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mixitup
A high-performance, dependency-free library for animated filtering, sorting, insertion, removal and more
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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.
If you have access to, or are able to create, a JSON output listing the pieces of each dataset you'd like to be searchable, as well as an image, title, and URL for each, then you can incorporate a platform-agnostic search tool with advanced features such as Twitter's Bloodhound.
But I digress again, if you'd rather finish this thing right now I think google or someone else here might be a better help than I as I haven't built custom platform-agnostic search in about 5 years so I'm not sure what's out there besides Bloodhound (the last thing I used to make custom search). If you can boil it down to a more filter-style search where the user can pick from some fixed number of topics, then something like Mixitup or Quicksand is pretty cool. But it sounds like you need something less rigid than that. Whatever you set up is very likely gonna take some custom work and probably a decent amount of JavaScript know-how.