js闭包??

<script>var name = "The Window";var object = {name : "My Object",getNameFunc : function(){console.log("11111");console.log(this);  //this == object  //调用该匿名函数的是对象return function(){console.log("22222");console.log(this); //this == window   //匿名函数下的匿名函数return this.name;};}};alert(object.getNameFunc()());//--var name = "The Window";var object = {name : "My Object",getNameFunc : function(){var that = this;return function(){console.log("33333");console.log(this); //this==windowconsole.log("44444");console.log(that); //that==objectreturn that.name;};}};alert(object.getNameFunc()());</script>

function makeFunc() {var name = "Mozilla";function displayName() {alert(name);}return displayName; //返回一个函数
}
var myFunc = makeFunc(); //把函数返回值赋值给myFunc
console.log(myFunc); //输出函数内容
myFunc();//调用函数

function makeAdder(x) {return function (y) { //返回一个函数return x + y; //返回值
    };
}
var add4 = makeAdder(); //无传参函数返回值console.log("//无传参函数返回值");console.log(add4);//输出函数体console.log(add4(2)); //NaN  Number.NaN 是一个特殊值，说明某些算术运算（如求负数的平方根）的结果不是数字var add5 = makeAdder(5); //把函数返回值赋值给add5,console.log("//有参函数返回值");console.log(add5);//输出函数体console.log(add5(2));//7

    var Counter1 = (function () { })();console.log("输出立即调用函数返回值Counter1");console.log(Counter1); //undefinedvar Counter2 = (function () { var privateCounter = 0; })();console.log("输出立即调用函数返回值Counter2");console.log(Counter2); //undefinedvar Counter3 = (function () {var privateCounter = 0;function changeBy(val) {privateCounter += val;}})();console.log("输出立即调用函数返回值Counter3");console.log(Counter3); //undefined    //--var Counter4 = (function () {var privateCounter = 0;function changeBy(val) {privateCounter += val;}return {value: function () {return privateCounter;}}})();console.log("输出立即调用函数返回值Counter4");console.log(Counter4); //{value: ƒ} //类型object

var Counter = (function () {var privateCounter = 0;function changeBy(val) {privateCounter += val;}return {increment: function () {changeBy(1);},decrement: function () {changeBy(-1);},value: function () {return privateCounter;}}
})();
console.log(Counter.value()); /* logs 0 */ //返回0
Counter.increment(); //执行0+1
Counter.increment(); //执行1+1
console.log(Counter.value()); /* logs 2 */ //输出2
Counter.decrement(); //执行2+(-1)
console.log(Counter.value()); /* logs 1 */ //输出1