install from npm's website

npm init -y 
npm install -D onsave

install from git hub

npm init -y
npm install -D https://github.com/onsave/onsave.git

Choose a command, and choose a file.

To set the command up as a save event listener on your chosen file enter the command.

npx onsave yourFile your command

now each time you save yourFile the command your command will be executed.

If you run into any complications please document what happend, and create a github issue, and consider fixing the bug and sending a pull request!