Update index.tsx

src/views/cart/cart-confirm/index.tsx

@@ -149,7 +149,7 @@ export default defineComponent({
         cartIds: ids,
         memberReceiveAddressId: address.value?.id,
         platformType: state.platformType,
-        orderAmount: (payAmount >= 0 ? payAmount : 0).toFixed(2),
+        orderAmount: Number((payAmount >= 0 ? payAmount : 0).toFixed(2)),
         couponId: cartUseAmount.value.couponId,
         useBalance: cartUseAmount.value.useBalance // 是否使用余额
       }