![]() Note: You can also use your own pseudo-random number generators to generate ULIDs. import from 'ulid' const random_number_gen = detectPrng(true) const ulid = factory(random_number_gen) ![]() However, if you want to use Math.random() in ULID, you need to allow permission for that explicitly. But, ULID blocks the use of Math.random() by default and automatically decides a suitable random number generator based on the situation.įor example, it will use crypto.getRandomValues for browsers and crypto.randomBytes for Node environments. Most random ID generators use unsafe Math.random() to generate IDs. Note: The timestamp part of the ULID is represented with UNIX-time in milliseconds, and it won’t run out of space ’til the year 10889 AD. Instead, you can use the timestamp representation of ULID to order or partition data based on the created time. This feature of ULID allows developers to easily manage database-related tasks like sorting, partitioning, and indexing.įor example, you don’t need to create an extra column to maintain the record created time. Lexicographical sortability is one of the most highlighted features of ULID.Īs we are already aware, ULIDs can be sorted. It is supposedly 2 times faster than UUID and smaller. It brands itself as A tiny, secure, URL-friendly, unique string ID generator for JavaScript. Nano ID to generate UUID using Node.js Nono ID is another popular NPM package used to generate UUID in Node.js. It excludes I, L, O, and U letters to avoid any unexpected confusion. Consequently, we will use the Nono ID NPM package to generate UUID with Node.js. Note: ULIDs are encoded using Crockford’s Base32 alphabet ( 0123456789ABCDEFGHJKMNPQRSTVWXYZ). Both these parts are base 32 encoded strings and represented using 48 bits and 80 bits, respectively.įor example, break down of the above ULID would look like this: 01FHZXHK8PTP9FVK99Z66GXQTX Timestamp (48 bits) - 01FHZXHK8P Randomness (80 bits) - TP9FVK99Z66GXQTX The first 10 characters of the ULID represent the timestamp and the second part of the ULID represents randomness. Example UUID 01FHZXHK8PTP9FVK99Z66GXQTX When you generate an ID using UUID, it will generate a 36 character long string by only considering randomness or timestamp.īut, ULID considers both randomness and timestamp to generate IDs and they are encoded as 26 character strings (128 bits).
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