Enforce required parameters for functions

requiredParameter.js

/**
Enforce required params for functions
@author Tauqeer Awan
*/

// Define a function and throw an error from it
const isRequiredParameter = parameterName => {
  throw new Error(`Missing parameter ${parameterName}`);
}

// Define a new function and use isRequiredParameter as default value
const mul = (a = isRequiredParameter('a'), b = isRequiredParameter('b')) => a * b;

// Now test your function
// This will not throw any error
mul(1, 2); // returns 2
mul(1) // throws error -> Missing parameter b