Event binding
Simple operation of jquery event:
##1. jquery event binding
$().bind(event type, function event handling);
$ ().bind(Type 1 Type 2 Type 3, event processing); //Bind the same process to many different types of events
$().bind(json object); //Bind at the same time Multiple different types of events
(Event type: click mouseover mouseout focus blur, etc.)
Event processing: named function, anonymous function
<!DOCTYPE html>
<html>
<head>
<title>php.cn</title>
<meta charset="utf-8" />
<script src="http://libs.baidu.com/jquery/1.10.2/jquery.min.js"></script>
<script>
//同一个对象绑定多个click事件
$(function(){
$('div').bind('click',function(){
console.log('谁在碰我？');
});
$('div').bind('click',function(){
console.log('谁又在碰我？');
});
$('div').bind('mouseover',function(){
//给div设置背景色
$(this).css('background-color','lightgreen');
});
$('div').bind('mouseout',function(){
//给div设置背景色
$(this).css('background-color','lightblue');
});
});
</script>
<style type="text/css">
div {width:300px; height:200px; background-color:lightblue;}
</style>
</head>
<body>
<div></div>
</body>
</html>1.2 Cancel event binding
① $().unbind(); //Cancel all events
② $().unbind(event type); //Cancel events of the specified type
③ $().unbind(event type, processing); //Cancel the specified processing event of the specified type
Note: For the ③ type of cancellation of event binding, the event processing must be a named function.
<!DOCTYPE html>
<html>
<head>
<title>php.cn</title>
<meta charset="utf-8" />
<script src="http://libs.baidu.com/jquery/1.10.2/jquery.min.js"></script>
<script>
//unbind()取消事件绑定操作
//以下f1和f2要定义到最外边，使用没有任何影响
function f1(){
console.log(1111);
}
function f2(){
console.log(2222);
}
$(function(){
$('div').bind('click',function(){
console.log('谁在碰我？');
});
$('div').bind('click',function(){
console.log('谁又在碰我？');
});
$('div').bind('click',f1);
$('div').bind('click',f2);
$('div').bind('mouseover',function(){
//给div设置背景色
$(this).css('background-color','lightgreen');
//$('div').css('background-color','lightgreen');
});
$('div').bind('mouseout',function(){
//给div设置背景色
$(this).css('background-color','lightblue');
//$('div').css('background-color','lightgreen');
});
});
function cancel(){
//取消事件绑定
$('div').unbind(); //取消全部事件
}
</script>
<style type="text/css">
div {width:300px; height:200px; background-color:lightblue;}
</style>
</head>
<body>
<div></div>
<input type="button" value="取消" onclick="cancel()">
</body>
</html>Event binding is just a form of rich event operations.
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