Downloadable Link

gistfile1.txt

// Response Header
Header('Filename: filename.ext');

// html
<a href="path/to/file" download>Link</a>

// js

$('[download]').click(function(e) {
    e.preventDefault();

    var url = $(this).attr('href');
    var request = new XMLHttpRequest();
    var html = $(this).html();
    $(this).html('Downloading ...');
    $(this).attr('disabled', 'disabled');

    request.responseType = "blob";
    request.open("GET", url);

    var self = this;
    request.onreadystatechange = function () {
        if (request.readyState === 4) {
            var file = request.getResponseHeader('Filename');
            var anchor = document.createElement('a');
            anchor.download = file;
            anchor.href = window.URL.createObjectURL(request.response);
            anchor.click();
            $(self).html(html);
            $(self).removeAttr('disabled');
        }
    };
    request.send();
});