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✨feature: Update "back to top" button to work on scroll up after scroll down

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This commit is contained in:
Keith Solomon
2026-03-09 09:05:53 -05:00
parent 5b7fed2cb8
commit 9bde54a41c
1 changed files with 27 additions and 17 deletions
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static/js/components/backToTop.js
+11 -1
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@@ -6,10 +6,20 @@ class BackToTopButton extends HTMLElement {
↑ Top ↑ Top
</button> </button>
`; `;
const btn = this.querySelector('#backToTopBtn'); const btn = this.querySelector('#backToTopBtn');
let previousScrollY = window.scrollY;
window.addEventListener('scroll', () => { window.addEventListener('scroll', () => {
btn.style.display = window.scrollY > 300 ? 'block' : 'none'; const currentScrollY = window.scrollY;
const isScrollingUp = currentScrollY < previousScrollY;
const shouldShowButton = currentScrollY > 300 && isScrollingUp;
btn.style.display = shouldShowButton ? 'block' : 'none';
previousScrollY = currentScrollY;
}); });
btn.addEventListener('click', () => { btn.addEventListener('click', () => {
window.scrollTo({ top: 0, behavior: 'smooth' }); window.scrollTo({ top: 0, behavior: 'smooth' });
}); });