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How to filter ng-repeat values according to ng-model using AngularJS ?

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  • Last Updated : 01 Aug, 2022
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In this article, we will see how to filter the value of the ng-repeat directive according to the ng-model directive using AngularJS.

The ng-repeat values can be filtered according to the ng-model in AngularJS by using the value of the input field as an expression in a filter. We can set the ng-model directive on an input field to filter ng-repeat values. The below illustrations describes the approach for the implementation.

Example 1: Filtering input text ng-repeat values according to ng-model. This filter will show the names of only the matching city.

HTML




<!DOCTYPE html>
<html>
  
<head>
    <script src=
    </script>
</head>
  
<body>
    <center>
        <h1 style="color:green;">
            GeeksforGeeks
        </h1>
        <h3>
            Filter ng-repeat values according to ng-model
        </h3
    </center>
    <div ng-app="app1" ng-controller="controller1">
        <p>Type a city name in the input field:</p>
        <p>
            <input type="text" ng-model="testfilter">
        </p>
        <p>Filter show the names of only the matching city.</p>
  
        <ul>
            <li ng-repeat="x in citynames | filter:testfilter">
                 {{ x }} 
            </li>
        </ul>
    </div>
    <script>
        angular.module('app1', []).controller(
        'controller1', function($scope) {
            $scope.citynames = [
                'Ahmedabad', 
                'Ajmer', 
                'Bhopal', 
                'Jaipur', 
                'Surat', 
                'Nagpur', 
                'Mumbai', 
                'Pune', 
                'Indore', 
                'Udaipur', 
                'Jodhpur', 
                'Jabalpur', 
                'Gwalior', 
                'Delhi', 
                'Lucknow', 
                'Banglore'
                ];
            });
    </script>
</body>
</html>

Output: Example 2: Filtering input text ng-repeat values according to ng-model. This filter will show the names of only the matching programming language after capitalizing on each language by applying the filter. 

HTML




<!DOCTYPE html>
<html>
  
<head>
    <script src=
    </script>
</head>
  
<body>
    <center>
        <h1 style="color:green;">
            GeeksforGeeks
        </h1>
        <h3>
            Filtering input text ng-repeat 
            values according to ng-model
        </h3>
    </center>
    <div ng-app="app1" ng-controller="controller1">
        <p>
            Type a programming language 
            name in the input field:
        </p>
  
        <p>
            <input type="text" ng-model="testfilter">
        </p>
  
        <p>
            Filter shows the names of only the 
            matching programming language after 
            capitalizing each language by 
            applying filter.
        </p>
  
        <ul>
            <li ng-repeat=
"x in programminglanguagenames| filter:testfilter">
                {{ x |myfilter}}
            </li>
        </ul>
    </div>
  
    <script>
        var app = angular.module('app1', []);
        app.filter('myfilter', function () {
            return function (x) {
                var i, c, txt = "";
                for (i = 0; i < x.length; i++) {
                    c = x[i];
                    c = c.toUpperCase();
                    txt += c;
                }
                return txt;
            };
        });
          
        app.controller('controller1', function ($scope) {
            $scope.programminglanguagenames = [
                'cobol',
                'pascal',
                'ruby',
                'php',
                'perl',
                'python',
                'c',
                'c++',
                'java',
                'html',
                'css',
                'javascript',
                'basic',
                'lisp',
                'smalltalk',
                'bootstrap'
            ];
        });
    </script>
</body>
  
</html>

Output:


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