HTML5权威指南 16.拖放API与通知API

 1 <!DOCTYPE html>
 2 <html>
 3 
 4     <head>
 5         <meta charset="UTF-8">
 6         <title></title>
 7         <script type="text/javascript">
 8             function init() {
 9                 var source = document.getElementById("dragme");
10                 var dest = document.getElementById("text");
11                 //(1)拖放开始
12                 source.addEventListener("dragstart", function(ev) {
13                     //向dataTransfer 对象追加数据
14                     var dt = ev.dataTransfer;
15                     dt.effectAllowed = "all";
16                     //(2)拖动元素为dt.setData("text/plain",this.id);
17                     dt.setData("text/plain", "你好");
18                 }, false);
19 
20                 //(3)dragend：拖放结束
21                 dest.addEventListener("dragend", function(ev) {
22                     //不执行默认处理（拒绝拖放）
23                     ev.preventDefault();
24                 }, false);
25 
26                 //(4)drop：被拖放
27                 dest.addEventListener("drop", function(ev) {
28                     //从DataTransfer对象那里取得数据
29                     var dt = ev.dataTransfer;
30                     var text = dt.getData("text/plain");
31                     dest.textContent += text;
32                     //(5)不执行默认处理(拒绝被拖放)
33                     ev.preventDefault();
34                     //停止事件传播
35                     ev.stopPropagation();
36                 }, false);
37             }
38             document.ondragover = function(e) { e.preventDefault() };
39             document.ondrop = function(e) { e.preventDefault() };
40         </script>
41     </head>
42 
43     <body onload="init()">
44         <h1> 简单拖放示例</h1>
45         <!--(7)把draggable属性设为true-->
46         <div id="dragme" draggable="true" style=" 200px; border: 1px solid gray;">
47             请拖放
48         </div>
49         <div id="text" style=" 200px; border: 1px solid gray;"></div>
50 
51     </body>
52 
53 </html>

 1 <!DOCTYPE html>
 2 <html>
 3 
 4     <head>
 5         <meta charset="UTF-8">
 6         <title></title>
 7         <script type="text/javascript">
 8             var NotificationTest;
 9             function createNotification(){
10                 if(window.Notification.permission=="granted"){
11                     NotificationTest=new Notification("简单文本通知",{icon:"down.gif",body:"通知内容"});
12                     NotificationTest.onshow=function(){alert("通知被显示")}
13                     NotificationTest.onclose=function(){alert("通知被关闭")}
14                 }else if(window.Notification.permission=="default"){
15                     window.Notification.requestPermission();
16                 }
17             }
18             function closeNotification(){
19                 NotificationTest.close();
20             }
21         </script>
22     </head>
23 
24     <body >
25         <button onclick="createNotification()">显示通知</button>
26         <button onclick="closeNotification()">关闭通知</button>
27     </body>
28 
29 </html>

 1             function createNotification(){
 2                 if(window.Notification.permission=="granted"){
 3                     for(var i=0;i<10;i++)
 4                         NotificationTest=new Notification("简单文本通知",{icon:"down.gif",body:"通知第"+i+"内容"});
 5                     NotificationTest.onshow=function(){alert("通知被显示")}
 6                     NotificationTest.onclose=function(){alert("通知被关闭")}
 7                 }else if(window.Notification.permission=="default"){
 8                     window.Notification.requestPermission();
 9                 }
10             }