I am using DynamicPDF and I am opening my file in new tab to generate my file which is working absolutely fine. Here is what I have sone so far (in one of my plugin's update.htm file).

<a href="<?= url('/'); ?>/regency-brochure" class="btn btn-primary" target="_blank">Preview Brochure</a>

Now I am trying to somehow do the same by opening/downloading the same file via AJAX response. Hence I have put below code inside my update.htm file.

<button
                        type="submit"

                        data-request="onPreview"
                        data-load-indicator="Loading Preview"
                        class="btn btn-primary">Preview Brochure Ajax
                    </button>

And Inside my controller I have done this.

public function onPreview()
    {        
     return PDF::loadTemplate('renatio::invoice')->download('download.pdf');
    }

Now as soon as I click on it, my browser getting hanged, but I am able to see some random binary long string in my response.

I have checked and read library's documentation and they are giving a tip saying...

Tip: Download PDF via Ajax response

OctoberCMS ajax framework cannot handle this type of response.

Recommended approach is to save PDF file locally and return redirect to PDF file.

And I tried to open / download by using return but its not working.

Can someone guide me how can I solve this ? How can I make my PDF file open / download using AJAX here ?

I have implemented this feature. If anyone wants to follow, visit this thread - https://stackoverflow.com/questions/55756920/octobercms-dynamicpdf-open-or-download-via-ajax

Hope this helps.