We had a chance to use GWT in our internal Hackathon and here are our impressions and feedbacks for GWT / J2CL / Java development on the Web Browser.
The Task: build a simple UI frontend web app which just shows other web apps contents (micro frontends with HTML, JS). So it is just like building a portal (main frontend UI) with some portlets (micro frontends). If you don’t know what it is check out my article: From Portlets to OpenSocial Gadgets to Progressive Web Apps. We chose Material Design for the UI design.