JavaScriptプライベートメンバーの実装例を詳しく解説

function testFn(){
    var _Name;//定义Javascript私有成员
    this.setName = function(name){
     _Name = name; //从当前执行环境中获取_Name
    }
    this.getName = function(){
     return _Name;
    }
}// End testFn
var test = testFn();
alert(typeof test._Name === "undefined")//true
test.setName("KenChen");

function testFn(name){
  this.Name = name;
  this.getName = function(){
   return this.Name;
  }
}
var test = new testFn("KenChen");
test.getName(); //KenChen
test.Name = "CC";
est.getName();//CC

function testFn(){
}
testFn.Name = "KenChen";
alert(testFn.Name);//KenChen
testFn.Name = "CC";
alert(testFn.Name);//CC