The 'use strict' mode is a feature in JavaScript that enables stricter parsing and error handling in your code.
When you use 'use strict' at the beginning of a script or a function, it enables a stricter set of rules for JavaScript code.
This can help you write cleaner and more secure code by catching common coding mistakes and preventing certain actions that are considered unsafe.
Some of the key features of 'use strict' mode include disallowing the use of undeclared variables, eliminating the use of 'this' keyword in global scope, and preventing duplicate property names in objects.
It is recommended to use 'use strict' mode in all your JavaScript code to ensure better code quality and avoid common pitfalls.