acha-framework/src/frontend/core/scripts/directives/validation-messages/template.html

is a modular framework on both client (angular.js) and server (node.js) side, it provides security, orm, ioc, obfuscation and ...

<div class="af-validation-messages af-component">
    <ul ng-if="model.length">
        <li ng-repeat="error in model">
            <i class="{{::(error.icon?error.icon:'fa fa-info')}}"></i>
            <span>{{::error.message}}</span>
        </li>
    </ul>
</div>