            The ScrollManager class adds a scroll event listener if needed and handles the update of the scroll values.
                                                </p>
                                                <p class="api-item-examples">
                                                    <a href="https://github.com/martinlaxenaire/curtainsjs/blob/master/src/utils/ScrollManager.js" title="ScrollManager class source code" target="_blank">Source code</a>.
                                         