Edit in JSFiddle

<script type="text/mustache" id="app-template">
    <h1>{{message}}</h1>
</script>

<!-- CanJS needs a place to put your application -->
<div id="my-app"></div>

// Give message a value
var data = {message: "Hello World!"};

// Pass the id of the template and the data, containing our message to can.view
var frag = can.view("app-template", data);

//Load the DocumentFragment in the page
$("#my-app").html( frag );