When comparing Quasar Framework vs Fit.UI - Object Oriented UI framework, the Slant community recommends Quasar Framework for most people. In the question“What are the best open source JavaScript GUI/widget frameworks? ” Quasar Framework is ranked 5th while Fit.UI - Object Oriented UI framework is ranked 14th. The most important reason people chose Quasar Framework is:
Vue 3.x available as a plugin.
Specs
Ranked in these QuestionsQuestion Ranking
Pros

Pro Uses Vue.js 2.0
Vue 3.x available as a plugin.
Pro Good documentation and coding samples
Pro Massive suite of well test & optimized widgets
Instant rebuild for SPA, PWA, Cordova or Electron with Material/iOS Themes.
Pro Designed from the outset for desktop & mobile
Pro Can build/test your PWA with/without PWA wrapper
Pro Supports server side rendering (SSR) like Nuxt + SSR/PWA
"Icon genie" builds app icons and splash images for platforms selected.
Pro Ability to add custom server side code when using SSR
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.
Cons
Con Developed by a single person
Statistically, apps being developed by a single person can be gone without warning.
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.
