What is the history of the IIFE in JavaScript?

What is the history of the IIFE in JavaScript?

The IIFE, or Immediately Invoked Function Expression, became popular in the early 2000s. It was introduced to create a new scope in JavaScript, helping to avoid variable hoisting issues and polluting the global namespace.

Why was it necessary to create IIFEs?

IIFEs were necessary to encapsulate variables and functions, preventing them from being accessible in the global scope. This was crucial for modular programming and avoiding conflicts in larger codebases.

Can you give me an example of an IIFE?

Sure! Here's a simple example:

(function() {
    console.log('This is an IIFE!');
})();

This function runs immediately after it's defined.

How do IIFE compare to other JavaScript patterns?

IIFEs are similar to module patterns, as both aim to create private scopes. However, IIFEs are simpler and more straightforward, while module patterns can offer more structure and reusability.