Ranked in these QuestionsQuestion Ranking
Pro Completely free and open source
Most UI frameworks seems to be really limited or cost money. Fit.UI is actually quite comprehensive and licensed under LGPL which means you can use it for any kind of project - commercial, personal, or open source.
Pro Full intellisense for JS and TypeScript in Visual Studio Code
You never have to look look up the names of functions - Visual Studio code just lists all the possible functions available on a given Fit.UI object.
Pro NPM package available
It can easily be installed through npm:
npm install fit-ui.
Pro Enhances productivity
You can create a fairly complex app in little time from scratch using Fit.UI.
Con Not as much third-party resources available
Since it's not as popular as other libraries there are not as many third-party resources like plugins or tutorials available.