Service Portal Widgets: Clear html fields in portal widget in client script

<br/><br/><button ng-click="clearFields()" class="btn btn-danger action-btn pull-left">Click to reset fields</button>

<textarea id='results_q' rows="10" cols="100">{{c.duplrecordsList}}</textarea>

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function($scope) {

  /* widget controller */

  var c = this;

$scope.clearFields = function() {

        //console.log("message", 'run the op');

      

        document.getElementById("tbl_name").value='';

                                    document.getElementById("dupl_field").value='';

                                    document.getElementById("custom_query").value='';

//--on a textarea:

c.duplrecordsList='';

                                   

  };

}