Ask HN: One Single Framework for Developing Mobile, Web and Desktop App?

Considering the amount of expertise each of the framework requires for developing applications, it becomes cumbersome & time consuming to learn many. Is there any single framework out there which can do all the things? We have separate framework for developing application depending on the platform. Something using which one can develop code for all platform - Microservices are good & it's completely ok to build separate microservices too for each platform but is there any single framework which does all of it and have library for the same?