NPM 多次安装错误

Question

当我尝试安装 npm 时，控制台会给出以下错误和警告：

npm WARN checkPermissions Missing write access to C:\Users\Aristophanes\node_modules\web3
npm WARN ajv-keywords@2.1.1 requires a peer of ajv@^5.0.0 but none is installed. You must install peer dependencies yourself.
npm WARN eslint-config-react-app@2.1.0 requires a peer of babel-eslint@^7.2.3 but none is installed. You must install peer dependencies yourself.
npm WARN eslint-config-react-app@2.1.0 requires a peer of eslint@^4.1.1 but none is installed. You must install peer dependencies yourself.
npm WARN eslint-loader@1.9.0 requires a peer of eslint@>=1.6.0 <5.0.0 but none is installed. You must install peer dependencies yourself.
npm WARN eslint-plugin-jsx-a11y@5.1.1 requires a peer of eslint@^2.10.2 || ^3 || ^4 but none is installed. You must install peer dependencies yourself.
npm WARN firebase-functions@2.1.0 requires a peer of firebase-admin@~6.0.0 but none is installed. You must install peer dependencies yourself.

npm ERR! path C:\Users\Aristophanes\node_modules\web3
npm ERR! code ENOENT
npm ERR! errno -4058
npm ERR! syscall access
npm ERR! enoent ENOENT: no such file or directory, access 'C:\Users\Aristophanes\node_modules\web3'
npm ERR! enoent This is related to npm not being able to find a file.
npm ERR! enoent

npm ERR! A complete log of this run can be found in:
npm ERR!     C:\Users\Aristophanes\AppData\Roaming\npm-cache\_logs\2018-11-02T23_13_12_948Z-debug.log

有谁知道我该如何解决这个问题？谢谢。

Answer 1

尝试删除C:\Users\Aristophanes\node_modules\web3 中的web3 文件夹以及项目目录中的node_modules 文件夹（如果存在）。希望对你有帮助:)

Answer 2

有两种解决方案。

**1. Reinstall npm with a Node version manager (recommended).**

这是避免权限问题的最佳方法。有关更多信息，请参阅此链接 (https://docs.npmjs.com/getting-started/installing-node#using-a-version-manager-to-install-nodejs-and-npm) 在安装 Node 版本管理器之前，您无需删除当前版本的 npm 或 Node.js。

**2. Change npm's default directory manually.**

如果您不使用 Windows，可以使用以下步骤。

To minimize the chance of permissions errors, you can configure npm to use a different directory. In this example, it will be a hidden directory on your home folder.

Back-up your computer before you start.

Make a directory for global installations:

mkdir ~/.npm-global

Configure npm to use the new directory path:

npm 配置设置前缀 '~/.npm-global'

Open or create a ~/.profile file and add this line:

导出 PATH=~/.npm-global/bin:$PATH

Back on the command line, update your system variables:

来源 ~/.profile

测试：不使用 sudo 全局下载包。

npm install -g jshint

您可以使用相应的 ENV 变量来代替步骤 2-4（例如，如果您不想修改 ~/.profile）：

 NPM_CONFIG_PREFIX=~/.npm-global