Defiant Example

HTML

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

JavaScript

var data = [
       {
          "Key1": "Value1",
          "Key2": "Value2"
       },
       {
          "Key3": "Value3",
          "Key4": "Value4"
       }
    ],
    res = JSON.search( data, "//*[contains(., 'value3')]" );

document.getElementById('output').innerHTML = JSON.stringify( res[0], null, '   ' );