ES6-對象賦值，key值得構建，is()方法對比對象，assign()合併對象

ES6對象賦值：

// es5
let name = "ananiah";
let skill ='web';
let obj = {name:name,skill:skill};
console.log(obj)

// es6 用變數形式賦值
let name = "ananiah";
let skill ='web';
let obj = {name,skill};
console.log(obj)

key值構建

// es6-key值的構建
let key = "skill";
var obj ={
    [key]:'web'
}
console.log(obj)

es5自定義對象方法

//自定義對象的方法(es5)
let objobj = {
    add:function(a,b){
        return a+b;
    }
}
console.log(objobj.add(2,3)) //5

is() 比較兩個對象

//is() 用來比較兩個對象
let obja = {name:'annaiah'};
let objb = {name:'annaiah'};
console.log(obja.name===objb.name) //true  es5方法
console.log(Object.is(obja.name,objb.name)) //true  

//上面兩個方法的區別： === 同值相等 is嚴格相等
console.log(+0 === -0); //true
console.log(NaN === NaN); //false 

console.log(Object.is(+0,-0));    //false
console.log(Object.is(Nan,NaN));  //true

//assign 合併對象
let a = {a:'annaiah'};
let b = {b:'大誒啊'};
let c = {c:'web'};
let d = Object.assign(a,b,c);
console.log(d)