[Solved] How can instance an object of type dynamic without `js()` function? Code: ```external fun ...

# javascript

[frank]

[Solved] How can instance an object of type dynamic without js() function?

Code:

external fun require(module: String): dynamic
fun App() { 
  val Koa        = require("koa")
  val app        = Koa() //Dont work: Generate Koa() in JS script need new Koa() 
  val app        = js("new Koa()") // GOOD
}

Generate this:

var Koa = require('koa');
var app = Koa(); //BAD: i need new Koa() in JS script

[turansky]

@JsModule("koa")
external class Koa

fun App() {
    val app = Koa()
}

[turansky]

Yes 🙂

[turansky]

Fixed

[frank]

@turansky, Thx I have tried it and it works:

@JsModule("koa")
external class Koa
fun App() {
    val app = Koa()
}

Last question: I need the variable app to be dynamic to call js functions.
I tried this: Any Alternative?

val app:dynamic = Koa()
app.use()

[turansky]

@JsModule("koa")
external class Koa {
    fun use()
}

[frank]

Is very verbose, but ok.

[turansky]

val app = Koa().asDynamic()
app.use()

[frank]

better thx

[frank]

@turansky, You would advise against using external fun require (module: String): dynamic by @JsModule .

Official doc.: Says to use @JsModule but it says nothing about external fun require (module: String) .

[turansky]

require - low level api (block optimization in most cases)
@JsModule used for strict typization (loading mode - implementation details)

I real live both can be used (I use both), depends on your case
@JsModule in most cases

[turansky]

FYI - require can be configured by webpack loaders