When comparing Deku vs Syncfusion JavaScript UI Controls, the Slant community recommends Deku for most people. In the question“What are the best JavaScript libraries for building a UI with data binding support?” Deku is ranked 9th while Syncfusion JavaScript UI Controls is ranked 12th. The most important reason people chose Deku is:
Functional approach.
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Pros
Pro Functional
Functional approach.
Pro Server side rendering
Deku can render it's components and data server side, then it sends those components as HTML to the browser.
This ensures faster initial loading time and SEO friendliness out of the box, since it's indexed as any other static website by search engines.
Pro Easy to learn
Since Deku is very lightweight and has a rather small API, there's not much to learn. It's pretty easy to get started and build something with it.
Pro Can use JSX
Developers using Deku can choose to also use JSX if they want to. This is especially helpful for people who are moving from React to Deku.
Pro Good performance
Deku's diffing algorithm is considerably faster and performs better than most libraries. The dbmonster performance mini-app written in Deku renders roughly 16% faster than other libraries.
Pro Modular and written fully in TypeScript
All components have been built as modules to enable selective referencing, so only the components and features you need are included in your application.
Pro Responsive and Touch friendly
All controls are touch friendly and render adaptively based on the device they are on to provide optimal usage experience on phones, tablets and desktops.
Pro Built-in themes
All 4 major themes are available such as Google's Material, Bootstrap, High contrast and Office 365's Fabric themes.
Pro Fast release cycle
4 major releases per year and weekly patch release.
Pro Free community license
Cons
Con No support for legacy browsers
Deku does not support legacy browsers, or relatively old browsers for that matter. They only support the latest versions of the major web browsers.
Con Not a lot of learning resources
Since it's a rather new library and has a small community, there are not many examples where you can learn from out there. There are also few guides and the documentation is not amazing and has some parts that should be covered better.