code: function formatMailBody(obj, order) {
    var result = "";
    if (!order) {
      order = Object.keys(obj);
    }
    
    // loop over all keys in the ordered form data
    for (var idx in order) {
      var key = order[idx];
      result += "<h4 style='text-transform: capitalize; margin-bottom: 0'>" + key + "</h4><div>" + sanitizeInput(obj[key]) + "</div>";
      // for every key, concatenate an `<h4 />`/`<div />` pairing of the key name and its value, 
      // and append it to the `result` string created at the start.
    }
    return result; // once the looping is done, `result` will be one long string to put in the email body
  }
docs: spit out all the keys/values from the form in HTML for email uses an array of keys if provided or the object to determine field order