为什么 npm start 会抛出 events.js:187 throw er;//我的反应项目中未处理的“错误"事件? [英] Why npm start is throwing events.js:187 throw er; // Unhandled 'error' event in my react project?

问题描述

在代码检出后第一次启动服务器时，我的 react js 项目抛出错误events.js:187扔er;//未处理的错误"事件".我有节点 12.13.0 和 npm6.12.0 .附加日志文件日志文件

While starting the server for the first time just after the code checkout , my react js project is throwing error "events.js:187 throw er; // Unhandled 'error' event" . I have node 12.13.0 and npm 6.12.0 . Log file attached log file

events.js:187
      throw er; // Unhandled 'error' event
      ^



    Error: spawn cmd ENOENT
        at Process.ChildProcess._handle.onexit 
       (internal/child_process.js:264:19)
       at onErrorNT (internal/child_process.js:456:16)
       at processTicksAndRejections (internal/process/task_queues.js:80:21)
    Emitted 'error' event on ChildProcess instance at:
       at Process.ChildProcess._handle.onexit (internal/child_process.js:270:12)
       at onErrorNT (internal/child_process.js:456:16)
       at processTicksAndRejections (internal/process/task_queues.js:80:21) {
    errno: 'ENOENT',
    code: 'ENOENT',
    syscall: 'spawn cmd',
    path: 'cmd',
    spawnargs: [ '/c', 'start', '""', '/b', 'http://localhost:3000/' ]
}

推荐答案

将 react-script 版本从 3.0.1 降级到 2.1.8 对我有用.依次执行以下命令:-npm install react-scripts@2.1.8npm 安装npm start

Downgrading the react-script version from 3.0.1 to 2.1.8 worked for me. Follow the following commands in sequence:- npm install react-scripts@2.1.8 npm install npm start

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