尝试将电子商务应用程序上传到Heroku时出现redux logger错误

Question

我正在尝试使用Moltin JS在React中构建一个电子商务商店应用程序。 每次尝试将其上传到Heroku时，都会出现空白页或错误。 该错误表明它无法解决“ redux-logger”。 我尝试过重新下载redux logger以及npm install。 我仍然收到相同的错误消息。 我也尝试过NPM更新。 当我从VS Code启动它时，它工作正常。
github docs Heroku页面

 // import the ability to modify browser history within our router import createHistory from 'history/createBrowserHistory'; // import our logger for redux import { createLogger } from 'redux-logger'; // import a library to handle async with redux import thunk from 'redux-thunk'; // import the redux parts needed to start our store import { createStore, applyMiddleware, compose } from 'redux'; // import the middleware for using react router with redux import { routerMiddleware } from 'react-router-redux'; // import the already combined reducers for redux to use import rootReducer from './ducks'; // import moltin API wrapper for use with Redux import * as api from './moltin'; // create and export history for router export const history = createHistory(); // combine the middlewares we're using into a constant so that it can be used by our store const middleware = [thunk.withExtraArgument(api), routerMiddleware(history)]; // declare any enhancers here const enhancers = []; // use Redux devtools if available in development if (process.env.NODE_ENV === 'development') { const devToolsExtension = window.devToolsExtension; if (typeof devToolsExtension === 'function') { enhancers.push(devToolsExtension()); } middleware.push(createLogger()); } // compose our middleware const composedEnhancers = compose(applyMiddleware(...middleware), ...enhancers); // create our redux store using our reducers and our middleware, and export it for use in index.js const store = createStore(rootReducer, composedEnhancers); export default store; 

Answer 1

诀窍是，Heroku在默认情况下仅在部署时安装生产依赖项，因此，通过运行npm install --production在package.json的dependencies项项下列出的dependencies项就可以npm install --production 。

devDependencies应用程序运行至关重要的依赖项（例如redux-logger）从devDependencies移至dependencies ，这应该可以解决您的问题。

devDependencies用于支持开发的事物，但对于运行应用的生产副本不是必需的，例如测试模块。