I starting learn java framework spring and build modern web-application, but at this moment I dont want use any JS frameworks. In documentation I found two options thymeleaf and WebMvcConfigurer with JSTL. Which one is more useful and will allow me to understand angular syntax easier in the future?
It depends on what type of web-application you are planning on creating. If you are just starting out I would go with Thymeleaf as it is has much more modern server-side features compared to using just JSTL. You can also read more about the setup process for thymeleaf using their documentation and integrating it with spring.