JS 建立物件的方法

//方法1//利用[]建立物件var person = new Object();person["firstname"] = "Yang";person["lastname"] = "Danny";//呼叫物件console.log(person["firstname"]); //Yang//可以放变数，去呼叫var q = "lastname";console.log(person[q]); //Danny//方法2//利用.建立物件person.address = new Object();person.address.country = "Taiwan";person.address.city = "Taipei";person.address.locate = "101";//呼叫物件console.log(person.address); //{country: "Taiwan", city: "Taipei", locate: "101"}console.log(person.address.country); // Taiwanconsole.log(person["address"]["locate"]);// 101//方法3//利用{}建立物件var person = {    firstname: "Yang",    lastname: "Danny",    address:{        country: "Taiwan",        city: "Taipei",        locate: "101"    }};function sayHello(){    console.log("Hi "+person.lastname);}sayHello(); //Hi Danny