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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.
From the Reddit thread [0] -
Github repo: https://github.com/PeterTYLiu/toaster
Every part of the model is an HTML element with CSS 3D transform functions; there're no WebGL or canvas shenanigans!
The editing tools are only available on desktop, and performance will be passable at best (nearly unusable on Safari), but that's what happens when you push browser engines to their limits lol. If you find any bugs that aren't already listed in the repo issues, feel free to create new issues.
[0]: https://old.reddit.com/r/webdev/comments/13nc54m/i_made_a_3d...