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perf: optimize website animations and transitions for better performance #331
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,58 @@ | ||
| <script is:inline> | ||
| // Slow scroll configuration - change DURATION to adjust speed | ||
| const DURATION = 3000; // milliseconds for scroll animation | ||
|
|
||
| function setupSlowScroll() { | ||
| const scrollable = document.querySelector('.scrollable-inner'); | ||
| console.log('SlowScroll: scrollable element found:', !!scrollable); | ||
| if (!scrollable) return; | ||
|
|
||
| let animationId = null; | ||
| let startY = scrollable.scrollTop; | ||
| let targetY = scrollable.scrollTop; | ||
| let startTime = null; | ||
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| function easeOutCubic(t) { | ||
| return 1 - Math.pow(1 - t, 3); | ||
| } | ||
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| function animate(currentTime) { | ||
| if (!startTime) startTime = currentTime; | ||
| const elapsed = currentTime - startTime; | ||
| const progress = Math.min(elapsed / DURATION, 1); | ||
|
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| const easedProgress = easeOutCubic(progress); | ||
| scrollable.scrollTop = startY + (targetY - startY) * easedProgress; | ||
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| if (progress < 1) { | ||
| animationId = requestAnimationFrame(animate); | ||
| } else { | ||
| animationId = null; | ||
| startY = scrollable.scrollTop; | ||
| } | ||
| } | ||
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| scrollable.addEventListener('wheel', (e) => { | ||
| console.log('SlowScroll: wheel event captured'); | ||
| e.preventDefault(); | ||
| e.stopPropagation(); | ||
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| targetY += e.deltaY; | ||
| targetY = Math.max(0, Math.min(targetY, scrollable.scrollHeight - scrollable.clientHeight)); | ||
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| if (animationId === null) { | ||
| startY = scrollable.scrollTop; | ||
| startTime = null; | ||
| animationId = requestAnimationFrame(animate); | ||
| } | ||
| }, { passive: false, capture: true }); | ||
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| console.log('SlowScroll: wheel listener attached'); | ||
| } | ||
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| if (document.readyState === 'loading') { | ||
| document.addEventListener('DOMContentLoaded', setupSlowScroll); | ||
| } else { | ||
| setupSlowScroll(); | ||
| } | ||
| </script> | ||
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The
preventDefault()andstopPropagation()calls on wheel events contradict the PR's stated goal of "replacing complex custom scroll animation with native smooth scrolling." This implementation actually disables native scrolling behavior completely, which can cause accessibility issues for users with assistive technologies or non-standard input devices.Consider either:
SlowScrollcomponent if native scrolling is the intended approachscroll-behavior: smoothinstead for a standards-compliant approachThis custom scroll implementation also lacks touch event handling, which would break scrolling on mobile devices.
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