Function onYearInput

src/index.ts:367–377

* Handles the year input and incrementing events * @param {Event} event the keyup or increment event

(event: KeyboardEvent & IncrementEvent)

   * @param {Event} event the keyup or increment event
   */
  function onYearInput(event: KeyboardEvent & IncrementEvent) {
    const eventTarget = getEventTarget(event) as HTMLInputElement;
    const year = parseInt(eventTarget.value) + (event.delta || 0);

    if (
      year / 1000 > 1 ||
      (event.key === "Enter" && !/[^\d]/.test(year.toString()))
    ) {
      changeYear(year);
    }
  }

  /**
   * Essentially addEventListener + tracking