spawn cmd ENOENT错误

项目场景：spawn cmd ENOENT错误

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问题描述

例如：使用Vue设置启动服务器时自动打开浏览器报错如下

Error: spawn cmd ENOENT
    at Process.ChildProcess._handle.onexit (internal/child_process.js:240:19)
    at onErrorNT (internal/child_process.js:415:16)
    at process._tickCallback (internal/process/next_tick.js:63:19)
Emitted 'error' event at:
    at Process.ChildProcess._handle.onexit (internal/child_process.js:246:12)
    at onErrorNT (internal/child_process.js:415:16)
    at process._tickCallback (internal/process/next_tick.js:63:19) npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! jian@0.1.0 start: `react-scripts start`
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the jian@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\asus\AppData\Roaming\npm-cache\_logs\2019-09-03T13_39_22_260Z-debug.log

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原因分析：

spawn xxx ENOENT 就是电脑缺失这个的系统变量，无法运行程序

拖到最下方解决这个bug方案

解决方案：

1、在根目录package.json文件下添加--open

"scripts": {
    "serve": "vue-cli-service serve --open",
    "build": "vue-cli-service build",
    "lint": "vue-cli-service lint"
  },

2、添加配置文件vue.config.js

module.exports = {
    devServer: {
        proxy:null,
        open:true	//添加配置项
    }
}

3.在config文件下的index.js下修改配置autoOpenBrowser:true运行后项目自启

最后发现上述方法是建于配置cmd的系统变量上运行的，所以我们配置cmd系统环境变量就好了