items.attributes Object

Specifies the HTML attributes of a ToolBar button.

HTML attributes which are JavaScript keywords (e.g. class) must be quoted.

Example - adding custom class to a button

<div id="toolbar"></div>

<script>
    $("#toolbar").kendoToolBar({
        items: [
        { type: "button", text: "My Button", attributes: { "class": "red" } }
        ]
    });
</script>

<style>
    .red { background-color: red; }
</style>