javascript - Having problems with Ajax function and tcpdf output() -

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i using tcpdf create pdf form fields. problem have php script runs fine , creates file ajax fails though script has executed fine.

my ajax

$(document).ready(function() {      $("#make-pdf").click(function() {         // set variables form data          $.ajax({             url: "generate-pdf.php",             type: "post",             datatype: "json",             data: { pdf_name: $('#pdf-name').val(), salutation: $('#salutation').val(), client_name: $('#client-name').val(), client_location: $('#client-location').val(), client_email: $('#client-email').val(), reason_for_saving: $('#reason-for-saving').val(), advisor_name: $('#advisor-name').val(), advisor_email: $('#advisor-email').val(), advisor_contact: $('#advisor-contact').val(), brokerage_name: $("brokerage-name").val() },             success: function(){                  alert('success');             },             error:function(){                   alert('error');             }          });     }); });

the end of php file

$pdf->writehtml($html, true, false, true, false, '');      $pdf->output(__dir__ .'/pdfs/'.$pdf_name.'.pdf', 'f');      return true;      //============================================================+     // end of file     //============================================================+  } else {     return "incorrect request"; }  ?>

the function saves file supposed to, i'm getting failed response ajax call. nothing being logged in console either , page seems reload

the problem html button placed. didn't realise <button> inside <form> tags submit form though not type submit


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