JSFiddle - React, Tailwind, and code Playground

HTML

<div ng-app='myApp' ng-controller="MyCtrl">
    <a href="" ng-click="toggleClass()" ng-class="{active:toggle}">Toggle</a>
</div>

CSS

.active{
    background-color : green
}

JavaScript

var app = angular.module('myApp', []);
app.controller('MyCtrl', function ($scope) {

    $scope.toggle = true;
    $scope.toggleClass = function()
    {
        $scope.toggle = !$scope.toggle;
    }
    
});