Node.js promisify every callback based function

With the following JavaScript pattern we can provide Promise based API to every legacy callback based function in Node.js.

import { promisify } from 'util';

const action = function (param1, callback) {
  if (!callback) return promisify(checkPortStatus, arguments);
  ...
};

Now we can call our function with

// Before:
action(123, () => { });
// After:
await action(123);

I have to mention that we have to be careful when using optional parameters. In that case you have to check the callback function before re-invoking the function itself again.
I would argue that using the options object pattern is a good way to avoid this problem anyway.

const action = function (param1, optionalParam2, callback) {
  if (typeof callback === 'undefined') callback = optionalParam2;
  if (!callback) return promisify(checkPortStatus, arguments);
  ...
};

Aso remember, we can only use the arguments object within a function statement / declaration / expression and NOT in a arrow function expression / lambda expression.

Difference between Function Statement, Function Declaration, Function Expression, Arrow Function Expression, Lambda Expression