npm ERR! missing script: dev

[lilakima]

yangziyi@Yangde-MacBook-Pro ~/Desktop/vueTest
$ npm run dev
npm ERR! missing script: dev

npm ERR! A complete log of this run can be found in:
npm ERR! /Users/yangziyi/.npm/_logs/2019-06-01T05_01_25_011Z-debug.log
yangziyi@Yangde-MacBook-Pro ~/Desktop/vueTest
$ npm start
npm ERR! missing script: start

npm ERR! A complete log of this run can be found in:
npm ERR! /Users/yangziyi/.npm/_logs/2019-06-01T05_04_31_007Z-debug.log