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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.
A VAST Transformer that is written in Typescript and can be deployed either as a service or using a server-less approach as for example as an AWS Lambda. The source code is released as open source.
Instead of having the Ad inserter to fetch the VAST XML directly from the Ad server it will instead fetch it from the VAST transformer proxy. It provides the original Ad server endpoint as an URL encoded query parameter together with an URL encoded query parameter pointing to where the XSLT to apply is available. As an example let us use our Test Adserver where you can get a VAST XML with the following URL.