I designed and built this stacked modal pattern so we could have modular, reusable modals for specific pieces of info. This example uses it to add a new API authorization to an endpoint. It also allows us to keep modals concise and focused while also keeping spacial awareness through the app. We use this pattern very sparingly. The prototype shown here has multiple modals to test that the component can successfully accept any number of child modals but in practice, there would likely only ever be one stacked modal.
Client: Voxie
More: https://voxie.com