on type
'new(title: string, options?: NotificationOptions): Notification;
prototype: Notification;
requestPermission(callback?: NotificationPermissionCallback):
Promise<string>;'
如何忽略此錯誤?
嘗試將Notification
強制轉換為any
類型,以避免編譯器錯誤。
if ('Notification' in window) {
$status.innerText = (Notification as any).permission;
}
另一個選項是包括Notification
類型的定義。
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