mailtrain/views/partials/modal-carousel.hbs

<style>
    #carousel-{{cls}} > * {
        z-index: 2;
    }
    #carousel-{{cls}}:after {
        display: block;
        position: absolute;
        z-index: 1;
        top: 0;
        width: 100%;
        line-height: 500px;
        text-align: center;
        content: 'Loading ...';
    }
</style>

<div class="modal fade {{cls}}" tabindex="-1" role="dialog">
    <div class="modal-dialog" style="width: auto; max-width: 1026px !important;" role="document">
        <div class="modal-content">
            <div class="modal-header">
                <button type="button" class="close" data-dismiss="modal" aria-label="Close"><span aria-hidden="true">&times;</span></button>
                <h4 class="modal-title">{{#translate}}{{title}}{{/translate}}</h4>
            </div>
            <div id="carousel-{{cls}}" class="carousel slide" data-interval="false" style="min-height: 500px;">
                <!-- Indicators -->
                <ol class="carousel-indicators">
                    <li data-target="#carousel-{{cls}}" data-slide-to="0" class="active"></li>
                    <li data-target="#carousel-{{cls}}" data-slide-to="1"></li>
                    <li data-target="#carousel-{{cls}}" data-slide-to="2"></li>
                </ol>

                <!-- Wrapper for slides -->
                <div class="carousel-inner" role="listbox">

                    {{#if img01}}
                        <div class="item active">
                            <img data-src="{{img01}}">
                        </div>
                    {{/if}}

                    {{#if img02}}
                        <div class="item">
                            <img data-src="{{img02}}">
                        </div>
                    {{/if}}

                    {{#if img03}}
                        <div class="item">
                            <img data-src="{{img03}}">
                        </div>
                    {{/if}}

                    {{#if img04}}
                        <div class="item">
                            <img data-src="{{img04}}">
                        </div>
                    {{/if}}

                    {{#if img05}}
                        <div class="item">
                            <img data-src="{{img05}}">
                        </div>
                    {{/if}}

                    {{#if img06}}
                        <div class="item">
                            <img data-src="{{img06}}">
                        </div>
                    {{/if}}

                    {{#if img07}}
                        <div class="item">
                            <img data-src="{{img07}}">
                        </div>
                    {{/if}}

                    {{#if img08}}
                        <div class="item">
                            <img data-src="{{img08}}">
                        </div>
                    {{/if}}

                    {{#if img09}}
                        <div class="item">
                            <img data-src="{{img09}}">
                        </div>
                    {{/if}}

                    {{#if img10}}
                        <div class="item">
                            <img data-src="{{img10}}">
                        </div>
                    {{/if}}

                </div>

                {{#if img02}}
                    <!-- Controls -->
                    <a class="left carousel-control" href="#carousel-{{cls}}" role="button" data-slide="prev">
                        <span class="glyphicon glyphicon-chevron-left" aria-hidden="true"></span>
                        <span class="sr-only">Previous</span>
                    </a>
                    <a class="right carousel-control" href="#carousel-{{cls}}" role="button" data-slide="next">
                        <span class="glyphicon glyphicon-chevron-right" aria-hidden="true"></span>
                        <span class="sr-only">Next</span>
                    </a>
                {{/if}}
            </div>
        </div>
    </div>
</div>

<script>
    document.addEventListener('DOMContentLoaded', function() {
        $('.modal.{{cls}}').on('show.bs.modal', function() {
            $(this).find('img[data-src]').each(function() {
                $(this).attr('src', $(this).data('src'));
                $(this).removeAttr('data-src');
            });
        });
    });
</script>