We’ll use the Math.random() function provided by JavaScript. Math.random() generates a random pseudo-number between 0 and 1.

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. Today that’s been fixed ...

And they don't say the random number generator function in JavaScript -- Math.random () -- is broken. They say it "offers sub-par quality." Specifically, V8 used a pseudorandom number generator (PRNG) ...