Please let me know if you use this little library, and any suggestions/comments for improvement are always welcome. Although this micro-lib addresses that issue somewhat. ![]() This could lead to interesting, surprising bugs during cljs-clj interop. UUID/randomUUID, while there is no generally available random uuid generator in the javascript world. This library supports both version 4 UUIDs (UUIDs from random numbers) and version 1 UUIDs (time-based UUIDs), and provides an object-oriented interface to print a generated or parsed UUID in a variety of forms. ClojureScript's reader yields a re/UUID instance for uuid-literals, but doesn't check for any conformance and essentially accepts any string. UUID.js is a JavaScript/ECMAScript library to generate RFC 4122 compliant Universally Unique IDentifiers (UUIDs). Although this micro-lib addresses that issue somewhat, I believe that we should have a random-uuid generator as part of the batteries-included cljs-distro.Īnother issue that I came across is the fact that the /fromString does do a conformance check of the presented uuid-string, and throws an exception if it does not pass. this is the case with MAC, DCE and MD5 UUIDs). ![]() Also be careful with generating longer UUIDs and substring-ing them, since some parts of the ID may contain fixed bytes (e.g. The JavaScript standard library UUID describes an API for generating character encoded Universally Unique Identifiers (UUID) based on IETF RFC 4122, available. But of course, you can generate 8-character long unique strings (see the other answers). Adding more digits will increase this number, but a global counter will generate 100 unique IDs. It is not possible since a UUID is a 16-byte number per definition. ![]() There are 151 other projects in the npm registry using short-unique-id. let uniqueId Math.random ().toString (36).substring (2) + Date.now ().toString (36) Based on the same method, if two IDs are generated at less frequent intervals, then they would be 99.99 likely to be globally unique (collision in 1 out of 1015). Generate UUID (Universally Unique IDentifier) or GUID (Globally Unique IDentifier). Start using short-unique-id in your project by running npm i short-unique-id. Latest version: 5.0.3, last published: 2 months ago. This post will introduce a super tiny and easy-to-use JS library to generate random UUID, which can be used in browsers and node.js. We can use this function to generate a random number and convert it into a unique string.I've wrapped my random uuid generator up in a little library at:ĬlojureScript micro-library with an implementation of a type 4, random UUID generator compatible with RFC-4122 and re/UUID (make-random-uuid), a uuid-string conformance validating predicate (valid-uuid?), and a UUID factory from uuid-string with conformance validation (make-uuid-from).Īs mentioned before, clojure on the jvm can leverage the ubiquitous "/randomUUID", while there is no generally available random uuid generator in the javascript world. Generate random or sequential UUID of any length. The Math.random() function returns a random floating-point number between 0 and 1.
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