javascript - 实现jquery类似的$调用方法

var $ = {
            name: function (name) {
                return name;
            },
            age: function (age) {
                return age;
            },
            numCount: function (a, b) {
                return a + b;
            }
        }

        // window挂载在$,再赋值给jQuery
        window.jQuery = window.$;

        console.log($.name('张三'), jQuery.age(18), $.numCount(1, 2));