classes.js

// Execute using --use_strict tag "node --use_strict classes.js"

class Human {
    constructor(name, job, skills = []){
        this.name = name;
        this.job = job;
        this.skills = skills;
    }

    getJob(){
        return this.job;
    }

    setJob(newJob){
        this.job = newJob;
    }

    leaveJob(){
        this.job = "unemployed";
    }

    learnNewSkill(newSkill){
        this.skills.push(newSkill);
    }

    forgetSkill(skill){
        this.skills  = this.skills.filter(element => element !== skill);
    }
}

class Student extends Human {
    constructor(){
        super();
    }
}

let human = new Human("Amine", "Freelancer", ["Android", "Web", "SysAdmin"]);
let me = new Student();

// setJob to set a Job | getJob to get a Job
me.setJob("Web developer");
me.learnNewSkill("React");
me.forgetSkill("React");
me.leaveJob();