<!DOCTYPE HTML>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>无标题文档</title>
<script src="jquery-2.0.3.js"></script>
<script>
----------------------------------------------------------------------
var str = ' hello ';
alert( '('+$.trim(str)+')' );//前后空格，不包括里面空格，
alert( '('+str.trim()+')' );
----------------------------------------------------------------------
window.onload = function(){
var aDiv = document.getElementsByTagName('div');
console.log( $.makeArray( aDiv ) );//[div,div,div]
var s = 123;
console.log( $.makeArray( s ) );//[123]
console.log( $.makeArray( s , {length:3} ) );//Object {3: 123, length: 4}
var str = 'hello';
console.log( $.makeArray( str ) );//['hello']
console.log( $.makeArray( str , {length:3} ) );//Object {3: "hello", length: 4}
var str = {1:1,2:2};
console.log( $.makeArray( str ) );//[{1:1,2:2}]
console.log( $.makeArray( str , {length:3} ) );//{3:{1:1,2:2},length: 4}
};
---------------------------------------------------------------------------
var arr = ['a','b','c','d'];
alert( $.inArray( 'w' , arr ) ); indexOf
---------------------------------------------------------------------------
console.log($.merge(['a','b'],['c','d']));//["a", "b", "c", "d"]
console.log($.merge(['a','b'],{0:'c',1:'d'}));//["a", "b", "c", "d"]
console.log( $.merge({0:'a',1:'b',length:2},{0:'c',1:'d'}) );//{0: "a", 1: "b", 2: "c", 3: "d", length: 4}
console.log( $.merge({0:'a',1:'b',length:2},['c','d']) );// {0: "a", 1: "b", 2: "c", 3: "d", length: 4}
</script>
</head>
<body>
<div></div>
<div></div>
<div></div>
</body>
</html>
<!DOCTYPE HTML>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>无标题文档</title>
<script src="jquery-2.0.3.js"></script>
<script>
------------------------------------------------------------------------
var arr = [1,2,3,4];
arr = $.grep( arr , function( n , i ){//n是每一项，i是下标
return n>2;
} , true );
console.log( arr );//[1,2]
var arr = [1,2,3,4];
arr = $.grep( arr , function( n , i ){//n是每一项，i是下标
return n>2;
});
console.log( arr );//[3,4]
------------------------------------------------------------------------
var arr = [1,2,3,4];
arr = $.map( arr , function(n){
return [n+1];
} );
console.log( arr );//[2,3,4,5]
------------------------------------------------------------------------
</script>
</head>
<body>
</body>
</html>
<!DOCTYPE HTML>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>无标题文档</title>
<script src="jquery-2.0.3.js"></script>
<script>
$(function(){
function show(){
alert(this);
}
$('input:eq(0)').click( show );
$('input:eq(1)').click(function(){
$('input:eq(0)').off();//取消第一个的绑定
});
});
$(function(){
function show(){
alert(this);
}
$('input:eq(0)').click( $.proxy(show,window) );//改变show的this是window，
$('input:eq(1)').click(function(){
$('input:eq(0)').off();//取消第一个的绑定
});
});
--------------------------------------------------------------------------
function show(n1,n2){
alert(n1);
alert(n2);
alert(this);
}
show();//window
$.proxy(show,document)(3,4);//改变show的this是document,执行，$.proxy()返回值是一个函数名函数地址，加小括号返回的函数才执行，
$.proxy(show,document,3)(4);//改变show的this是document,执行，
$.proxy(show,document,3);//不执行,返回函数地址，
var obj = {
show : function(){
alert(this);
}
};
$(document).click( obj.show );//this是document
$(document).click( $.proxy(show,obj) );//this是obj
$(document).click( $.proxy(obj,'show') );//让obj下面的show指向obj
//$.proxy(obj,'show') -> $.proxy(obj.show,obj)
</script>
</head>
<body>
<input type="button" value="点击">
<input type="button" value="取消绑定">
</body>
</html>
<!DOCTYPE HTML>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>无标题文档</title>
<script src="jquery-2.0.3.js"></script>
<script>
$().css(); $().attr(); set/get
$(function(){
alert( $('#div1').css('width') );
$('#div1').css('background','yellow');
$('#div1').css('background','yellow');
$('#div1').css('width','300px');
$('#div1').css({ background : 'yellow' , width : '300px' });
alert( $.now() );//1970年的时间
(new Date()).getTime()
});
</script>
</head>
<body>
<div id="div1" style="width:100px; height:100px; background:red">aaaa</div>
</body>
</html>
<!DOCTYPE HTML>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>无标题文档</title>
<script src="jquery-2.0.3.js"></script>
<script>
$(function(){
alert( $('#div1').width() );//display:none还是获取到了，利用的是swap方法
alert( $('#div1').get(0).offsetWidth );//原生的宽度方法，display:none就获取不到了
function show(){
arguments.length
}
show(1,2,3,4);
});
</script>
</head>
<body>
<div id="div1" style="width:100px; height:100px; background:red;display:block; visibility:hidden; position:absolute;">aaaa</div>
</body>
</html>
