pygal/demo/moulinrouge/static/js.js

$(function () {
    $('figure figcaption').append(
        $('<button>')
            .text('⟳')
            .click(function() {
                var $fig, $embed, w, h, src;
                $fig = $(this).closest('figure');
                $embed = $fig.find('embed');
                w = $embed.width();
                h = $embed.height();
                src = $embed.attr('src');
                $embed.remove();
                $fig.prepend(
                    $('<embed>')
                        .attr({
                            src: src,
                            type: 'image/svg+xml',
                            width: w,
                            height: h
                        })
                );
            })
    );
});