JSFiddle - React, Tailwind, and code Playground

HTML

<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.2.10/angular.min.js"></script>
<script>
    function FriendsCtrl($scope) {
    $scope.friends = [{
        email: ['abc', 'def']
    }, {
        email: ['ghi', 'jkl']
    }];
}
</script>
<div ng-app ng-controller="FriendsCtrl">
    <ul>
        <li ng-repeat="friend in friends">
            {{friend.email.join(', ')}}
        </li>
    </ul>
</div>