Lui.Dropdown

A select control with a trigger and a pop-down list. The open state is controlled, so pass a bool and an open-change callback (typically a LuiSignal<bool>):

Lui.Dropdown(
    classes,                                  // IReadOnlyList<LuiOption> or string list
    selectedClass.Value,
    value => selectedClass.Value = value,
    classOpen.Value,
    open => classOpen.Value = open,
    "w-64",
    placeholder: "Choose a class")

The list opens below the trigger, and automatically flips above it when there isn’t enough room below (so a dropdown near the bottom of the screen stays on-screen). It closes when an option is chosen.