優惠券代碼 aria-scribedby="coupon-input-addon" placeholder="輸入優惠券代碼" data-wp-bind--value="state.promotionCode" data-wp-on--keydown="surecart/checkout::actions. maybeApplyDiscountOnKeyChange “ data-wp-on--keyup="surecart/checkout::actions.maybeApplyDiscountOnKeyChange"> 申請