pbkdf2.js

async function pbkdf2(login, password, iterations = 1e6, keylen = 256, digest = "SHA-512") {
    // wtfpl (c) 2021 Nircek
    // src: https://gist.github.com/Nircek/bf06c93f8df36bf645534c10eb6305ca
    const salt = new TextEncoder().encode(login);
    const plaintext = new TextEncoder().encode(password);
    const key = await crypto.subtle.importKey("raw", plaintext, "PBKDF2", false, ["deriveBits"]);
    const params = { name: "PBKDF2", hash: digest, salt, iterations };
    const hash = await crypto.subtle.deriveBits(params, key, keylen);
    return btoa(String.fromCharCode(...new Uint8Array(hash)));
}

console.assert(await pbkdf2("salt", "secret", 512, 64, "SHA-512") == "1YqXX+X2PNg=", "pbkdf2");
console.assert(await pbkdf2("admin", "secret") == "u/+1fh/AmmWzro+YA7khgk1L5VfYoABocupuT41i+AA=", "pbkdf2");

Inspired by https://gist.github.com/chrisveness/770ee96945ec12ac84f134bf538d89fb