Html Webkit 通知 requestPermission 功能不起作用
声明：本页面是StackOverFlow热门问题的中英对照翻译，遵循CC BY-SA 4.0协议，如果您需要使用它，必须同样遵循CC BY-SA许可，注明原文地址和作者信息，同时你必须将它归于原作者（不是我）：StackOverFlow
原文地址: http://stackoverflow.com/questions/5040107/
Warning: these are provided under cc-by-sa 4.0 license. You are free to use/share it, But you must attribute it to the original authors (not me):
StackOverFlow
Webkit notifications requestPermission function doesn't work
提问by Alexey Blinov
I am trying to implement support for WebKit's native desktop notifications on my site. When I try to ask for user's permission to use the notifications, absolutely nothing happens. For example, the following HTML does not prompt Chrome to ask me for permission:
我正在尝试在我的网站上实现对 WebKit 的本机桌面通知的支持。当我尝试请求用户许可使用通知时，绝对没有任何反应。例如，以下 HTML 不会提示 Chrome 请求我的许可：
<html lang="en">
<head></head>
<body>
<h1>Testing</h1>
<script>
window.webkitNotifications.requestPermission();
</script>
</body>
</html>
I know that there is no problem with my version of Chrome because other sites (e.g. http://www.html5rocks.com/tutorials/notifications/quick/) work perfectly fine: I can see both the prompt and the subsequent notifications.
我知道我的 Chrome 版本没有问题，因为其他网站（例如http://www.html5rocks.com/tutorials/notifications/quick/）工作得很好：我可以看到提示和后续通知。
回答by Tom Tu
Check the specification at chromium api docs. You can call it only as a feedback to user gesture/action - mouse click etc.
检查chromium api docs 中的规范。您只能将其称为对用户手势/动作的反馈 - 鼠标单击等。
requestPermission Requests that the user agent ask the user for permission to show notifications from scripts. This method should only be called while handling a user gesture; in other circumstances it will have no effect. This method is asynchronous. The function provided in callback will be invoked when the user has responded to the permission request. If the current permission level is PERMISSION_DENIED, the user agent may take no action in response to requestPermission.
requestPermission 请求用户代理请求用户允许显示来自脚本的通知。 这个方法应该只在处理用户手势时调用；在其他情况下，它不会产生任何影响。此方法是异步的。当用户响应权限请求时，将调用回调中提供的函数。如果当前权限级别为 PERMISSION_DENIED，则用户代理可能不会响应 requestPermission 采取任何行动。
UPDATE 2014-10-01: In Chrome 37, the user gesture requirement was removed. It should now be possible to request permission to display notifications at any moment. If you wish to target older versions of Chrome as well (eg. in a corporate environment), you'll probably need to continue relying on user gesture events.
更新 2014-10-01：在 Chrome 37 中，删除了用户手势要求。现在应该可以随时请求显示通知的权限。如果您还希望针对旧版本的 Chrome（例如，在公司环境中），您可能需要继续依赖用户手势事件。
回答by Zaheer
For checking Notification on local file (file://) permission will popup but notification wont work on chrome.
对于检查本地文件（file://）权限的通知将弹出，但通知在 chrome 上不起作用。
As a work around you can change
作为一种解决方法，你可以改变
Content setting > Notification > Allow All websites to show notification
内容设置 > 通知 > 允许所有网站显示通知
Shortest code to show notification
显示通知的最短代码
var notification = new Notification("YOUR MESSAGE");
