html5桌面通知(Web Notifications)实例解析

html5桌面通知(web notifications)对于需要实现在新消息入线时，有桌面通知效果的情况下非常有用，在此简单介绍一下这个html5的新属性。

这里有个不错的demo：html5 web notification demo

从上面这个demo中 我们就可以获取所需要的基本核心代码，如下：

复制代码 代码如下: <script>

var notification = window.notification || window.moznotification || window.webkitnotification;

notification.requestpermission(function (permission) {

// console.log(permission);

});

function show() {

var instance = new notification(

“test title”, {

body: ” test message”

}

);

instance.onclick = function () {

// something to do

};

instance.onerror = function () {

// something to do

};

instance.onshow = function () {

// something to do

};

instance.onclo = function () {

// something to do

};

return fal;

}

</script>



其中：
notification.requestpermission 这句代码的功能就是向用户请求权限允许。

通过以上的例子，基本思路我们已经有了，首先加载文档时，就向用户请求权限，获取权限后以后都so easy了。

复制代码 代码如下: window.addeventlistener(‘load’, function () {

// at first, let’s check if we have permission for notification

if (notification && notification.permission !== “granted”) {

notifica面部过敏怎么办tion.requestpermission(function (status) {

if (notification.permission !== status) {

notification.permission = status;

}

});

}

});

火狐下 验证是通过的，但是在chrome下总是出不来，后来发现这样一段话

复制代码 代码如下: not a bug, feature.

desktop notifications can only be triggered via a ur adavy crockettction. typing into the

javascript console has the same effect as raw javascript code embedded into the web

page (no ur action). typing the javascript into the location bar, however,

reprents a ur-action (the ur is intentionally visiting a javascript link to

enable notifications, probably for sites that tend to u href=”javascript：” instead

of onclick=””.

i’m pretty sure this is a non-issue.

原来在chrome下是必须要用户手动触发的，否则，chrome浏览器会无视这段的js

但是在我们网站里肯定不可能加一个按钮或者超链接来显式的让用户授权吧，好吧， 实际上这也不是个事情，我们可以在用户经常点的按钮上顺便处理下这个授权就好，在chrome下是一次授权终身有用。除非你进入设置把广东高考总分多少他禁了。

整合一下，代码如下：

复制代码 代码如下: function showmsgnotification(title, msg){

var notification = window.notification || window.moznotification || window.webkitnotification;

if (notification && notification.permission === “granted”) {

var instance = new notification(

title, {

body: msg,

icon: “image_url”

}

);

instance.onclick = function () {

// something to do

};

instance.onerror = function () {

// so二年级上册计算题mething to do

};

instance.onshow = function () {

// something to do

// console.log(instance.clo);

ttimeout(instance.clo, 3000);

};

instance.onclo = function () {

// something to do

};

}el if (notification && notification.permission !== “denied”) {

notification.requestpermission(function (status) {

if (notification.permission !== status) {

notification.permission = status;

}

// if the ur said okay

if (status === “granted”) {

var instance = new notification(

title, {

body: msg,

icon: “image_url”

}

);

instance.onclick = function () {

// something to do

};

instance.onerror = function () {

// something to do

};

instance.onshow = function () {

// something to do

ttimeout(instance.clo, 3000);

};

instance.on边城读书笔记clo = function () {

// something to do

};

}el {

return fal

}

});

}el{

return fal;

}

}