Hands-On Data Structures and Algorithms with JavaScript

Modularization of code

When we create a script, it is obvious that we want it to do multiple things, for example, if we have a login page, the script for the login page should handle login (obviously), reset a password, and signup. All of these operations would require the email validation. Keeping validation part of each of these operations in its own method is known as Modularization. It helps us keep our methods small, readable, and makes unit testing a lot easier.