網頁制作poluoluo文章簡介:JavaScript學習筆記:創建對象和構造類.
創建一個對象<script type="text/javaScript"> var newObject=new Object(); //創建一個對象 newObject.firstName="frank"; //增加一個firstName屬性 newObject.sayName=function(){ alert(this.firstName); } //添加一個sayName方法 //調用sayName方法 // newObject.sayName(); // newObject["sayName"](); var FirstName=newObject["firstName"]; var whatFunction; // if(whatVolume==1){ // whatFunction="sayName"; // }else if(whatVolume==2){ // whatFunction="sayLoudly" // } // newObject[whatFunction](); function sayLoudly(){ alert(this.firstName.toUpperCase()); } newObject.sayLoudly=sayLoudly; //另一種方式添加方法 newObject["sayLoudly"](); </script>
function sayLoudly(){ alert(this.firstName.toUpperCase()); } var newObject={ firstName:"frank", sayName:function(){alert(this.firstName);}, sayLoudly:sayLoudly }; //也可以這樣 var newObject={ firstName:"frank", sayName:function(){alert(this.firstName);}, sayLoudly:sayLoudly, lastName:{ lastName:"ziggy", sayName:function(){alert(this.lastName);} } }; newObject.lastName.sayName();
function sayLoudly(){ alert(this.name.toUpperCase()); } function sayName(){ alert(this.name); } var newObject={ name:"frank", sayName:sayName, sayLoudly:sayLoudly, lastName:{ name:"ziggy", sayName:sayName } }; newObject.lastName.sayName();
function newClass(){ alert("constructor"); this.firstName="frank"; this.sayName=function(){alert(this.firstName);} // return this; } //var nc=newClass(); var nc=new newClass(); //nc.firstName="ziggy"; is ok nc.sayName();
function newClass(){ this.firstName="frank"; } newClass.prototype.sayName=function(){ alert(this.firstName); } var nc=new newClass(); nc.firstName="ziggy"; nc.sayName(); var nc2=new newClass(); nc2.sayName();