ES6

<script>
        class Person {
            personName = "ÈËÀà"
        }
        class User extends Person {
            userId = 'admin';
            userName = "¹ÜÀíÔ±";
            constructor() {
                super()
            }
            run() {
                console.log("run")
                console.log(this.personName)
            }
            jump = function () {
                console.log("jump")
            }
            eat = () => {
                console.log('eat')
                console.log('usrName: ' + this.userName)
            }
        }
        let u1 = new User()
        u1.run();
        u1.jump()
        u1.eat()
        let u2 = new User("zs", "ÕÅÈý")
        u2.run();
        u2.jump()
        u2.eat()
        const { userId, userName } = u1
        console.log(userId)
    </script>

let user = {name:"ÀîÀ×", age: 20}
let u = {...user}