微信网页版弹窗实现

无处不在的弹窗提醒.

<a onclick="showNotification();">show Notification</a>

<script>
function showNotification () {
window.Notification.permission = "granted";
alert(window.Notification.permission);
if (window.Notification){ 
if (window.Notification.permission == "granted") {
var notification = new Notification('标题', {
body: "内容",
icon: "图标路径，若不指定默认为favicon"
});
setTimeout(function(){notification.close();},5000);
} else {
window.Notification.requestPermission();
}    
}else alert('你的浏览器不支持此消息提示功能，请使用chrome内核的浏览器！');
};

</script>

详情见:http://www.zhangxinxu.com/wordpress/2016/07/know-html5-web-notification/