系统运行报错

Question

module.js:549    throw err;    ^Error: Cannot find module 'express'    at Function.Module._resolveFilename (module.js:547:15)    at Function.Module._load (module.js:474:25)    at Module.require (module.js:596:17)    at require (internal/module.js:11:18)    at Object.<anonymous>     at Module._compile (module.js:652:30)    at Object.Module._extensions..js (module.js:663:10)    at Module.load (module.js:565:32)    at tryModuleLoad (module.js:505:12)    at Function.Module._load (module.js:497:3)明明下了express  却还是说找不到

Answer 1

全局，局部都装一下express

全局安装  npm install express -g

局部安装 

npm install --save-dev express