/**
   * Filter items in range
   * @param {number[]} arr - numbers to filter
   * @param {number} a - min range limit
   * @param {number} b - max range limit
   * @returns {number[]}
   */
  function filterRange(arr, a, b) {
    /** @type {number[]} */
    var cloneArray = [];

    for (var i = 0; i < arr.length; i++) {
      if (arr[i] >= a && arr[i] <= b) {
        cloneArray.push(arr[i]);
      }
    }
    return cloneArray;
  }

  var arr = [5, 4, 3, 8, 0];
  var filtered = filterRange(arr, 3, 5);

  alert(
   'Start array is \n' +
   arr + '\n\n' +
   'Filtered array is \n' +
   filtered);