Fibonacci

fibonacci.js

class Fibonacci {

  constructor(countUntil) {
    this.a = 0;
    this.b = 1;
    this.c = 1;

    this.r = [this.a, this.b];

    if(countUntil) {
      this.count = countUntil;
    }
  }

  get result() {
    return this.r;
  }
  
  set count(until) {
    this.c = this.a + this.b

    if(this.c < until) {
      this.a = this.b
      this.b = this.c
      this.r.push(this.c)
      this.count = until
    }
  }
}

f = new Fibonacci(200)
console.log(f.result)