How to Generate Unique IDs in Node
A universally unique identifier (UUID) is a 128-bit character string you can use to label and access data. Using Node.js, you can easily create UUIDs using several approaches.
UUIDs are powerful for unique identification because the chances of encountering the same ID are very small. This also means you can generate a UUID autonomously without cross-checking against a central database. UUIDs are highly scalable.
Using the crypto Module
The built-incrypto modulein Node provides the randomUUID() method to generate UUIDs.
To preventrandomUUID()from using the cache during UUID generation, setdisableEntropyCacheto true, like this:
Using the uuid Package
Unlike the crypto module, theuuid packageis a third-partynpm module. To install it, run the following command.
uuid allows you to generate different ID versions:
This example shows how it’s possible to generate a version 4 UUID:
Using Nano ID
Nano IDis also another NPM package used to generate UUIDs in Node. While it works nearly the same as the uuid package, there are some differences:
Use the following code to generate a Nano ID:
Is Nano ID Better Than uuid?
There are at least three methods you can use to generate a UUID in Node: the built-in crypto module and the uuid and Nano ID third-party packages. If you want to use an external package, consider Nano ID. It is smaller and much faster than uuid.
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