javascript - Why Download button not working with ajax php?

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I hava a problem. It is my sincere honor if anyone helps.

I have a webpage created with php (called mypage.php). I want to have 2 exactly identical download buttons in this webpage; one available after the page is loaded or refreshed completely and the other one loads in ajax mode after another button is clicked. Now, the first download button works great (which means it will download the file after clicking) but the ajax one is not working. In fact, I could connect the client side and server side, load my button.php file, get the response from server and see the second (ajax) download button in my webpage. but, unfotunately, it seems that for the ajax download button, just html and css are working. I mean if you click on the ajax download button, it does not download the file.

My codes are as below:

the html code of my first download button written as html in my main webpage (mypage.php):

<button class="gray doPrint" id="admin-sub-download-button" data-dp="download" data-func="download">Download </button>