① Install node.js suitable for your own system.
Download address: https://nodejs.org/en/download
After downloading, double-click to run, and then continue to next, waiting for the installation to be successful.
Press the win+R key, enter "cmd" and press Enter, and enter in the pop-up command line window: npm --version
The version information appears to prove that the installation was successful:
②Create a new folder
Find the installation directory of node.js, and create two new folders, node_global and node_cache.
They are the default installation directory and cache log directory respectively.
③Set the npm download directory
use:
npm config set prefix "C:\Program Files\nodejs\node_global"
npm config set cache "C:\Program Files\nodejs\node_cache"
The command points the npm module directory and cache directory to the two folders in the second step, remember to replace the path with the path of your computer.
④ Set environment variables.
Right-click "My Computer", "Properties" - "Advanced System Settings" - "Advanced" - "Environment Variables" to enter the Environment Variables dialog box.
In the path of user variables in this step, you need to delete the default C :\APPData\Roaming\npm first, and then add the following two paths.
⑤ Configure mirroring
Modify the warehouse address of the npm command to Taobao mirror source.
Enter in the command line window: npm config set registry https://registry.npm.taobao.org
Then enter: npm config list to check whether the configuration is successful.
⑥Install vue.js
Enter in the command line window: npm install vue -g
The following error may occur in this step: Error: EPERM: operation not permitted, mkdir
At this time, you need to find the folder in the picture, right-click [Properties]-[Security]-[Edit], and modify the user's permissions to full control.
Successful installation:
可以使用：npm info vue命令查询安装的vue信息
⑦安装脚手架。
使用：npm install vue-cli -g命令安装脚手架。
安装成功后可以使用vue -V命令查看到vue的版本。
如果提示“vue不是内部或外部命令，也不是可运行的程序或批处理文件”，可以尝试将命令行窗口重启，或检查环境变量的配置（第四步）。
至此，vue环境安装完成。
后续步骤
创建vue项目并运行的后续步骤，请阅读：http://t.csdn.cn/TEJn5