vaadin js injection

vaadin.executeJavaScript

//    // top tool bar background color css variable customization point
//    UI.getCurrent().getPage().executeJavaScript("window.onload = function() {\n" +
//            "  setTimeout(function() {\n" +
//            "    var html = document.getElementsByTagName('html')[0];\n" +
//            "    html.style.cssText = \"--app-layout-bar-background-color: #004a96\";\n" +
//            "  }, 0);\n" +
//            "};");