如何修复('throw er;//未处理的'错误'事件')代码生命周期? [英] How can I fix ('throw er; // Unhandled 'error' event') code lifecycle?

问题描述

我试图创建一个React应用.我使用了命令提示符，但是在创建应用后，当我尝试启动npm时，它给了我一些错误.

I tried to create a React app. I used the command prompt but after the app was created when I tried to start the npm it gives me some errors.

我也尝试在WebStorm，IntelliJ和Visual Studio Code/PowerShell中创建React应用，但仍然给出了同一组错误.

这是我得到的错误:

我尝试了很多事情，例如清理npm缓存，重新安装npm和节点，将npm升级到新版本，尝试升级react，但没有任何效果.

I tried many things like cleaning the npm cache, reinstalling npm and node, upgrading npm to new versions, tried to upgrade react but nothing worked.

events.js:173
      throw er; // Unhandled 'error' event
npm ERR! code ELIFECYCLE
npm ERR! errno 1

gives some errors : 
events.js:173
      throw er; // Unhandled 'error' event
      ^

但是它应该启动npm并给localhost 3000

but it should start the npm and giving the localhost 3000

推荐答案

1. 检查您的节点版本.更新节点和npm
2. 如果您使用的是macOS或linux，请尝试 sudo npm start
3. 尝试再次下载create-react-app npm i -g create-react-app
4. 尝试在另一个文件夹中创建应用 create-react-app APPNAME
5. 仍然无法正常工作吗?然后删除 node_module 文件夹， package-lock.json 并运行 npm install
6. 尝试在另一个PORT上运行

1. Check your node version. update node & npm
2. Try sudo npm start if you are in macOS or linux
3. Try to download create-react-app again npm i -g create-react-app
4. Try to create the app in another folder create-react-app APPNAME
5. Still not working? Then delete node_module folder, package-lock.json and run npm install
6. Try to run on another PORT

更新

react-script 版本也可能存在问题.您可以尝试降级react脚本，

Also there can be have a problem with react-script version. You can try to downgrade the react script,

create-react-app my-app
cd my-app
npm install react-scripts@2.1.8
npm start

此外，请确保您在 PATH 环境变量中具有此条目.

Also, make sure you have this entry in your PATH environment variable.

C:\ Users \ {用户名} \ AppData \ Roaming \ npm

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