so 41080980 created by sean9999 - https://repl.it/EmmE/1

so 41080980.js

class First {
    constructor() {
        this.loc = '1';
    }
    test() {
        console.log('first', this.loc);
    }
}

class Second extends First {
    constructor() {
        super();
        this.loc = '2';
    }
    test() {
      console.log('second',this.loc);
      super.test();
    }
}

class Third extends Second {
    constructor() {
        super();
        this.loc = '3';
    }
    test() {
        console.log('third',this.loc);
        super.test();
    }
}

let t = new Third();
t.test();