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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.
Koa is written by original creators of express - is it good or bad? :) Any other framework supports promises By looking into https://koajs.com/ I can't see no similarities to express or other frameworks, it's completely unique. Instead of req.send(data) in express or return data in fastify it is ctx.body = data in koa.
Last stable version of Express was released years ago! They do have an alpha version of 5.0.0 up on NPM, published just 1 year ago, but that one seems to be dead, as no commits were made to the Github 5.0 branch in 15 months.