Anonymous Function in JavaScript

An anonymous function is one that has no name. Anonymous functions can be sent as a parameter to other functions.

Example

let display = function() {
    console.log('This is anonymous function');
};

display();
}  

Output

This is anonymous function

The anonymous function in the preceding example has no name between the function keyword and the parentheses.

Anonymous functions as arguments

setTimeout(function() {
    alert('anonymous function');
  }, 1000);