Javascript anonymous functions

In JavaScript, an anonymous function is a function that doesn't have a specified name. Instead of being declared with a name, it's typically assigned to a variable or passed as an argument to another function.

Anonymous functions

Anonymous functions are also known as "function expressions." They are used extensively for various purposes, including callbacks, event handlers, and more.

Here's how you can create and use an anonymous function in JavaScript:

// Anonymous function assigned to a variable const add = function(x, y) { return x + y; }; // Using the anonymous function const result = add(5, 3); // Returns: 8 // Passing an anonymous function as a callback setTimeout(function() { console.log("Delayed message"); }, 1000);

In the above example, the add variable is assigned an anonymous function that calculates the sum of two numbers. Later, the anonymous function is invoked as add(5, 3) to compute the result. Additionally, an anonymous function is used as a callback in the setTimeout function to execute a delayed action.


Anonymous functions are particularly handy when you need a function for a specific task and don't require reusability across different parts of your code. They are especially useful in scenarios where you want to define functions inline or pass functions as arguments to other functions without explicitly naming them.