Hello, I'm trying to add <https://developer.mozilla.org/en-US/docs/Web/API/Intersection_Observer_API...

# compose-web

[Tomáš Hubálek]

Hello, I'm trying to add https://developer.mozilla.org/en-US/docs/Web/API/Intersection_Observer_API into our JetPack Compose for Web app. Any idea how to do that will least pain?

AFAIK IntersectionObserver is not available via kotlinx.browser classes. So should i use js() to all the stuff?

[Oleksandr Karpovich [JB]]

I think you can try to use external modifier https://kotlinlang.org/docs/js-interop.html#external-modifier

it's possible to use js() anyway. But maybe you would prefer external

[Tomáš Hubálek]

Ok, thanks for suggestion.

So when i use external, I have to map that class and all classes it uses (IntersectionObserverEntry and all classes that it uses for its properties).

Right?

[Tomáš Hubálek]

Wow, it works. I'm amazed how easy it was. Thanks.

[Big Chungus]

Also you can chop off typesafety with dynamic type

[Big Chungus]

So you'd only have to define types for things that you actually use and ignore the rest

[Tomáš Hubálek]

I found I can do that even with type safety. I mapped only those methods and properties from the class I need for my purposes.

[Big Chungus]

I meant cases where you only need the property but not its type hierarchy