1.Error：The "injectBabelPlugin" helper has been deprecated as of v2.0. You can use customize-cra plugins in replacement - https://github.com/arackaf/customize-cra#available-plugins
原因： react-scripts 升级到 2.1.2 以后破坏了 react-app-rewired;然后 react-app-rewired 升级到 2.x 以后直接干掉了所有 helpers。直接把 react-app-rewired降到1.5.2即可
npm install [email protected] --save