-
Notifications
You must be signed in to change notification settings - Fork 13
/
Copy pathpub-sub.html
69 lines (68 loc) · 1.8 KB
/
pub-sub.html
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
<html>
<head>
<script src="//cdn.bootcss.com/jquery/3.1.1/jquery.js"></script>
<style type="text/css">
.demo{
border:1px solid coral;
padding:30px;
margin:5px;
}
</style>
<script type="text/javascript">
var PubSub = function(){
this.eventPool = {}; //存储事件映射表
};
PubSub.prototype.off = function(topicName){
delete this.eventPool[topicName]
};
PubSub.prototype.on = function(topicName,callback){
var topic = this.eventPool[topicName] ;
if(!topic){
this.eventPool[topicName] =[]
}
this.eventPool[topicName].push(callback)
}
PubSub.prototype.trigger = function(){
var _arg = [].slice.call(arguments);
var topicName=_arg.shift();
var callbackArg = _arg;
var topicCallback = this.eventPool[topicName]
if(topicCallback){
topicCallback.forEach(function(callback){
callback.apply(this,callbackArg)
});
}
};
</script>
</head>
<body>
<div>pub-sub设计模式</div>
<div class="demo pub-sub">
pub-sub订阅发布举例子
<button id="ps-btn">
点击从
<span>0</span>
开始进行加法计算
</button>
<div id="pub-sub">
数据总和为 ---- <span>0</span>
</div>
<script type="text/javascript">
var pubSub = new PubSub();
pubSub.on('click',function(data){
$('#ps-btn span').html(data[data.length - 1]);
});
pubSub.on('click',function(data){
var value = data.reduce(function(pre,cur){return pre+cur},0)
$('#pub-sub span').html(value);
});
var data = [0];
$('#ps-btn').click(function(){
var randomNum = Math.floor(Math.random() * 100);
data.push(randomNum);
pubSub.trigger('click',data);
})
</script>
</div>
</body>
</html>