Swith in js

eye_color.js

function updateShadowColorValues(value){
  var eye_color = "none";
  switch (true) // << compare true with case value
  {
    case (value == 0):
      eye_color = "cero [" + value + "]";
      break;
    case (value > 0 && value < 21):
      eye_color = "white [" + value + "]";
      break;
    default:
      eye_color = "fail [" + value + "]";
  }
  return eye_color;
}