AngularJS | ng-options Directive

The ng-options Directive in AngularJS is used to build and bind HTML element with options to a model property. It is used to specify <options> in a <select> list. It is designed specifically to populate the items of a dropdown list. It is supported by <supported> element.

Syntax:

<element ng-options="expression"> Content ... </element>

Example 1: This example uses ng-options Directive to display the option element.



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<!DOCTYPE html>
<html>
  
<head>
    <title>ng-options Directive</title>
      
    <script src=
"https://ajax.googleapis.com/ajax/libs/angularjs/1.6.9/angular.min.js">
    </script>
</head>
  
<body ng-app="app" style="text-align: center">
      
    <h1 style="color:green">GeeksforGeeks</h1>
    <h2>ng-options Directive</h2>                             
      
    <div ng-controller="geek" ng-init="StudentId=1">
        Sorting Algorithms: 
        <select ng-model="Sorting" ng-options="sort.name as 
            sort.name for sort in sorting"></select>
          
        <br><br><br><br><br>
          
        Selected sorting algorithm: 
        <input type="text" ng-model="Sorting" />
    </div>
      
    <script>
        var app = angular.module("app", []);
        app.controller('geek', ['$scope', function ($scope) {
            $scope.sorting = [
                { name: 'Merge sort', id: 1 }, 
                { name: 'Quick sort', id: 2 }, 
                { name: 'Bubble sort', id: 3 }
            ];
        }]);
    </script>
</body>
  
</html>                    

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Output:

Before selecting the element: 

ngoptions

After selecting the element:

ngoptions


Example 2: This example uses ng-options Directive to hide or display the element.











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<!DOCTYPE html> 


<html> 


  


<head> 


    <title>ng-options Directive</title> 


      


    <script src= 


    "https://ajax.googleapis.com/ajax/libs/angularjs/1.6.9/angular.min.js"> 


    </script> 


</head> 


  


<body ng-app="app" style="text-align: center"> 


      


    <h1 style="color:green">GeeksforGeeks</h1> 


    <h2>ng-options Directive</h2>                                


      


    <div ng-controller="geek" ng-init="Id=1"> 


        Choose: <select ng-model="hide" ng-options="show.hide 


            as show.name for show in HideShow"></select> 


      


        <br><br><br> 


          


        <span ng-hide="hide">  


            Check to hide <input type="checkbox"


                    ng-model="hide" /> 


        </span> 


    </div> 


      


    <script> 


        var app = angular.module("app", []); 


        app.controller('geek', ['$scope', function ($scope) { 


            $scope.HideShow = [ 


                { name: 'Hide', hide: true, },  


                { name: 'Show', hide: false } 


            ]; 


        }]); 


    </script> 


</body> 


  


</html> 



















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Output:

Before selecting hide element: 

ngoptions

After selecting hide element:

ngoptions



          
          
          
          

            

    

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