How to Create an Anonymous Self-Executing Function in JavaScript?

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To create an anonymous self-executing function in JavaScript, also known as an Immediately Invoked Function Expression (IIFE), you can wrap your code in a function expression and immediately call it using parentheses. Here’s an example code snippet that demonstrates how to create an anonymous self-executing function in JavaScript:

(function() {
  // Your code here
  console.log("Hello, world!");
})();

In this code, a function expression is created and immediately called using parentheses. The function has no name, so it is anonymous.

Inside the function, your code can be placed, such as a console.log statement that outputs “Hello, world!”.

When the JavaScript interpreter encounters this code, it immediately invokes the function and executes the code inside it.

This pattern is often used to create a private scope for your code, preventing variables and functions defined inside the IIFE from polluting the global namespace. Additionally, this pattern can be used to create modules, which are self-contained pieces of code that expose a public API for other parts of your application to use.

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