First post about React! I'm new and I try to make a cascading dropdowns (3 levels) with each of one having the same values (same source). There's other functions to validate duplicates selection, but that's not the point of my question. When I select element, it works; the array "levels" is filled, the disabled attribute works, and so on. But when I try to clear all values, the dropdowns (2nd & 3rd) are disabled, but value are displayed.