Vadim Bogomazov

const mainWal = document.querySelector('.main__wal');
const clipS = document.querySelector('.clip__s');
const clipSel = document.querySelector('.clip__sel');


mainWal.style.overflowY = 'hidden';
clipS.style.cssText = `opacity: 0.7; top: ${mainWal.scrollTop}px, z-index: 5;`;
clipSel.style.cssText = `height: ${this.height + 100}px; opacity: 1; top: ${mainWal.scrollTop}px, width: ${this.width}px; z-index: 6;`;

class User {                                          
    constructor (argname) {
        this.name = argname;
    }
    sayHi() {
        alert("Меня зовут: " + this.name);  
    }
} 

var vasya = new User("Вася",20);
 
vasya.sayHi();