round-to-nearest.js

/**
 * Round the given number to the nearest incrementation of the provided stepper.
 */
const roundToNearest = function(number, nearest) {
  const rounded = number + nearest/2 - (number+nearest/2) % nearest;

  return rounded;
};

const nearest = 0.25;

console.log(roundToNearest(0.28, nearest)); // > 0.25
console.log(roundToNearest(0.44, nearest)); // > 0.50
console.log(roundToNearest(44, 3));         // > 45