Method update

src/controller/Controller.js:36–40

* Calls all functions for buttons that are currently set to enabled. * @memberof Controller

()

   * @memberof Controller
   */
  update() {
    for (let i = 0, l = this.keys.length; i < l; i++) {
      this.buttons[this.keys[i]].action();
    }
  }

  /**
   * Called on keyup. Sets flag to 1 if key is being watched.