fs.watch(filename[, options][,listener]) blog

In this tutorial we will be going over the watch() function

fs.watch(filename[, options][,listener])

This functions has three arguments first is the file name
 Ex
fs.watch("text.txt"[, options][,listener])

The second argument is the optional, provide a string to specifiy encoding otherwise the option should be an object
Ex
fs.watch("text.txt",  obj, [listener])

Lastly the listener argument represents a callback with two arguments. the eventType, and the filename. The eventType is either rename or change depending on the event, and the filename represents the file that triggered the event.