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1
<!DOCTYPE html>2
<html>3
<head>4
<meta charset="utf-8">5
<title>时代Java与您共同学习(NowJava.com)</title> 6
<script src="https://cdn.staticfile.org/jquery/1.10.2/jquery.min.js"></script>7
</head>8
<body>9
10
<script>11
$(function () { 12
function fn1( value ) {13
alert( value );14
return false;15
}16
17
function fn2( value ) {18
fn1( "fn2 says: " + value );19
return false;20
}21
var topics = {};22
jQuery.Topic = function( id ) {23
var callbacks,24
method,25
topic = id && topics[ id ];26
27
if ( !topic ) {28
callbacks = jQuery.Callbacks();29
topic = {30
publish: callbacks.fire,31
subscribe: callbacks.add,32
unsubscribe: callbacks.remove33
};34
if ( id ) {35
topics[ id ] = topic;36
}37
}38
return topic;39
};40
// 订阅者41
$.Topic( "mailArrived" ).subscribe( fn1 );42
$.Topic( "mailArrived" ).subscribe( fn2 );43
$.Topic( "mailSent" ).subscribe( fn1 ); 44
// 发布者45
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