Systems and methods embedding a guest module within an embedder module are disclosed. According to some aspects, an embedder module is executed at a computer. A request to access a guest module is received via the embedder module. The request comprises a tag in a programming language. The tag identifies the guest module. An event is provided, using information associated with the tag, to an executing instance of the guest module responsive to the request to access the guest module. Processing of the event at the executing instance of the guest module is signaled.