$(document).ready(function() {
    console.log("hi");
    function check_for_button() {
        if ($('div.react-grid-Toolbar .tools button.btn').length) {
            $('div.react-grid-Toolbar .tools button.btn').style.display = 'none';
        } else {
            setTimeout(check_for_button, 1000);
        }
    }
    document.title = "This is the new page title.";
})