0722class 类介绍数组与对象解构

class 类介绍

js中没有类，其实都是函数

class Demo1 {
            //公共成员
            username = '测试';
            //构造方法，实例初始化
            constructor(name,email){
                //自由属性
                this.name = name;
                this.email = email;
            }
            //共享 成员；原型成员
            getInfo(){
                return `${this.name} : (${this.email})`;
            }
            //静态成员
            static status = 'enabled';
        }

数组与对象解构

  let [username, useremail] = ['测试中', '333@qq.com'];
        console.log(username, useremail);
        console.log('----------------------');
        //更新 
        [username, useremail] = ['测试中中', '333@qq.com'];
        console.log(username, useremail);
        console.log('----------------------');

 let {id, lesson, soure} = {id:1,lesson:'js',soure:88};
        console.log(id, lesson, soure);
        ({id, lesson, soure} = {id:2,lesson:'php',soure:88});
        console.log(id, lesson, soure);
        let {id: itemid, num, price} = {id:3, num:10, price:1234};
        console.log(itemid, num, price);