IIFE
IIFE (Immediately Invoked Function Expression) is a JavaScript design pattern where a function is defined and executed immediately after its creation. It creates a private scope to avoid polluting the global namespace and can be used to initialize code or manage variable encapsulation. This pattern is commonly employed in modular JavaScript development to prevent conflicts with other scripts.
Developers should use IIFE when they need to execute code immediately upon script load, such as for initialization tasks or to create isolated scopes that protect variables from global interference. It is particularly useful in older JavaScript environments without native module systems (like ES6 modules) to implement modular patterns and avoid naming collisions in large applications.