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Generate UUID (Node.js)
JavaScript, Node, Random · Mar 14, 2022
Generates a UUID in Node.JS.
- Use
crypto.randomBytes()to generate a UUID, compliant with RFC4122 version 4. - Use
Number.prototype.toString()to convert it to a proper UUID (hexadecimal string). crypto.randomUUID()provides similar functionality.
const crypto = require('crypto');
const UUIDGeneratorNode = () =>
([1e7] + -1e3 + -4e3 + -8e3 + -1e11).replace(/[018]/g, c =>
(c ^ (crypto.randomBytes(1)[0] & (15 >> (c / 4)))).toString(16)
);UUIDGeneratorNode(); // '79c7c136-60ee-40a2-beb2-856f1feabefc'More like this
Calculate SHA-256 hash (Node.js)
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Creates a hash for a value using the SHA-256 algorithm. Returns a promise.
Stream is duplex
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Checks if the given argument is a duplex (readable and writable) stream.
Stream is writable
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Checks if the given argument is a writable stream.