Class definition with methods

jsbasicclass.txt

class Fraction{
  constructor(top, bottom){
        this.num = top;
        this.den = bottom;
  }

  show() {
   console.log('${this.num}/${this.den}');
  }


 gcd(m = this.num, n = this.den){

  while((m%n) != 0){
   let oldm = m;
   let oldn = n;

   m = n;
   n = oldm%oldn;

   }
  return n;
 }

 plus(fraction){
   let newnum = this.num * fraction.den + this.den * fraction.num;
   let newden = this.den * fraction.den;
   let common = this.gcd(newnum,newden);
   return new Fraction(Math.trunc(newnum/common),Math.trunc(newden/common));

  }

 equal(fraction) {
  let firstNum = this.num * fraction.den;
  let seconNum = fraction.num * this.den;

  return firstNum == seconNum;
 }

 }
var f1 = new Fraction(2,3);
console.log(f1.num);
var f2 = new Fraction(2,3);

console.log(f1.equal(f2));
console.log(f1.plus(f2));