How to implement functions from PHP openssl_pkey_get_private, openssl_sign on NodeJS?

Question

I write code according to the documentation, where the examples are shown in PHP

$data = json_encode([...]);
$key = openssl_pkey_get_private(
        file_get_contents('./private.pem'),
        file_get_contents('./password.txt')
);
openssl_sign($data, $sign, $key );
$signature = base64_encode($sign);

I am trying to do something in js.

const crypto = require('crypto');

const data = [];
const cert = '...'; // it's .pem file
const password = '...';
const signature = crypto.createSign('sha256');
const key = signature.sign({ key: cert, passphrase: password });

I'm not sure if this is correct, but I can't figure out how I can now execute the openssl_sign function.