"Prefer dedicated libraries to monolithic frameworks", this is the money quote for me. I got burned a long time ago when I wrote a large personal project using

"Prefer dedicated libraries to monolithic frameworks", this is the money quote for me. I got burned a long time ago when I wrote a large personal project using ExtJS (~1.2 i think). Breaking changes, coupled with a kitchen sink mentality soured me against large frameworks. It's vanilla JS with a few small very targeted libraries to fill in the gaps from now on for me.