Comment by breadwinner

You don't need a large framework to build a maintainable, efficient web app. Here's an example: https://github.com/wisercoder/eureka/tree/master/webapp

It uses two 500-line libraries:

This 500-line lib lets you use TSX syntax without React: https://github.com/wisercoder/uibuilder

This 500-line lib implements MVC routing: https://github.com/wisercoder/mvc-router