ORIENT/modules/backend/controllers/index/index.htm

<?= Form::open(['class'=>'layout-relative dashboard-container']) ?>
    <div id="dashReportContainer" class="report-container loading">

        <!-- Loading -->
        <div class="loading-indicator-container">
            <div class="loading-indicator indicator-center">
                <span></span>
                <div>Loading...</div>
            </div>
        </div>

    </div>
<?= Form::close() ?>

<script>
    $(document).ready(function() {
        $.request('onInitReportContainer').done(function(){
            $('#dashReportContainer').removeClass('loading')
        })
    })
</script>