What could be the reason for jQuery not functioning properly as needed?

function toggleDisplayingRooms(nameSelect){
      if(nameSelect){
           firstroom            = document.getElementById("firstroom").value;
           secondroom           = document.getElementById("secondroom").value;
           thirdroom            = document.getElementById("thirdroom").value;
           fourthroom           = document.getElementById("fourthroom").value;
          if(firstroom == nameSelect.value){
              hideAllRoomsExcept("displayingFirstAdultChild");
          }
          else if(secondroom == nameSelect.value){
              hideAllRoomsExcept("displayingSecondAdultChild");

          }else if(thirdroom == nameSelect.value){
              hideAllRoomsExcept("displayingThirdAdultChild");
              
          }else if(fourthroom == nameSelect.value){
              displayAllRooms();
          }
      }
   }

   function toggleDisplayingChildAge(nameSelect, room){
    // body... 
    if(nameSelect && room){
             first_child_col            = document.getElementById(room + "_first_child_col").value;
             second_child_col           = document.getElementById(room + "_second_child_col").value;

            if(first_child_col == nameSelect.value){
                hideAllChildAges();
                document.getElementById("displaying_first_child_age_" + room).style.display = "block";
            }
            else if(second_child_col == nameSelect.value){
                document.getElementById("displaying_first_child_age_" + room).style.display = "block";
                document.getElementById("displaying_second_child_age_" + room).style.display = "block";
            }else {
                hideAllChildAges();
            }
        }
     }

     /* HTML code for room service options */
        <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css">
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>
<link rel="stylesheet" href="//code.jquery.com/ui/1.12.1/themes/base/jquery-ui.css">
<link rel="stylesheet" href="/resources/demos/style.css">
<script src="https://code.jquery.com/jquery-1.12.4.js"></script>
<script src="https://code.jquery.com/ui/1.12.1/jquery-ui.js"></script>
<div class="row">
   <div class="form-group">
      
      
      <div class="col-sm-1">
         <label>Rooms</label>
         <select id="rooms" onchange="toggleDisplayingRooms(this);" class="form-control">
            <option id="empty">Select</option>
            <option id="firstroom"  value="1">1</option>
            <option id="secondroom"     value="2">2</option>
            <option id="thirdroom"  value="3">3</option>
            <option id="fourthroom"     value="4">4</option>
            <option id="fifthroom"  value="5">5</option>
            <option id="sixthroom"  value="6">6</option>
         </select>
      </div>
      
   </div>
</div>
...

This is a snippet of code for a room service feature that displays rooms based on selected options. It works fine when selecting individual rooms, but experiences issues when trying to display all rooms at once or selecting child options. The functionality needs to be modified for better user experience.

Answer №1

If you obtained this code from someone else, making the switch to jQuery will require significant modifications. However, feel free to maintain the current code if that's your preference.

The concept behind using a Function is to streamline repetitive tasks. It's more efficient to create one function that can handle multiple sections rather than creating separate functions for each section, unless each section serves a distinct purpose.

By making some slight adjustments to the HTML, you can optimize the usage of class attributes and simplify your code significantly.

Consider the following example:

function displayingListAdultChild(nameSelect) {
  if (nameSelect) {
    $(".display-selection").hide();
    for (var i = 0; i < nameSelect.value; i++) {
      $(".display-selection").eq(i).show();
    }
  }
}

function displayingNumberOfChildAge(nameSelect) {
  if (nameSelect) {
    if (nameSelect.value == 1) {
      $(nameSelect).closest(".display-selection").find(".child-1").show();
      $(nameSelect).closest(".display-selection").find(".child-2").hide();
       //more code here
    } else {
       //additional code here
    }
  }
}

Rather than targeting individual items by their ID, consider utilizing class selections for more systematic and generalized approaches. This enables the use of one function across multiple sections or rooms.

If the explanations seem unclear, I recommend revisiting basic jQuery tutorials for a better understanding of how leveraging the jQuery framework can greatly benefit your workflow.

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