クーポンコード aria-describedby="coupon-input-addon" placeholder="クーポンコードを入力" data-wp-bind--value="state.promotionCode" data-wp-on--keydown="surecart/checkout::actions.maybeApplyDiscountOnKeyChange" data-wp-on--keyup="surecart/checkout::actions.maybeApplyDiscountOnKeyChange" > 適用する