标签：javascript jquery
$.extend()用法总结。jQuery.extend(object);
jQuery.extend(object);为扩展jQuery类本身.为类添加新的方法。<span style="font-size:18px;"><html>
<head>
<title></title>
</head>
<body>
<h3 class="ye">new soul</h3>
<h3 class="ye">new soul</h3>
<h3 class="ye">new soul</h3>
<h3 class="ye">new soul</h3>
<script type="text/javascript" src="jquery.2.0.3.js"></script>
<script type="text/javascript">
jQuery.fn.myPlugin = function(options) {
$options = $.extend( {
html: "no messages",
css: {
"color": "red",
"font-size":"14px"
}},
options);
return $(this).css({
"color": $options.css.color,
}).html($options.html);
}
$('.ye').myPlugin({html:"So easy,yes?",css:{"color":"green","font-size":"20px"}});
</script>
</body>
</html>
</span>
1.合并多个对象。
这里使用的就是$.extend()的嵌套多个对象的功能。
所谓嵌套多个对象，有点类似于数组的合并的操作。
但是这里是对象。举例说明。
<span style="font-size:18px;">//用法: jQuery.extend(obj1,obj2,obj3,..)
var Css1={size: "10px",style: "oblique"}
var Css2={size: "12px",style: "oblique",weight: "bolder"}
$.jQuery.extend(Css1,Css2)
//结果:Css1的size属性被覆盖,而且继承了Css2的weight属性
// Css1 = {size: "12px",style: "oblique",weight: "bolder"}
</span>
<span style="font-size:18px;"> jQuery.extend(
{ name: “John”, location: { city: “Boston” } },
{ last: “Resig”, location: { state: “MA” } }
);
// 结果:
// => { name: “John”, last: “Resig”, location: { state: “MA” } }
// 新的更深入的 .extend()
jQuery.extend( true,
{ name: “John”, location: { city: “Boston” } },
{ last: “Resig”, location: { state: “MA” } }
);
// 结果
// => { name: “John”, last: “Resig”,
// location: { city: “Boston”, state: “MA” } }
</span>
<span style="font-size:18px;"><html>
<head>
<title></title>
</head>
<body>
<script type="text/javascript" src="jquery.2.0.3.js"></script>
<script type="text/javascript">
$.extend({
add:function(a,b){return a+b;},
minus:function(a,b){return a-b},
multiply:function(a,b){return a*b;},
divide:function(a,b){return Math.floor(a/b);}
});
var sum = $.add(3,5)+$.minus(3,5)+$.multiply(3,5)+$.divide(5,7);
console.log(sum);
</script>
</body>
</html></span>Best WishesjQuery $.extend()用法,布布扣,bubuko.com
标签：javascript jquery
原文地址：http://blog.csdn.net/lcstrive/article/details/30966125
