Based on previous posts and playing a little more with some useful JavaScript functions, I came across a very inefficient way of determining whether a given user was member of a role based on its provisioned list of roles

A simple way of achieving it is by using the map() and join() JavaScript functions:

The map() method creates a new array with the results of calling a provided function on every element in the calling array.

The join() method creates and returns a new string by concatenating all of the elements in an array.