IIFE: JavaScript's parentheses panic attack to stop one rogue variable from tanking your entire app and the founder's weekend

Immediately Invoked Function Expression, or IIFE, is a programming technique where a function is defined and executed immediately, without needing to be called separately. This approach provides encapsulation, keeping variables and logic private, and prevents conflicts with other parts of the code. IIFE is used to avoid polluting the global scope, creating isolated modules, and executing initialization code once. It is defined by wrapping a function in parentheses and invoking it immediately with a second pair of parentheses. For example, a simple IIFE can log a message to the console, demonstrating its ability to create a new scope for variables. This technique is useful in programming to avoid variable hoisting and is a good practice to follow. By using IIFE, developers can keep their code organized, avoiding accidental modification of global variables and ensuring a cleaner global scope. This technique is significant in the programming industry, particularly in JavaScript development.