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kotlinlang

<@UFC7B9QPM> something like `js("typeof window !== undefined") as Boolean`

yeah that's what i tried to avoid :smile:

why not just:
```
if (window != undefined) {
}
```

<@UFC7B9QPM> Alternatively you can do it with `jsTypeOf(window) == "undefined"`.
<@UFT11FKSP> Accessing undefined variable will result in a `ReferenceError`.

So why this is working fine?:
```
if (window.asDynamic().blah == undefined) {
}
```

JavaScript :man-shrugging:. It's not an error to access undefined property.

`window != undefined` is translated as `!Kotlin.equals(window, undefined)` and from I can see in  the sources this function should work fine for undefined `window`

Try typing `window;` statement in node.js console.

<@UAZ8LS9KJ> `jsTypeOf` lloks great, thank you :slightly_smiling_face: