__toggleSpinnerButtonsState() {
    const { min, max } = this.values;
    const decrementButton = /** @type {HTMLButtonElement} */ (this.__getSlot('prefix'));
    const incrementButton = /** @type {HTMLButtonElement} */ (this.__getSlot('suffix'));
    const disableIncrementor = this.currentValue >= max && max !== Infinity;
    const disableDecrementor = this.currentValue <= min && min !== Infinity;
    if (
      (disableDecrementor && decrementButton === document.activeElement) ||
      (disableIncrementor && incrementButton === document.activeElement)
    ) {
      this._inputNode.focus();
    }
    decrementButton[disableDecrementor ? 'setAttribute' : 'removeAttribute']('disabled', 'true');
    incrementButton[disableIncrementor ? 'setAttribute' : 'removeAttribute']('disabled', 'true');
    this._updateAriaAttributes();
  }
Toggle disabled state for the buttons
@private