When to Ternary

You will probably use if/else statements more often than ternaries. Ternary operations are great for small, single-line conditionals. I've seen developers in the professional world get... clever... with ternaries and it can lead to nested monstrosities like this:

const vehicleName = isTruck
  ? "truck"
  : isCar
    ? "car"
    : isScooter
      ? "scooter"
      : "vehicle";

I mean it works, and it's all on one line, but it's much harder to understand IMO. I'd prefer to see this:

let vehicleName = "vehicle";
if (isTruck) {
  vehicleName = "truck";
} else if (isCar) {
  vehicleName = "car";
} else if (isScooter) {
  vehicleName = "scooter";
}

or maybe a function (we'll cover functions soon):

function getVehicleName(isTruck, isCar, isScooter) {
  if (isTruck) {
    return "truck";
  }
  if (isCar) {
    return "car";
  }
  if (isScooter) {
    return "scooter";
  }
  return "vehicle";
}

Remember: Code is written for humans not machines.