add custom class to bootstrap3 popover code example

Example 1: bootstrap popover on dynamic element

var popOverSettings = {
    placement: 'bottom',
    container: 'body',
    html: true,
    selector: '[rel="popover"]', //Sepcify the selector here
    content: function () {
        return $('#popover-content').html();
    }
}

$('body').popover(popOverSettings);

Example 2: popover bootstrap 3

<a tabindex="0" class="btn btn-lg btn-danger" role="button" data-toggle="popover" data-trigger="hover" title="Dismissible popover" data-content="And here's some amazing content. It's very engaging. Right?">Dismissible popover</a>