Added some more comments to the example to illustrate that there are more elements to use than just vaadin-grid.
</head>
<body>
+ <!-- Use the elements, for instance vaadin-grid -->
<vaadin-grid selection-mode="multi">
<table>
<!-- Define the columns -->
// use to determine when the custom elements are ready to be used
document.addEventListener("WebComponentsReady", function () {
+ // Configure vaadin-grid to show data
+
// Reference to the grid element
var grid = document.querySelector("vaadin-grid");