Defiant Example

HTML

<script src="http://defiantjs.com/defiant.js/dist/defiant-latest.min.js"></script>
<div id="output"></div>

JavaScript

var data = {
        "coupons":{
            "item1":{
                "id":"155",
                "name":"First Item",
                "value":-5199.6
            },
            "item2":{
                "id":"255",
                "name":"Second Item",
                "value":-424.91
            }
        }
    },
    res = JSON.search( data, '//*[coupons]' ),
    str = '';

for (var i=0; i<res.length; i++) {
    str += res[i].id +' : '+ res[i].name +'<br/>';
}

document.getElementById('output').innerHTML = str;