Edit in JSFiddle

var myapp = angular.module('sampleapp', [ ]);

myapp.controller('samplecontoller', function ($scope) {

  $scope.showloader = function(){
        $scope.state = "LOADING" ;
    }
    $scope.noresult = function(){
        $scope.state = "NORESULT" ;
    }
    $scope.result = function(){
        $scope.state = "SUCCESS" ;
    }


});


 

<div ng-app="sampleapp">
<div ng-controller="samplecontoller">
    
    <div class="form">
        <p>Click to see the different states</p>
    <button class="btn btn-primary" ng-click="showloader()">Show loader</button>    
    <button class="btn btn-primary" ng-click="noresult()">No Result</button>    
       <button class="btn btn-primary" ng-click="result()">Result</button>    
    
        
    
    </div>
    <div class="cancel">
        <button ng-show="state == 'LOADING'" class="btn btn-success">Loading...
        <i class="fa fa-spinner fa-spin"></i>
        </button>
        <p ng-show="state == 'NORESULT'">No results found .Please try after some time</p>
        <p ng-show="state == 'SUCCESS'"><strong>Your result</strong><br/>
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          </p>
        
    </div>
    
</div>
</div>

.form{
    padding:20px
}
.cancel{
    
    padding:20px;
}