Method action

src/controller/Key.js:42–53

* Calls the relevant action for the current state of the key. * @memberof Key

()

   * @memberof Key
   */
  action() {
    if (1 === this.state) {
      if (this.actions.down) {
        this.actions.down();
      }
    } else if (2 === this.state) {
      if (this.actions.up) {
        this.actions.up();
      }
      this.updateState(0);
    }
  }

  /**
   *