Vue warn]: Property or method "cartlist" is not defined on the instance but referenced during render. Make sure that this property is reactive, either in the data option, or for class-based components, by initializing the property. See
请问我的这个为啥总报错，我这个定义了，刚开始是没有问题的，在往下嵌套的时候，就变成这样，然后，把之前的删了，这个问题一样存在，求解？
