Edit in JSFiddle

<p><label><d-radio-button checked="true" name="category" value="SUV"></d-radio-button>SUV</label></p>
<p><label><d-radio-button name="category" value="Sport"></d-radio-button>Sport</label></p>
<p><label><d-radio-button name="category" value="Executive"></d-radio-button>Executive</label></p>

require.config({
    baseUrl: "http://ibm-js.github.io/libraries/master"     
});

require(["deliteful-build/layer"], function () {
    require([
        "deliteful/RadioButton"
    ], function (){
        document.body.style.display = "";
    });
});