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stubish • yesterday at 8:46 AM • 1 reply • view on HN

The UUIDv4 collision is statistically extremely unlikely. What is more likely is both systems used the same seed. This might be just a handful of bytes, increasing the chance of collision to one in billions or even millions.

Replies

tracker1 • yesterday at 6:08 PM

The shim for node:crypto in the browser is likely a weaker implementation in JS than the node implementation... you can cheat and use the browser itself to get a UUIDv4...

    function uuid4() {
      var temp_url = URL.createObjectURL(new Blob());
      var uuid = temp_url.toString();
      URL.revokeObjectURL(temp_url);
      return uuid.split(/[:\/]/g).pop().toLowerCase(); // remove prefixes
   }