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kotlinlang

Just declare extension function for that:
```
fun Any.hasOwnProperty(property: String): Boolean {
    return asDynamic().hasOwnProperty(property) == true
}
```

`hasOwnProperty` always returns boolean, no need to `== true`

It's to get rid of warning about autocast from dynamic to Boolean

You could also use `.unsafeCast&lt;Boolean&gt;()`. This should yield no warnings and no extra code.

<@U2T92KXP0> how is that better than `== true`? Seems like more code to me…

Probably Anton means that there is less code in compiled JS file (no additional bool check)
But  it fits nicely with code style for nullable booleans. Not the same of course, just looks natural for me after work with nullable booleans

That’s fair :slightly_smiling_face:
Thank y’all for the help!