In JavaScript, the sort() method is used to arrange the elements of an array in ascending order by default. The basic syntax is: array.sort(); However, the sort() method can also take a compare function as an argument to define a custom sorting order. The compare function should return a negative, zero, or positive value, depending on the desired sorting order. Here's an example of using sort() with a compare function to sort numbers in descending order: let numbers = [3, 1, 4, 1, 5, 9, 2, 6, 5, 3, 5]; numbers.sort(function(a, b) { return b - a; }); console.log(numbers); // Output: [9, 6, 5, 5, 5, 4, 3, 3, 2, 1, 1] In this example, the sort() method is used with a compare function that subtracts b from a, resulting in a descending order.