Ajax function implemented successfully with stylish design

Hi there! :)

I'm encountering an issue with my code. I am trying to create a dropdown filter using ajax, php, and json. The first dropdown menu (for selecting the build year of a car) is populated through php. The second dropdown menu allows users to choose the brand of the car, and is loaded via ajax and php. While everything is functioning correctly, the styling applied by ajax is not rendering on the element. Any suggestions on how I can resolve this?

AJAX Code

function displayBrand(sel) {
var selectedYear = sel.options[sel.selectedIndex].value;  
$("#output1").html( "" );
$("#output2").html( "" );
if (selectedYear.length > 0 ) { 

 $.ajax({
        type: "POST",
        url: "fetch_state.php",
        data: "selectedYear="+selectedYear,
        cache: false,
        beforeSend: function () { 
            $('#output1').html('<img src="loader.gif" alt="" width="24" height="24">');
        },
        success: function(html) {    
            $("#output1").html( html );
            $("#output1").addClass( "section colm colm6");
        }
    });
} 

}

PHP Code

require("configure.php");
$car_brand = ($_REQUEST["selectedYear"] <> "") ? trim( addslashes($_REQUEST["selectedYear"])) : "";
if ($car_brand <> "" ) { 
$sql = "SELECT DISTINCT make FROM VehicleModelYear WHERE year = ".$car_brand ." ORDER BY make desc";
$count = mysql_num_rows( mysql_query($sql) );
if ($count > 0 ) {
$query = mysql_query($sql);

?>

<div class="section colm colm6">
<label for="carBrand" class="field-label">(*) Brand</label>
<select name="brand" onchange="showCity(this);">
    <option value="">Select brand</option>
    <?php while ($rs = mysql_fetch_array($query)) { ?>
    <option value="<?php echo $rs["make"]; ?>"><?php echo $rs["make"]; ?></option>
    <?php } ?> 
</select>
<i class="arrow double"></i>
</label>
</div>
<?php 
    }
}
?>

HTML Code // Placeholder for the second dropdown, loaded via ajax..

<div id="output1">
                        </div><!-- end section -->

Answer №1

Provided that <element id="output1"/> is present, your jQuery code appears to be correct.

Make sure to check the network tab in your browser's developer tools (f12) to confirm if it has located loader.gif

Update

Just to clarify, when I mentioned checking if <element> exists, I wasn't referring specifically to the word 'element,' but rather to any general element like a div, since there was no mention of output1 in your original post.

This issue seems to be related to jQuery ui or smartform.

Consider changing from:

<element id="output1" class="section colm colm6">
  <div class="section colm colm6">
    <label class="field-label" for="carBrand">(*) Brand</label>
       <select onchange="showCity(this);" name="brand">
         <option value="">Select brand</option>
     <option value="Volvo">Volvo</option>
          ....

         </select>
     <i class="arrow double"></i>
  </div>
</element>

To:

  <div id="output1" class="section colm colm6">
    <label class="field-label" for="carBrand">(*) Brand</label>
       <select onchange="showCity(this);" name="brand">
         <option value="">Select brand</option>
     <option value="Volvo">Volvo</option>
          ....

         </select>
     <i class="arrow double"></i>
  </div>

If you're using jQuery ui or smartform to style the form, make sure to find a method to apply styles after the page has loaded. You'll need to call that method in your ajax success function.

Answer №2

It appears that I have identified the issue:

The <#output/> element is structured as follows:

<div id="output1" class="section colm colm6">
    <div class="section colm colm6">
        <label for="carBrand" class="field-label">(*) Merk</label>
        <select name="brand" onchange="showCity(this);">
            <option value="">Selecteer merk</option>
            <option value="Volvo">Volvo</option>
            ...
        </select>
        <i class="arrow double"></i>
    </div>
</div>

It should be formatted like this:

<div id="output1">
    <div class="section colm colm6">
        <label for="carBrand" class="field-label">(*) Merk</label>
---->   <label class="field select state-succes">    <---------------you miss this label
            <select name="brand" onchange="showCity(this);">
                <option value="">Selecteer merk</option>
                <option value="Volvo">Volvo</option>
                ...
            </select>
            <i class="arrow double"></i>
        </label>
    </div>
</div>
  • The problem lies in the missing
    <label class="field select state-succes">
    surrounding your dropdown menu, which was present in the initial setup.

In addition, the line

$("#output1").addClass( "section colm colm6");
adds a class to #output, but it already contains an extra div with the same class. This disrupts the alignment of the form's dropdown menu.
To resolve this issue, either eliminate the redundant div or refrain from adding the class to #output.

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