class Person {
    isHuman = true;
    constructor(name) {
        this.name = name;
    }

    speak() {
        console.log('Hello this is ' + this.name);
    }
}

const pooya = new Person('Pooya');
pooya.speak();
// ✅ 
// we can change class property 
pooya.isHuman = false;
// ✅ end
console.log(pooya.isHuman);