apply css to grandparent div when slide is active

Question

I have a carousel on my homepage. When the third carousel appears, the carousel buttons div class="rotator-controls" move down due to the image taking space. My goal here is to keep this div the same height as the other 4. Which means that when the <span> (index 2) of the grandchild div <div class="rotator-pagination"> is active, I apply the correct css to the <div class="rotator-controls"> (e.g. bottom:60px). As the carousel is jQuery cycle 2, when the span is active it has the class cycle-pager-active.

I have tried using domcontentloaded. i.e.

document.addEventListener("DOMContentLoaded", function() {
var span = document.querySelector("#homepage-rotator > div.banner.cycle-slide.cycle-slide-active > div > div.banner-content-area > div.rotator-controls > div.rotator-pagination").children[2];

if (jQuery(span).hasClass("cycle-pager-active")){
var grandPDiv = document.querySelector("div.rotator-controls");
grandPDiv.style.bottom = "-60px";
}
});

This does not work. But if I do this in the console, and wait for the 3rd carousel to be acitve, using jQuery(span).hasClass("cycle-pager-active") returns true. How do i apply css (to its grandparent element) only when the span element is active?

Answer 1

Try this

.banner-content-area {
    min-height: 440px;
}

if not work then add min-height: 440px!important;

Answer 2

This works perfectly:

.banner-content-area {
    min-height: 440px;
}