What impact do the rounded edges of the iPhone X have on hybrid apps with bottom toolbars or tabs?

According to the IOS developer website, the UI elements provided by Apple automatically adapt to the new layout that comes with the new phone. Therefore a browser app should also be working fine without leaving essential buttons half cut off behind the rounded corners. But what about hybrid apps that run in a Cordova container? How do they adapt to the new shapes of the iPhone screen?

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