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SurveyJS
Open-Source JSON Form Builder to Create Dynamic Forms Right in Your App. With SurveyJS form UI libraries, you can build and style forms in a fully-integrated drag & drop form builder, render them in your JS app, and store form submission data in any backend, inc. PHP, ASP.NET Core, and Node.js.
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react-query
Discontinued 🤖 Powerful asynchronous state management, server-state utilities and data fetching for TS/JS, React, Solid, Svelte and Vue. [Moved to: https://github.com/TanStack/query]
speccards generates random valid UI states based on a spec
You can browse the source code (and it particular the hooks folder) over here https://github.com/frankiesardo/firebuzz.
React Query obviously stands out with its incredible DX. It works with http, graphql and any asynchronous behaviour really (e.g. IndexedDB).