Question

当我开始使用命令行npx create-react-app myapp创建我的第一个应用程序时，它没有启动，当我使用npm start时，出现以下错误。

运行命令后遇到的日志：

        Starting the development server...

    events.js:200
          throw er; // Unhandled 'error' event
          ^

    Error: spawn cmd ENOENT
    ←[90m    at Process.ChildProcess._handle.onexit (internal/child_process.js:264:19)←[39m
    ←[90m    at onErrorNT (internal/child_process.js:456:16)←[39m
    ←[90m    at processTicksAndRejections (internal/process/task_queues.js:81:21)←[39m
    Emitted 'error' event on ChildProcess instance at:
    ←[90m    at Process.ChildProcess._handle.onexit (internal/child_process.js:270:12)←[39m
    ←[90m    at onErrorNT (internal/child_process.js:456:16)←[39m
    ←[90m    at processTicksAndRejections (internal/process/task_queues.js:81:21)←[39m {
      errno: ←[32m'ENOENT'←[39m,
      code: ←[32m'ENOENT'←[39m,
      syscall: ←[32m'spawn cmd'←[39m,
      path: ←[32m'cmd'←[39m,
      spawnargs: [ ←[32m'/s'←[39m, ←[32m'/c'←[39m, ←[32m'start'←[39m, ←[32m'""'←[39m, ←[32m'/b'←[39m, ←[32m'"http://localhost:3000/"'←[39m ]
    }
    npm ERR! code ELIFECYCLE
    npm ERR! errno 1
    npm ERR! myapp@0.1.0 start: `react-scripts start`
    npm ERR! Exit status 1
    npm ERR!
    npm ERR! Failed at the myapp@0.1.0 start script.
    npm ERR! This is probably not a problem with npm. There is likely additional logging output above.

    npm ERR! A complete log of this run can be found in:
    npm ERR!     C:\Users\Believer\AppData\Roaming\npm-cache\_logs\2020-01-23T23_26_01_725Z-debug.log

    c:\Users\Believer\Documents\React\myapp>

Answer 1

首先删除node_modules目录，然后使用^([0-2][0-9]|(3)[0-1])(\.)(((0)[0-9])|((1)[0-2]))(\.)(\d{4}|\d{2})$

重新安装

然后是npm install

然后killall node

大多数情况下，当有多个应用程序在使用节点服务器时，会发生此错误

您也可以通过更改端口来尝试

在项目根目录下创建一个 .env 文件，并在其中指定端口号。喜欢：

npm start

如果这都不起作用，则意味着您没有多个应用程序正在运行的问题

无法创建第一个React应用，events.js：200抛出react

1 个答案: