First, import the 'fs' module which provides file system-related functionality.
Use the 'fs.readdir' method to read the contents of a directory, and pass in the directory path and a callback function to handle the result.
Within the callback function, handle the error if one occurred, and if not, iterate through the list of file names and perform operations based on your filtering criteria.
Use the 'path.extname' method from the 'path' module to check the file extension.
Apply your filtering logic and store the filtered file names in an array or perform any other desired actions.
Finally, handle or utilize the filtered data as needed within your Node.js application.