OSX上管理多个版本的Nodejs，并且随意切换

Nodejs的项目经常Node自身的版本不同而无法运行，如果每次都选择卸载掉一个版本的Nodejs再安装另外一个版本的Nodejs，会很费劲，通过如下命令切换。

例如：

# For example

# Install main node version 18
$ brew install node@18


# Add the main version to ~/.zshrc to make started
# (~/.bash_profile if you're using default shell)
$ echo 'export PATH="/usr/local/opt/node@18/bin:$PATH"' >> ~/.zshrc

# Execute updated  
$ source ~/.zshrc

# Check version of installed node
$ node -v
v18.12.1

### Want to witch to node version 14
$ brew install node@14

# Check version of installed node
$ node -v
v14.17.2

# Unlink main node version 18
$ brew unlink node

# Link node version 14
$ brew link node@14

　　参照：https://medium.com/@fucyber/manage-multiple-node-versions-with-homebrew-and-nvm-2c72d98a9f5a