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You’ve built apps with frontend frameworks before? - Then you surely came across the terms "declarative" and “reactive”. Every modern UI framework or library wants to be it, but what do these terms actually mean? And what’s the difference between “declarative” and “imperative” code? It took me a long while to grasp these sentence - but when I finally did, I saw frontend frameworks in a totally new light! And I hope you will feel the same after this talk. We’ll delve into a lot of code examples to deeply understand the terms - with examples using vanilla JavaScript, React and Svelte. But the learnings will be universal. After this talk you’ll be able to confidently join discussions about the "declarative" and "reactive" nature of any new package or library.