var step_number = 0;

switch (Shopify.Checkout.step) {
case "contact_information":
  step_number = 1;
  break; 
case "shipping_method":
  step_number = 2;
  break; 
case "payment_method":
  step_number = 3;
  break;
case "review":
  step_number = 4;
}

if(step_number > 0) {
  ga("require", "ec");
  ga("ec:setAction", "checkout", {
    "step": step_number,
  });
  ga('send', 'event', 'Checkout', 'Option');
}
//End of Checkout Steps for ee labelling