Facebook React is the answer IMO. I used ExtJS heavily for years and identify with this post, I use React now and couldn't be happier. We had to build our own

Facebook React is the answer IMO. I used ExtJS heavily for years and identify with this post, I use React now and couldn't be happier. We had to build our own component library[1] (wrapping KendoUI widgets) but React makes it a breeze to take these primitives and build composites. https://github.com/wingspan/wingspan-forms https://github.com/wingspan/wingspan-forms