Hello, i found a way to get the height every time app is resized.
i used customComponent, i'm not sure if the best way but it's working for me
i added a useEffect to check the viewport, i set viewport global variable in the model state to receive it in the component, the code is something like that:
React.useEffect(() => {
console.log({viewport:model.viewport})
window.top.postMessage({
type: 'resize',
viewport: model.viewport
}, '*')
}, [model.viewport])