My element updates its options using the onclick() listener when clicked. The problem is the listener is firing when an option is clicked as well, so the user is unable to select anything in the updated list.

groupSelect.onclick = function() {
    PopulateList();
  }

I'd like to run my function only when the select element is clicked(when the menu has not dropped down yet) but not when a specific option is clicked. How can I do so? I'm writing the JS part using NodeJS.