The jQuery code functions as intended on CodePen and JSFiddle, however, it does not operate

My collapsible jquery div code functions properly on codepen and JSFiddle. However, when I transfer everything to my own webpage (with modified content), the div does not expand as expected. What could be causing this issue, or where did I make a mistake?

The script tags in the head section are:

<head>
    <script src="//code.jquery.com/jquery-1.10.2.js"></script>
    <script src="//code.jquery.com/ui/1.11.0/jquery-ui.js"></script> 

    <script type="text/javascript">
        $(".header").click(function () {
            $header = $(this);
            $content = $header.next();
            $content.slideToggle(500, function () {
                $header.text(function () {
                    return $content.is(":visible") ? "Collapse" : "Expand";
                });
            });
        });
    </script>
</head>

The content within the body is as follows:

<form method="post" action="sales_report.php" enctype="multipart/form-data">
    //multiple <input /> fields here
    <div class="container">
        <div class="header"><span>+Options</span></div>
        <div class="content">
            <h3>Designate the Column of:</h3>
            <p>Account Name</p>
            <input required type="number" name="sales_report_col_acc" id="sales_report_col_acc" value='1' />
            <p>Sale Amount</p>
            <input required type="number" name="sales_report_col_amt" id="sales_report_col_amt" value='2' />
            <p>Sale Date (optional)</p>
            <input type="number" name="sales_report_col_date" id="sales_report_col_date" value='3' />
            </br /> 
        </div>
    </div>
    <input type="submit" name="sales_report_submit" value="Go" />
</form>

Any guidance on resolving this issue would be greatly appreciated. Could there be any essential components related to jquery that I might have overlooked?

Answer №1

Ensuring your code executes after the document has loaded is crucial:

$(document).ready(function(){
     //place your code here
});

Alternatively, you can use a shortcut:

$(function(){
   //insert your code here
});

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