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| (function () {
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| var sidebarId = 'mw-navigation';
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|
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| function saveSidebarScrollPosition() {
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| var scrollPosition = document.getElementById(sidebarId).scrollTop;
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| var currentPage = window.location.href;
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| sessionStorage.setItem(currentPage, scrollPosition);
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| }
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|
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| function restoreSidebarScrollPosition() {
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| var currentPage = window.location.href;
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| var scrollPosition = sessionStorage.getItem(currentPage);
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| if (scrollPosition !== null) {
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| document.getElementById(sidebarId).scrollTop = parseInt(scrollPosition);
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| }
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| }
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|
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| // Create a MutationObserver to detect changes in the sidebar
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| var observer = new MutationObserver(function (mutations) {
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| mutations.forEach(function (mutation) {
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| if (mutation.type === 'attributes' && mutation.attributeName === 'class') {
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| saveSidebarScrollPosition();
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| }
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| });
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| });
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|
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| // Configure the observer to watch for class attribute changes in the sidebar
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| var observerConfig = {
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| attributes: true,
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| attributeFilter: ['class'],
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| subtree: true
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| };
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|
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| // Start observing the sidebar element
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| var sidebarElement = document.getElementById(sidebarId);
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| if (sidebarElement) {
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| observer.observe(sidebarElement, observerConfig);
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| }
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|
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| // Restore scroll position when the page is loaded
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| window.addEventListener('load', restoreSidebarScrollPosition);
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| })();
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