3 回答 vue Cannot read property 'toLowerCase' of undefined

5 回答找不到DefinePlugin這個方法

2 回答npm run dev 報錯ERROR in The "path" argument must be of type string. Received type undefined

1 回答使用npm run dev的時候報錯：ERROR in The "path" argument must be of type string. Received type undefined

2 回答定義過了cross-env NODE_ENV=production，為什么還要在DefinePlugin里面定義一遍？