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characters

返回值:BooleanjQuery.isFunction(obj)

概述

测试对象是否为函数。

注意:jQuery 1.3以后,在IE浏览器里,浏览器提供的函数比如'alert'还有 DOM 元素的方法比如 'getAttribute' 将不认为是函数

参数

objObjectV1.2

用于测试是否为函数的对象

示例

描述:

检测是否为函数

jQuery 代码:
function stub() {
    }
var objs = [
            function () {},
            { x:15, y:20 },
            null,
            stub,
            "function"
          ];
        jQuery.each(objs, function (i) {
        var isFunc = jQuery.isFunction(objs[i]);
        $("span:eq( " + i + ")").text(isFunc);
      });
结果:
[ true,false,false,true,false ]
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