What is Immediately Invoked Function Expression - IIFE

IIFE is a function expression that automatically invokes after completion of the definition

const hello = 'Hello';
const to = 'World';
(function () {
  const to = 'Peter';
  console.log(`${hello} ${to}`);
})();

Output:
Hello Peter

Advantages of IIFE:

• 1. Do not create unnecessary global variables and functions
• 2. Functions and variables defined in IIFE do not conflict with other functions & variables even if they have same name.
• 3. Organize JavaScript code.
• 4. Make JavaScript code maintainable