Component UI libraries have converged towards providing the most basic building blocks instead of creating higher levels of abstraction, which I personally think is a bad trend.
You could build a very complex UI with Ext.JS back in 2010 with a lot less code and very little time, while it takes a while lot more work to produce even something relatively basic with modern UI frameworks.
I really don't care about how customizable your spinner is. I want to use it in common contexts with as little code as possible. Heck, at least provide me with a kitchen sink so I can copy and paste common patterns.
You could build a very complex UI with Ext.JS back in 2010 with a lot less code and very little time, while it takes a while lot more work to produce even something relatively basic with modern UI frameworks.
I really don't care about how customizable your spinner is. I want to use it in common contexts with as little code as possible. Heck, at least provide me with a kitchen sink so I can copy and paste common patterns.