Save content of multiple div's as a PDF file by clicking HTML button

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I have a button 'Generate PDF', and I want it to save some div elements as a PDF file. From what I read, I best use JavaScript, but I have zero experience with JS. I already tried third party solutions like html2pdf, pdfmyurl, jsPDF, etc., but I didn't manage to get it to work like I want it.

This is the structure of the HTML file:

<!DOCTYPE html>
<html>
<head>
    <title>This is my title</title>
</head>

<body>

    <!-- HEADER --> 
        <div class="header">
            <img src="../logo/logo_17.png" width="320" height="100" />
        </div> 

    <!-- MENU -->  
        <div class="topnav" id="myTopnav">
            Menu...
        </div>  

    <!-- KOLOMMEN --> 
    <div class="row">
    
        <!-- LINKSE KOLOM -->        
            <div class="prodtitle" id="htmlContent1">Title</div>
            
            <div class="prodbuttons">
                <a class="h2button" href="#">BACK TO LIST</a>
                <button id="generatePDF" class="h2button">generate PDF</button>
            </div>
            
            <div class="prodinfotitle">Info/Description</div>
            
            <div class="prodinfo" id="htmlContent2">
                ...some text
            </div>  
            
            <div class="prodmaterialstitle">Materials/Ingredients</div>
            
            <div class="prodmaterials">
                ...some text 
            </div>
              
            <div class="gallery">            
                ...image 1 (if available)
            </div>
            
            <div class="gallery">
                ...image 2 (if available)
            </div>  
            
        <!-- RECHTSE KOLOM -->         
            <div class="side">
            ... 
            </div>      
    </div>    

    <!-- FOOTER --> 
        <div class="footer">
        ...footer
        </div>
</body>
</html>

Now this is what I'm looking for:
When you click the 'Generate PDF' button, a PDF file should be created with the following div's: 'header', followed by the 'prodtitle' and then followed by 'prodinfotitle', 'prodinfo', 'prodmaterialstitle', 'prodmaterials' and the picture(s), if they're available. The PDF should then be saved as '[prodtitle].pdf', so that every file has the right title.

Can somebody help me with this piece of code and how to set it up?

Thanks very very much!

Update: Something I tried with my zero experience was this:

<script src="https://code.jquery.com/jquery-3.6.0.min.js"></script>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/jspdf/1.3.4/jspdf.min.js"></script>
    
    <script type="text/javascript">
        var doc = new jsPDF();
        var specialElementHandlers = {
            '#editor': function (element, renderer) {
            return true;
            }
        };
 
 
    $('#generatePDF').click(function () {
        doc.fromHTML($('#htmlContent1').html(), 15, 15, {
            'width': 700,
            'elementHandlers': specialElementHandlers
            });
        doc.fromHTML($('#htmlContent2').html(), 15, 15, {
            'width': 700,
            'elementHandlers': specialElementHandlers
            });
        doc.save('sample_file.pdf');
        });
    </script>

It didn't work because I got an empty pdf. I don't even know if the code is correct.



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