To get a random number is JS you almost always rely on the function Math.random. The only issue is that it returns a number between 0 and 1.

You can generate a number in a specific range by writing a straightforward function.

function getRandomNumberInRange(min, max) {
  return Math.random() * (max - min) + min;

The function getRandomNumberInRange returns a random number between min (inclusive) and max (exclusive).