Scholar: floating scroll-to-top button
Adds a floating button in the bottom-right corner that appears after scrolling and smoothly returns to the top of the list.
Code to copy
// Floating scroll-to-top button
(function () {
if (document.getElementById('jzSchTop')) { return; }
var btn = document.createElement('button');
btn.id = 'jzSchTop';
btn.type = 'button';
btn.textContent = '↑';
btn.title = 'Scroll to top';
btn.style.cssText = [
'position:fixed', 'right:24px', 'bottom:24px',
'width:46px', 'height:46px', 'border-radius:50%',
'border:0', 'background:#1a73e8', 'color:#fff',
'font-size:22px', 'font-weight:700', 'cursor:pointer',
'box-shadow:0 4px 12px rgba(0,0,0,0.25)', 'z-index:99999',
'opacity:0', 'transition:opacity .2s'
].join(';');
btn.addEventListener('click', function () {
window.scrollTo({ top: 0, behavior: 'smooth' });
});
document.body.appendChild(btn);
window.addEventListener('scroll', function () {
btn.style.opacity = window.scrollY > 400 ? '1' : '0';
btn.style.pointerEvents = window.scrollY > 400 ? 'auto' : 'none';
}, { passive: true });
})();How to use this example
- Copy the code with the button above.
- Install JustZix (2 minutes) and open the extension on the target page.
- Add a new rule matching that page.
- Paste the code into the rule's JavaScript panel and save — it runs on every page visit.
Rate this example
No ratings yet — be the first.