'4.0.16'

Author: jknack

index.html

@@ -0,0 +1,78 @@
+document.addEventListener('DOMContentLoaded', () => {
+  const toc = document.getElementById('toc');
+  if (!toc) return;
+
+  // 1. Check the path once on load
+  const isModulesPage = window.location.pathname.includes('/modules');
+
+  const links = Array.from(toc.querySelectorAll('a'));
+  const sections = [];
+
+  links.forEach(link => {
+    const href = link.getAttribute('href');
+    if (href && href.startsWith('#')) {
+      const id = href.substring(1);
+      const target = document.getElementById(id);
+      if (target) {
+        sections.push({ link, target });
+      }
+    }
+  });
+
+  if (sections.length === 0) return;
+
+  function updateToc() {
+    const offset = 95;
+    let activeIndex = -1;
+
+    for (let i = 0; i < sections.length; i++) {
+      const bounds = sections[i].target.getBoundingClientRect();
+      if (bounds.top <= offset) {
+        activeIndex = i;
+      } else {
+        break;
+      }
+    }
+
+    const scrollY = window.scrollY || window.pageYOffset;
+
+    if ((window.innerHeight + scrollY) >= document.documentElement.scrollHeight - 10) {
+      activeIndex = sections.length - 1;
+    }
+
+    if (scrollY < 50) {
+      activeIndex = -1;
+    }
+
+    // 1. Reset all states completely
+    links.forEach(l => {
+      l.classList.remove('active');
+      let p = l.parentElement;
+      while (p && p !== toc) {
+        if (p.tagName === 'LI') p.classList.remove('expanded');
+        p = p.parentElement;
+      }
+    });
+
+    // 2. Apply the active path based on scroll position
+    if (activeIndex !== -1) {
+      const activeLink = sections[activeIndex].link;
+      activeLink.classList.add('active');
+      let p = activeLink.parentElement;
+      while (p && p !== toc) {
+        if (p.tagName === 'LI') p.classList.add('expanded');
+        p = p.parentElement;
+      }
+    }
+
+    // If we are on the modules page, ensure the first layer is ALWAYS expanded,
+    // regardless of where we are scrolled.
+    if (isModulesPage) {
+      const topLevelLis = toc.querySelectorAll('.sectlevel1 > li');
+      topLevelLis.forEach(li => li.classList.add('expanded'));
+    }
+  }
+
+  window.addEventListener('scroll', updateToc, { passive: true });
+  setTimeout(updateToc, 100);
+});