loadIframelyEmbedJsConditional.js

<script type="text/javascript">
    function loadIframelyEmbedJs() {
        // Replace 'iframe.ly' with your custom CDN if available.
        if (document.querySelectorAll("[data-iframely-url]").length === 0
            && document.querySelectorAll("iframe[src*='iframe.ly']").length === 0) return;
        var iframely = window.iframely = window.iframely || {};
        if (iframely.load) {
            iframely.load();
        } else {
            var ifs = document.createElement('script'); ifs.type = 'text/javascript'; ifs.async = true;
            ifs.src = ('https:' == document.location.protocol ? 'https:' : 'http:') + '//cdn.iframe.ly/embed.js';
            var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(ifs, s);
        }
    }
    // Run after DOM ready.
    loadIframelyEmbedJs();
</script>