![]() As a workaround, though, prepend client-generated IDs with userid, so that adversary/faulty client can only collide with themselves (and handle that on server side). And since there were only going to be 2-10 options per question, I didn't need those IDs to be very long either. There's a big problem in your architecture, unrelated to UUIDs - client may intentionally generate colliding IDs. Since these IDs are generated on the front end, I didn't want to use a dedicated ID library to achieve it. But sometimes, you just need a short unique ID.Īnd maybe you don't want to use another JavaScript library for it.įor example, I was recently putting together a quick quiz, and I need each of the answer options to have unique IDs. It contains 16 bytes values that can be used to identify unique. Here's the function I use to create a random unique ID in JavaScript, and an explanation of how it works.Ĭreating unique random IDs can be a pretty complex task, and there are dedicated libraries like uuid that can handle this for you.īut sometimes, those IDs can end up being pretty long, with timestamps and other details involved. Javascript Universally Unique Identifier (UUID). The term GUID is generally used by developers working with Microsoft technologies, while UUID is used commonly used elsewhere. It is a 128-bit integer number used to identify resources. Examples The method is accessed through the global crypto property. Return value A string containing a randomly generated, 36 character long v4 UUID. ![]() Nano ID is quite comparable to UUID v4 (random-based). What is a GUID GUID (aka UUID) is an acronym for 'Globally Unique Identifier' (or 'Universally Unique Identifier'). The randomUUID () method of the Crypto interface is used to generate a v4 UUID using a cryptographically secure random number generator. If you need a simple short ID and don't have any complex requirements for it, then a simple JavaScript function could be all you need. React React Native PouchDB and CouchDB Web Workers CLI Other Programming Languages Tools Comparison with UUID.
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