What is IIFE in JavaScript?

IIFE stands for “Immediately Invoked Function Expression” in JavaScript. It is a self-contained function that is defined and executed immediately after its creation. IIFE is typically used to create a private scope for variables, preventing them from polluting the global scope.

An IIFE (Immediately Invoked Function Expression) is a function that runs the moment it is invoked or called in the JavaScript event loop. Having a function that behaves that way can be useful in certain situations. IIFEs prevent pollution of the global JS scope.