In the situation where you have something like a shared header across multiple SPAs or domains, what strategies do you use?<p>In simpler terms, how do you do an iframe without using an iframe?<p>I'm roughly getting at the ideas described here[1], but wondering how people deal with it tactically as well as the interaction with front-end frameworks.<p>1: https://docs.microsoft.com/en-us/dotnet/standard/microservices-architecture/architect-microservice-container-applications/microservice-based-composite-ui-shape-layout