如何解决 npm 启动错误，它们是什么意思？答案

【问题标题】：How to resolve npm start errors and what do they mean?如何解决 npm 启动错误，它们是什么意思？
【发布时间】：2021-05-02 15:01:11
【问题描述】：

我正在尝试查看一个预先建立的 React.js 项目以进行编码训练营。我在尝试启动 React (npm start) 时在我的 PC 上收到此消息。

npm audit fix
npm WARN deprecated mkdirp@0.5.1: Legacy versions of mkdirp are no longer supported. Please update to mkdirp 1.x. (Note that the API surface has changed to use Promises in 1.x.)
npm WARN optional SKIPPING OPTIONAL DEPENDENCY: fsevents@~2.3.1 (node_modules\watchpack\node_modules\chokidar\node_modules\fsevents):
npm WARN notsup SKIPPING OPTIONAL DEPENDENCY: Unsupported platform for fsevents@2.3.2: wanted {"os":"darwin","arch":"any"} (current: {"os":"win32","arch":"x64"})
npm WARN tsutils@3.17.1 requires a peer of typescript@>=2.8.0 || >= 3.2.0-dev || >= 3.3.0-dev || >= 3.4.0-dev || >= 3.5.0-dev || >= 3.6.0-dev || >= 3.6.0-beta || >= 3.7.0-dev || >= 3.7.0-beta but none is installed. You must install peer dependencies yourself.

npm ERR! code EEXIST
npm ERR! path D:\[Dearest_Lord_God,_please_intuitively_reveal_the_things_that_used_to_baffle_me]\[Projects-React]\bey-slay\node_modules\.bin\handlebars
npm ERR! Refusing to delete D:\[Dearest_Lord_God,_please_intuitively_reveal_the_things_that_used_to_baffle_me]\[Projects-React]\bey-slay\node_modules\.bin\handlebars: is outside D:\[Dearest_Lord_God,_please_intuitively_reveal_the_things_that_used_to_baffle_me]\[Projects-React]\bey-slay\node_modules\handlebars and not a link
npm ERR! File exists: D:\[Dearest_Lord_God,_please_intuitively_reveal_the_things_that_used_to_baffle_me]\[Projects-React]\bey-slay\node_modules\.bin\handlebars
npm ERR! Remove the existing file and try again, or run npm
npm ERR! with --force to overwrite files recklessly.

npm ERR! A complete log of this run can be found in:
npm ERR!     C:\Users\imcke\AppData\Roaming\npm-cache\_logs\2021-05-02T14_24_44_795Z-debug.log

D:\[Dearest_Lord_God,_please_intuitively_reveal_the_things_that_used_to_baffle_me]\[Projects-React]\bey-slay>npm start

> bey-slay@0.1.0 start D:\[Dearest_Lord_God,_please_intuitively_reveal_the_things_that_used_to_baffle_me]\[Projects-React]\bey-slay
> react-scripts start

'react-scripts' is not recognized as an internal or external command,
operable program or batch file.
npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! bey-slay@0.1.0 start: `react-scripts start`
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the bey-slay@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\imcke\AppData\Roaming\npm-cache\_logs\2021-05-02T14_50_37_378Z-debug.log

D:\[Dearest_Lord_God,_please_intuitively_reveal_the_things_that_used_to_baffle_me]\[Projects-React]\bey-slay>

【问题讨论】：

你之前做过 npm install 吗？
您试图解决什么审计问题？

标签： node.js reactjs npm

【解决方案1】：

请确保您已安装 react-scripts (npm i react-scripts)。

如果您刚刚下载了完整的 react 项目，请在运行 npm start 之前运行 npm install。如果它仍然无法正常工作，您可能还需要安装开发依赖项（react-scripts 是开发依赖项）npm install --only=dev

【讨论】：