(function($) {

  $.fn.visible = function(partial) {

      var $t            = $(this),
          $w            = $(window),
          viewTop       = $w.scrollTop(),
          viewBottom    = viewTop + $w.height(),
          _top          = $t.offset().top,
          _bottom       = _top + $t.height(),
          compareTop    = partial === true ? _bottom : _top,
          compareBottom = partial === true ? _top : _bottom;

    return ((compareBottom <= viewBottom) && (compareTop >= viewTop));

  };

})(jQuery);

var win = $(window);

var allMods = $(".bubble-chat");
var msgText = $(".text");

allMods.each(function(i, el) {
  var el = $(el);
  if (el.visible(true)) {
    el.addClass("already-visible");
    msgText.css('display', 'block');
}

    if(el.hasClass("already-visible")) {
        el.css('display', 'none')};
})


win.scroll(function(event) {

  allMods.each(function(i, el) {
    var el = $(el);
    if (el.visible(true)) {
      el.addClass("come-in");
      el.delay(3000);
      el.queue(function (next) {
        $(this).css('display', 'none');
        msgText.css('display', 'block');
        next();
    });
}});