_addInputEvent() {
    if (this.rangeInputElement) {
      this.rangeInputElement.addEventListener('keydown', this.eventHandler.changeInputWithArrow);
      this.rangeInputElement.addEventListener('keydown', this.eventHandler.changeInput);
      this.rangeInputElement.addEventListener('blur', this.eventHandler.changeInputFinally);
    }
  }
Add range input editing event
@private