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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.
Due to a bug that has existed in Jest since 2020, my team at work had to decide to either, fix the bug in Jest's repo.... or switch over to Vitest which doesn't have the bug. And since Jest's repo would require someone on our team to deal with a large Yarn mono repo, and TypeScript, it seemed like it might be worth it to avoid going that route.
With --no-isolate it was 2.8x faster than vitest and 1.7x faster than Jest, but 19 tests failed (see table above). Some people report issues with watch mode when using --no-isolate. So I decided to not pursue it any further. Once the vm module that Vitest relies on supports ESM, or when the amazingly named Shadow Realms are added to JavaScript, we will likely get this performance boost for free without the downsides.
Though newer repos we've started use this boilerplate. I would recommend it to everyone, for every project.