Add indexv2.js

indexv2.js

@@ -0,0 +1,42 @@
+function hideHeaderOnScroll() {
+  const header = document.querySelector('.header__mobile');
+  if (!header) return;
+  
+  let lastScrollY = window.scrollY;
+  let offset = 0;
+  const headerHeight = header.offsetHeight;
+  
+  function onScroll() {
+    const currentScroll = window.scrollY;
+    const diff = currentScroll - lastScrollY;
+    
+    offset += diff;
+    offset = Math.max(0, Math.min(offset, headerHeight));
+    
+    header.style.transform = `translateY(-${offset}px)`;
+    lastScrollY = currentScroll;
+  }
+  
+  function onTouchEnd() {
+    const visiblePart = headerHeight - offset;
+    const visiblePercentage = (visiblePart / headerHeight) * 100;
+    header.style.transition = '0.2s cubic-bezier(0.78, 0, 0.22, 1) transform';
+    header.addEventListener('transitionend', () => {
+      header.style.transition = 'none';
+    }, { once: true });
+    
+    
+    if (visiblePercentage > 50) {
+      offset = 0;
+      header.style.transform = 'translateY(0)';
+    } else {
+      offset = headerHeight;
+      header.style.transform = `translateY(-${headerHeight}px)`;
+    }
+    
+  }
+  
+  window.addEventListener('scroll', onScroll);
+  window.addEventListener('touchend', onTouchEnd);
+}
+document.addEventListener('DOMContentLoaded', hideHeaderOnScroll);