vue项目安装依赖包，报错如下：
$ npm install npm WARN registry Using stale data from https://registry.npmjs.org/ because the host is inaccessible -- are you offline? npm WARN registry Using stale data from https://registry.npmjs.org/ due to a request error during revalidation. npm WARN deprecated core-js@2.6.11: core-js@<3 is no longer maintained and not recommended for usage due to the number of issues. Please, upgrade your dependencies to the actual version of core-js@3. npm WARN deprecated fsevents@1.2.13: fsevents 1 will break on node v14+ and could be using insecure binaries. Upgrade to fsevents 2. npm ERR! code ENOTFOUND npm ERR! errno ENOTFOUND npm ERR! network request to https://registry.npmjs.org/vue-router/-/vue-router-3.3.4.tgz failed, reason: getaddrinfo ENOTFOUND registry.npmjs.org registry.npmjs.org:443 npm ERR! network This is a problem related to network connectivity. npm ERR! network In most cases you are behind a proxy or have bad network settings. npm ERR! network npm ERR! network If you are behind a proxy, please make sure that the npm ERR! network 'proxy' config is set properly. See: 'npm help config' npm ERR! A complete log of this run can be found in: npm ERR! /Users/luminal/.npm/_logs/2020-07-03T04_12_04_809Z-debug.log解决方式：
$ npm config get proxy null $ npm config get https-proxy null $ npm config set proxy null $ npm config set https-proxy null $ npm config set registry http://registry.cnpmjs.org/ $ npm install -g cnpm --registry=https://registry.npm.taobao.org npm WARN deprecated request@2.88.2: request has been deprecated, see https://github.com/request/request/issues/3142 /Users/luminal/.nvm/versions/node/v10.16.0/bin/cnpm -> /Users/luminal/.nvm/versions/node/v10.16.0/lib/node_modules/cnpm/bin/cnpm + cnpm@6.1.1 updated 5 packages in 12.316s $ cnpm i bash: cnpm: command not found $ cnpm install bash: cnpm: command not found $ nvm use v10.16.0 Now using node v10.16.0 (npm v6.9.0) $ cnpm i ⠧ [6/23] Installing uniqs@^2.0.0 WARN node unsupported "node@v10.16.0" is incompatible with babel-loader@7.1.5 › webpack@3.12.0 › watchpack@1.7.2 › watchpack-chokidar2@^2.0.0, expected node@<8.10.0 ✔ Installed 23 packages ✔ Linked 750 latest versions之前使用 nvm 对 node 版本进行了管理，需要指定一下版本：nvm use v10.16.0
而后使用 cnpm i 或 cnpm install
参考链接：
npm安装任何包都报错的解决办法
