Managing Node.js Versions With Homebrew

TL;DR Manage Node.js versions with Homebrew by using brew link and brew unlink:

$> node -v
v9.5.0
$> brew unlink node
$> brew link --force node@8
$> node -v
v8.9.4

Although you can use dedicated tools to manage your Node.js versions, I’ve got by just fine using Homebrew’s link and unlink commands:

Homebrew’s node package points at the latest version of Node.js. You can find out exactly which version by running brew info node:
```
$> brew info node
node: stable 9.5.0 (bottled), HEAD
...
```
Install node using brew install node
Homebrew formulae are available for prior versions of Node.js and follow the node@<version> naming convention. You can see exactly which version of Node.js a formula points to by using the info command:
```
$> brew info node@8
node@8: stable 8.9.4 (bottled), HEAD [keg-only]
...
```
Install node@8 using brew install node@8

With node and node@8 installed we can switch between them like so:

$> node -v
v9.5.0 # <- node is pointing at the node formula
$> brew unlink node
$> brew link --force node@8 # --force required as node@8 is a keg-only formula
$> node -v
v8.9.4 # <- node now points at the node@8 formula

To change back to the latest Node.js, just do the opposite to what we’ve just done:
```
$> brew unlink node@8
$> brew link node
$> node -v
v9.5.0
```