You can use promisify for the first one. For the second one I think these libraries doing that but still not supporting promises are not that common anymore but

You can use promisify for the first one. For the second one I think these libraries doing that but still not supporting promises are not that common anymore but nothing you can't do with promises yourself. Javascript has a single thread, but I see what you mean and it has been fixed recently. To support older versions you can simply declare an anonymous async function and execute it immediately.