Reports

The example from Bohdan Yurchuk is incorrect, unfortunately I do not have enough reputation to point it out in a comment. .substring() takes startIndex and endIndex parameters not startIndex and count.

Correct code

function generateUuidBySeed(seedString) {
    const hash = crypto.createHash('sha256').update(seedString).digest('hex');

    // UUID version 4 consists of 32 hexadecimal digits in the form:
    // 8-4-4-4-12 (total 36 characters including hyphens)
    console.log(hash)
    const uuid = [
        hash.substring(0, 8),
        hash.substring(8, 12),
        '4' + hash.substring(12, 15), // Set the version to 4
        '8' + hash.substring(15, 18), // Set the variant to 8 (RFC 4122)
        hash.substring(18, 30),
    ].join('-');

    return uuid;
}

// Example usage:
const seedString = 'your-seed-string';
const uuid = generateUuidBySeed(seedString);
console.log(uuid);

crypto is a native Node.js module and does not require additional libraries.

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