购物车兼容性

@@ -47,7 +47,7 @@ exports.showStorage = (leftNumber) => {
     leftNumber = typeof num1 === 'number' ? leftNumber : parseFloat(leftNumber, 10);
 
     if (leftNumber <= 3 && leftNumber >= 0) {
-        return '仅剩' + leftNumber + '件';
+        return `仅剩${leftNumber}件`;
     } else if (leftNumber < 0) {
         return '库存不足';
     }

@@ -7,7 +7,7 @@ module.exports = function(leftNumber) {
     leftNumber = typeof num1 === 'number' ? leftNumber : parseFloat(leftNumber, 10);
 
     if (leftNumber <= 3 && leftNumber >= 0) {
-        return `仅剩${leftNumber}件`;
+        return '仅剩' + leftNumber + '件';
     } else if (leftNumber < 0) {
         return '库存不足';
     }