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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.
The last place our improvements touch on is visual page building. You can now create new pages in the Visual Editor and edit the page’s default data right away — with no build needed. We also added an option to preview your new page without a build. To get a preview, you’ll need pages configured to render from your front matter using Data Bindings and Previews (we also recommend Bookshop here). Then you can use the new option new_preview_url to set your preview to another page’s output URL. The Visual Editor will load that set preview URL and use the Data Bindings and Previews to render your new page without saving. You can try this with our Megakit template.