一、对象和属性和方法
JavaScript中对象：
var person={name:"Jack",age:20};或：
var name = "jack";
var age = 20;
var person = {name:name,age:age};
console.log(person.age); //20ES6中的简洁表示：
let [name,age]=["jack",20];
let person = {name,age}; //等同person = {name: name,age: age}
console.log(person.age); //20JavaScript中对象方法：
var person = {
SayHi:function()
{
console.log("hi");
}
}
person.SayHi(); //hiES6中简洁表示：
let person = {
SayHi()
{
console.log("hi");
}
}
person.SayHi();ES6允许用表达式作为属性名，但是一定要将表达式放在方括号内：
var person = {["na" "me"]:"jack",["a" "ge"]:20};
console.log(person.age);或
let str = "Hi";
let person = {
["Say" str](){
console.log("hi");
}
}
person.SayHi();注意点：属性的简洁表示法和属性名表达式不能同时使用，否则会报错：
let [name,age]=["jack",20];
let person = {["na" "me"],["a" "ge"]}; //报错二、对象的扩展运算符...
取出参数对象所有可遍历属性然后拷贝到当前对象：
let stu1 = {name:"Jack",age:20,sex:"男"};
let stu2 = {...stu1};
console.log(stu2); //{name: "Jack", age: 20,sex:"男"}合并两个对象：
let stu1BasicInfo = {name:"Jack",age:20,sex:"男"};
let stu1DetailInfo = {phone:"13524521457",mail:"ldh@163.com"};
let stu = {...stu1BasicInfo,...stu1DetailInfo};
console.log(stu);
//{name:"Jack",age:20,sex:"男",phone:"13524521457",mail:"ldh@163.com"}拷贝对象时支持添加属性：
let stu1 = {name:"Jack",age:20,sex:"男"};
let stu2 = {...stu1,phone:"13554785452"};
console.log(stu2); //{name:"Jack",age:20,sex:"男",phone:"13554785452"}添加的属性在拓展运算符后面，取添加的属性：
let stu1 = {name:"Jack",age:20,sex:"男"};
let stu2 = {...stu1,name:"rose",phone:"13554785452"};
console.log(stu2);
//{name:"rose",age:20,sex:"男",phone:"13554785452"}添加的属性在拓展运算度前面，取扩展运算符内容：
let stu1 = {name:"Jack",age:20,sex:"男"};
let stu2 = {name:"rose",phone:"13554785452",...stu1};
console.log(stu2);
//{name:"Jack",phone:"13554785452"，age:20,sex:"男"}到此这篇关于ES6基础语法之对象的文章就介绍到这了。希望对大家的学习有所帮助，也希望大家多多支持Devmax。