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>), plus a caller-owned LuiRef (declare it as a field) used to anchor the list:

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

The list renders through the overlay layer (Lui.Portal), so it draws above all other content and is never clipped by a surrounding overflow-hidden/Lui.Scroll