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How to generate a strong random hexadecimal string in Node.js

…and using TypeScript syntax. Simply use the “crypto” standard library.

import * as crypto from 'crypto';
const randomString = crypto.randomBytes(32).toString('hex');

Note that it will produce cryptographically strong pseudo-random data, but the drawback of this is that it will freeze a bit in case of a lack of entropy. As mentioned in the documentation, such lack of entropy shouldn’t ever create a noticeable delay, except right after system boot.

Posted in JavaScript / TypeScript / Node.js.


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