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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.
jestPuppeteer.debug() as in the documentation (on GitHub) suspends test execution and allows you to see what's going on in the browser. It uses the jestPuppeteer.debug() method which enables you to pause the tests to inspect the browser.
page.$() is used to select the HTML element using it CSS selector. This returns an ElementHandle(represents an in-page DOM element) which is then used by page.evaluate() to get access to the innerHTML of that Element.
Jest is a Javascript testing framework that helps to ensure that our Javascript code-base is correct. It is a great testing library that requires little configuration.