um-scro…=js&languageId=es_ES&t=1790588016000

js um.es collected 2026-10-01 08:29:27 UTC 898 bytes, 31 lines download raw bytes

1/*1790588016000*/
2document.addEventListener('DOMContentLoaded', function() {
3    const scrollBtn = document.getElementById('scrollToTop');
4    
5    // FunciÃ³n para evitar spam de eventos scroll
6    let ticking = false;
7    function updateVisibility() {
8        if (window.scrollY > 300) {
9            scrollBtn.classList.add('scroll-to-top--visible');
10        } else {
11            scrollBtn.classList.remove('scroll-to-top--visible');
12        }
13        ticking = false;
14    }
15    
16    // Muestra/oculta botÃ³n segÃºn scroll
17    window.addEventListener('scroll', function() {
18        if (!ticking) {
19            requestAnimationFrame(updateVisibility);
20            ticking = true;
21        }
22    });
23    
24    // Click para desplazarse al inicio
25    scrollBtn.addEventListener('click', function() {
26        window.scrollTo({
27            top: 0,
28            behavior: 'smooth'
29        });
30    });
31});

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