Histogram function in JavaScript

histogram.js

/***
* Histogram "bins" numbers in the array X in to group ranges. 
* Example usage histogram([1,5,2,4,2,5,2,3,1], 2) would return back [5,2,2] where bin ranges are [1-2, 3-4, 5-6] as bin range is 2
* Example usage histogram([1,5,2,4,2,5,2,3,1], 1) would return back [2,3,1,1,2] where bin ranges are [1,2,3,4,5] as bin range is 1
*/
function histogram(X, binRange) {
  //inclusive of the first number  
  var max = Math.max(...X);
  var min = Math.min(...X);
  var len = max - min + 1;
  var numberOfBins = Math.ceil(len / binRange);
  var bins = new Array(numberOfBins).fill(0);
  //-min to normalise values for the array
  X.forEach((x) => bins[Math.floor((x-min) / binRange)]++);
  return bins;
}