用npm安装express时报proxy的错误的解决方法

首先要说明一点：当使用npm install <module-name>时安装组件时，安装的目录是cmd的目录+node_modules+组件名

例子如下：假如你现在安装express这个组件：

cmd的目录是：D:Program Files odejs ode_modules pm

如图所示：

则：express这个组件的目录在：D:Program Files odejs ode_modules pm ode_modulesexpress

在执行上述命令时喜欢报的错误是：

7 error network request to https://registry.npmjs.org/npm-server failed, reason: connect ETIMEDOUT 151.101.112.162:443
18 error network This is a problem related to network connectivity.
18 error network In most cases you are behind a proxy or have bad network settings.
18 error network
18 error network If you are behind a proxy, please make sure that the
18 error network 'proxy' config is set properly.  See: 'npm help config'
19 verbose exit [ 1, true ]

上述的错误其实就是网络代理出现问题：如果你没有使用任何代理

请先输入命令npm config set proxy=null

如果你用了代理写上你自己的代理即可： npm config set proxy=http://135.245.115.111:8000

然后再写上命令npm install express即可