Mutation Observer

mutationObserver.js

var dataContainer = document.getElementById('data-container');

    var observer = new MutationObserver(function (mutations) {
        var table = mutations[0].target.getElementsByTagName("TABLE")[0];
        if (table != undefined) {
            if (table.getElementsByTagName('tbody')[0].innerHTML.trim() == '') {
                document.getElementById('upload-nsld').style.display = "none";
            }
            else {
                document.getElementById('upload-nsld').style.display = "inline-block";
            }
        }
    });

    // configuration of the observer:
    var config = { attributes: false, childList: true, characterData: false };

    // pass in the target node, as well as the observer options
    observer.observe(dataContainer, config);