Add selection change listener to kotlinx dropdown option

I am building a Ktor application which should include a drop down menu. In this application I do respond to get requests from a ktor server with HTML, using ApplicationCall.respondHtmlTemplate.

I have a list of strings which should serve as the available options for users. I can easily add the strings to the drop down menu by creating an option for each string.

fun DIV.renderDropdown() {
    label() {
        select() {
            availableVersions.forEach {
                v ->
                option("",v)
            }
        }
    }
}

Somewhere else in my code I have a global variable which I want to change, whenever the selection in my dropdown menu is changed.

However I did not find any information whether I can just add a listener to the option which then sets my variable, or how you would something with the same effect here.

Ideally I would love to have something like

var o = option("", v)
o.addOnSelectionChangeListener({
    globalVariable = o.getSelectedItem()
}

How can you achieve something like this in ktor/kotlinx?