Is there a way to join the elements in an js array, but let the last separator be different?

Question

What I want is something like Array.join(separator), but which takes a second argument Array.join(separator, beforeLastElement), so when I say [f

Answer 1

function getValuesfromArray(strArray) {
  let endString = "";

  if (strArray.length > 1) {
    const lastEntry = strArray.pop();
    endString = strArray.join(", ") + " or " + lastEntry;
  }
  else {
    endString = strArray.toString();
  }

  return endString;
}