Pro Android with Kotlin

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CHAPTER 10: Development
Create the file Main.kt inside src/main/kotlinjs and add content to it as follows:
import kotlin.browser.document
fun main(args: Array) {
val message = "Hello JavaScript!"
document.getElementById("cont")!!.innerHTML = message
}
In the end we will be targeting a web site, so we need a first HTML page as well. Make it the 
standard landing page index.html, create it inside src/main/web, and enter the following: