C:\Users\S'omnus>cd C:\Users\S'omnus\react-app

C:\Users\S'omnus\react-app>npm start

npm ERR! missing script: start

npm ERR! A complete log of this run can be found in:

npm ERR!     C:\Users\S'omnus\AppData\Roaming\npm-cache\_logs\2019-03-26T01_50_28_511Z-debug.log

运行npm start   或者   npm run start  的时候一直报错