webcrypto.js

const publicJwk = {
  "kty": "RSA",
  "kid": "",
  "n": "",
  "e": "AQAB"
};

const privateJwk = {
  "kty": "RSA",
  "kid": "",
  "n": "",
  "e": "AQAB",
  "d": "",
  "p": "",
  "q": "",
  "dp": "",
  "dq": "",
  "qi": ""
};

const test = async () => {
  const privateKey = await globalThis.crypto.subtle.importKey(
    "jwk",
    privateJwk,
    { name: "RSA-PSS", hash: { name: "SHA-256" } },
    false,
    ["sign"],
  );

  const publicKey = await globalThis.crypto.subtle.importKey(
    "jwk",
    publicJwk,
    { name: "RSA-PSS", hash: { name: "SHA-256" } },
    false,
    ["verify"],
  );

  const encoded = new TextEncoder().encode("Hello World");

  const signature = await globalThis.crypto.subtle.sign(
    {
        name: "RSA-PSS",
        saltLength: 128, //the length of the salt
    },
    privateKey, //from generateKey or importKey above
    encoded //ArrayBuffer of data you want to sign
  )

  const result = await globalThis.crypto.subtle.verify(
    {
      name: "RSA-PSS",
      saltLength: 128, //the length of the salt
    },
    publicKey,
    signature,
    encoded
  );

  console.log(result);
};

test();