&gt; reproducible random sequence<p>That’s a hell of an oxymoron.<p><i>Edit</i> Yes, I know obviously the intent was to refer to a <i>pseudorandom</i> sequence, but that’s not what was said. It’s also not what Math.random promises. It promises random-seeming output, nothing more, nothing less. It did <i>not</i> promise a cross-platform, reliably reproducible stream of pseudorandom numbers, and it would be in error to abuse a black-box &quot;random&quot; API by considering it to be a fully specified pseudorandom stream.