How to select an element by its class name in AngularJS?

Last Updated : 23 Jul, 2025

Given an HTML document and the task is to select an element by its className using AngularJS. The elements can be selected with the help of a class name using the document.querySelector() method that is used to return the first element that matches a specified CSS selector(s) in the document.

Approach: The approach is to use the element of className class1 that will be selected and its background color is changed to green, by using the document.querySelector() method.

Example 1: This example illustrates for selecting the element by its class name in AngularJS.

HTML

<!DOCTYPE HTML>
<html>

<head>
    <script src=
"//ajax.googleapis.com/ajax/libs/angularjs/1.2.13/angular.min.js">
    </script>
    <script>
        var myApp = angular.module("app", []);
        myApp.controller("controller", function($scope) {
            $scope.getClass = function() {
                var el = 
                angular.element(document.querySelector(".class1"));
                el.css('background', 'green');
            };
        });
    </script>
</head>

<body style="text-align:center;">
    <h1 style="color:green;">
        GeeksforGeeks
    </h1>
    <h3>
        How to select an element by
        its class in AngularJS
    </h3>
    <div ng-app="app">
        <div ng-controller="controller">
            <p class="class1"> This is GeeksforGeeks </p>
            <input type="button" 
                   value="click here"
                   ng-click="getClass()"> 
        </div>
    </div>
</body>
</html>

Output:

Example 2: In this example, the 2 elements of same class are selected and some of the CSS is changed.

HTML

<!DOCTYPE HTML>
<html>

<head>
    <script src=
"//ajax.googleapis.com/ajax/libs/angularjs/1.2.13/angular.min.js">
    </script>
    <script>
        var myApp = angular.module("app", []);
        myApp.controller("controller", function($scope) {
            $scope.getClass = function() {
                var el = 
                angular.element(document.querySelectorAll(".class1"));
                el.css({
                    'background': 'green',
                    'color': 'white'
                });
            };
        });
    </script>
</head>

<body style="text-align:center;">
    <h1 style="color:green;">
        GeeksforGeeks
    </h1>
    <h3>
        How to select an element by
        its class in AngularJS
    </h3>
    <div ng-app="app">
        <div ng-controller="controller">
            <p class="class1"> This is GeeksforGeeks </p>
            <p class="class1"> A computer science portal </p>
            <input type="button"
                   value="click here" 
                   ng-click="getClass()"> 
        </div>
    </div>
</body>
</html>