Calculate depth of array

depthOfArrayExample.js

const arr = [[["blah", 876, true], [3, 23, 56], ["hjdfhkjhk", false, -1]]];
const arr1 = [["blah", 876, true], [3, 23, 56], ["hjdfhkjhk", false, -1]];
const arr2 = [[["blah", 876, true], [[98728713,918723987,1283787],3, 23, 56], [[98728713,918723987,1283787],"hjdfhkjhk", false, -1]]];
const arr3 = [[["blah", 876, true], [[98728713,[2376,81727],918723987,1283787],3, 23, 56], [[98728713,918723987,1283787],"hjdfhkjhk", false, -1]]];
const arr4 = [[["blah", 876, true], [[[[[98728713,918723987,1283787],3, [1263876,["sdhjh",[12,true,[12873,8273,128],94853],23, 56]]], [[98728713,918723987,1283787],"hjdfhkjhk"]]], false, -1]]];

const getDepthOfArray = (arr) => {

  let depth = 0;
  let included = [];

  const checkDepth = (arr, included, level) => {
    if (Array.isArray(arr)) {
      depth++;
      included[level] = true;
      checkDeeper(arr, included, level+1)
    }
  };

  const checkDeeper = (arr, included, level) => {
    for (var i = 0; i < arr.length; i++) {
      if (Array.isArray(arr[i])) {
        if (!included[level]) {
          depth++;
          included[level] = true;
        }
        checkDeeper(arr[i], included, level+1);
      }
    };
  };

  checkDepth(arr, included, 0);
  return depth;
}

console.log(getDepthOfArray(arr));
console.log(getDepthOfArray(arr1));
console.log(getDepthOfArray(arr2));
console.log(getDepthOfArray(arr3));
console.log(getDepthOfArray(arr4));