购物车样式问题

@@ -28,7 +28,7 @@ const formatPromotionTitle = (promo) => {
     let match = regPromoTitle.exec(promo.promotion_title);
     let promotionTitle = match !== null && match.length > 1 ? match[1] : promo.promotion_title;
 
-    promotionTitle.replace('￥', '¥');
+    promotionTitle = promotionTitle.replace('￥', '¥');
     return `${title}【${promotionTitle}】`;
 };
 const formatPromotionOpt = (promo) => {