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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.
BackstopJS is a framework that automates visual regression testing. This framework is written in JS and consists of the following tools:Puppeteer(headless chrome)+ ResembleJS(diff library). It uses a headless Chrome, in that way it's not actually opening up our Chrome browser and it's not taking screenshots that we can see. All we have to do is, write a script for simulating user scenarios and run backstopJS commands and it goes through and simulates user flows with headless chrome automatically. All we have to do is, run a simple command in the command-line tool so that it will take care of all the work for us.