MediaWiki
MediaWiki:Foreground.js
From Grouse House Wiki
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/* Scroll to top */ let scrollbutton = document.getElementById("scrollToTop"); window.onscroll = function() {scrollFunction()}; function scrollFunction() { if (document.body.scrollTop > 20 || document.documentElement.scrollTop > 20) { scrollbutton.style.display = "block"; } else { scrollbutton.style.display = "none"; } } function topFunction() { document.body.scrollTop = 0; document.documentElement.scrollTop = 0; }