lil' system to make requesting and canceling AnimationFrames a breeze

animFrame.js

function animFrame(func) {
      return new class {
          constructor(fn) {
              this.fn = fn
          }
          start() {
              this.fn();
              this.interval = requestAnimationFrame(this.start.bind(this));
              return this
          }
          stop() {
              if (this.interval != undefined) cancelAnimationFrame(this.interval);
              return this
          }
          reset(fn) {
              this.stop();
              this.fn = fn;
              return this.start()
          }
      }(func)
  }