A cross-platform file change monitor.
fswatch {{path/to/file}} | xargs -n 1 {{bash_command}}
fswatch {{path/to/file}} {{path/to/directory}} {{path/to/another_directory/**/*.js}} | xargs -n 1 {{bash_command}}
fswatch {{path/to/directory}} | xargs -n 1 -I {} echo {}
fswatch --event {{Updated}} {{path/to/directory}} | xargs -n 1 {{bash_command}}