Infinite Scroll Random Post (ISRP) is a FREE WordPress plugin which enables infinite lazy scrolling on each of the Posts in your website.
Get the free ISRP plugin from here.
Currently it's designed to work with every WordPress base theme. But if you would like to connect it with a custom template, it'll require a bit of touches.
Check the source code at GitHub.
What's the tech stack?
→ WordPress Core (PHP)
→ SCSS (CSS preprocessor)