黑白

运行报错

1

``` Module build failed: ModuleBuildError: Module build failed: Error: Cannot find module 'less' at Function.Module._resolveFilename (module.js:555:15) at Function.Module._load (module.js:482:25) at Module.require (module.js:604:17) at require (internal/module.js:11:18) at Object. (G:\workspace\vue2-admin-demo\node_modules\less-loader\index.js:8:12) at Module._compile...

https://hulufei.gitbooks.io/react-tutorial/content/dom.html Refs 小节中 class App extends Component { constructor() { return { userInput: '' }; } 这里应改为 constructor(props) { super(props) this.state = { userInput: '' } }