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lazysizes
High performance and SEO friendly lazy loader for images (responsive and normal), iframes and more, that detects any visibility changes triggered through user interaction, CSS or JavaScript without configuration.
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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.
Lazy Loading: Defer loading of off-screen images until they are needed using lazy loading techniques. Utilize libraries like lazysizes or native browser lazy loading attributes.
Compress Images: Reduce file size while maintaining quality using image compression tools like TinyPNG or ImageOptim. Also, you can use Figma plugin: ExportX