According to this post on the official V8 Javascript blog, the pseudo-random number generator (PRNG) that V8 Javascript uses in Math.random() is horribly flawed and getting replaced with something … ...

So it turns out the random number generator long used by developers working with Google's V8 JavaScript engine doesn't really generate random numbers at all.

You can see a video of the Cloudflare lava wall by [Tom Scott], below. If you don’t need a random number generator, maybe you could use a spectrum analyzer. Thanks to [Ptkwilliams] for the tip.

December 17, 2015 - 2:45 pm Over the years, multiple studies have found that Google Chrome’s V8 JavaScript engine was returning not-so-random numbers when you called the Math.random () function.

Bierhorst told Gizmodo that perhaps there’s a future in which something relying on this method could be scaled down. On the shorter scale, perhaps they can integrate it into the random number ...