JSFiddle - React, Tailwind, and code Playground

HTML

<a href="http://placehold.it/100x100" class="download-certificate-link" data-title="certificate.png" download="certificate.png">Download</a>

CSS

a { display:block; }
a > img { border: 1px solid blue; }

JavaScript

$(document).ready(function(){
    $('.download-certificate-link').each(function(){
        var $this = $(this);        
        $this.wrap('<a href="' + $this.attr('src') + '" download />')
    });
});