An approach to creating a canonical representation of a JavaScript API. Objects associated with the JavaScript API are instantiated, creating entry points for analysis. A list of discovered objects is created based on parsing a document object model associated with the JavaScript API. The objects are instrumented and statically analyzed, creating an infrastructure associated with the JavaScript API. The infrastructure is updated based on analyzing the objects while the interface is being used and the objects are executing. A canonical representation, based on the updated infrastructure, is generated for further operations.