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Playwright
Playwright is a framework for Web Testing and Automation. It allows testing Chromium, Firefox and WebKit with a single API.
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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.
Mocha can also run in the browser: https://mochajs.org/#running-mocha-in-the-browser. An alternative library that can also run in the browser is QUnit: https://qunitjs.com/. You can include both with
Playwright does front end testing including comparing screenshots against a reference, might be handy for graphics. https://playwright.dev/