[ureech]

var fromStorage = localStorage.getItem('colorRow')
var slots = document.querySelectorAll('.slot:not(.less-today)')
if (fromStorage != null) {
  try {
    var ObgArr = JSON.parse(fromStorage)
    for (var j = 0; j < slots.length; j++) {
      var slot = slots[j]
      ObgArr.forEach((element, index) => {
        if (slot.dataset.slot == element.slot) {

          slot.innerHTML = element.summ // Вот тут нужно максимальное значение
        }

      })
    }
  } catch (e) { }
  }