Kotlin Standard Library Cookbook

How to do it...

1. Create a new kotlin file, AlertDialogApp.kt, that contains the main() function:

fun main(args : Array<String>) {}

2. Declare a reference to the JS alert() function:

fun main(args : Array<String>) {}external fun alert(message: Any?): Unit

3. Implement the showAlert() function and invoke it in the main() function:

fun main(args : Array<String>) {    showAlert()}fun showAlert() {    val number: dynamic = js("Math.floor(Math.random() * 1000)")    val message = "There were $number viruses found on your computer! \uD83D\uDE31"    println("showing alert")    alert(message)}external fun alert(message: Any?): Unit