title: UUIDGeneratorBrowser tags: browser,random,intermediate

Generates a UUID in a browser.

Use crypto API to generate a UUID, compliant with RFC4122 version 4.

const UUIDGeneratorBrowser = () =>
  (String(1e7) + -1e3 + -4e3 + -8e3 + -1e11).replace(/[018]/g, (c: string) =>
    (
      Number(c) ^
      (crypto.getRandomValues(new Uint8Array(1))[0] & (15 >> (Number(c) / 4)))
    ).toString(16)
  );

UUIDGeneratorBrowser(); // '7982fcfe-5721-4632-bede-6000885be57d'