Hello community, I'm trying to work with multiple dropdown, the 1st dropdown is supposed to copy all the value in 3 other dropdown however I only manage to find a solution in a single one.
Here's the code I tried:
var select1 = document.getElementById("dropdown1");
var select2 = document.getElementById("dropdown2");
select1.onchange = function() {
  // empty select2
  while (select2.firstChild) {
    select2.removeChild(select2.firstChild);
  }
  if (select1.selectedIndex == 0) {
    return;
  }
  for (var i = select1.selectedIndex; i < select1.options.length; i++) {
    var o = document.createElement("option");
    o.value = select1.options�i].value;
    o.text = select1.options�i].text;
    select2.appendChild(o);
  }
}

Output: