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ES6对象操作

1、对象的赋值

ES5语法

let name = 'sun'
let skill = 'web'
let obj = {
  name: name,
  skill: skill
}
console.log(obj); 

 

ES6语法

let name = 'sun'
let skill = 'web'
let obj = {
  name,
  skill
}
console.log(obj);

 

结果是相同的,这样会减少代码量

 

2、key值的构建
let key = 'skill'
let obj = {
  [key]: 'web'
}
console.log(obj);

 

 

3、自定义对象的方法

let obj={
  add:function(a,b){
    return a+b
  }
}
console.log(obj.add(1,2)); //3
 
4、is()方法
let obj1 = {
  name: 'js'
}
let obj2 = {
  name: 'js'
}
console.log(obj1.name === obj2.name); //true
console.log(Object.is(obj1.name,obj2.name)); //true
 
===与is()的区别:===通值相等,is严格相等
console.log(+0 === -0); //true
console.log(NaN === NaN); //false
console.log(Object.is(+0, -0)); //false
console.log(Object.is(NaN, NaN)); //true
 
5、assign 合并对象
let a = {
  a: 'js'
}
let b = {
  b: 'sun'
}
let c = {
  c: 'web'
}
let d = Object.assign(a, b, c)
console.log(d);

 

posted @ 2019-05-13 08:41  孙~洋  阅读(862)  评论(0编辑  收藏  举报