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Display footer if page is not scrollable

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This commit is contained in:
Jacob 2024-03-31 04:25:30 +02:00
parent 0bc16f777e
commit bc643ce12f
1 changed files with 25 additions and 0 deletions
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25
index.js
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@ -1,7 +1,32 @@
function is_scrollable(el) { /* https://www.geeksforgeeks.org/how-to-check-if-a-scrollbar-is-visible/ */
var y1 = el.scrollTop;
el.scrollTop += 1;
var y2 = el.scrollTop;
el.scrollTop -= 1;
var y3 = el.scrollTop;
el.scrollTop = y1;
var x1 = el.scrollLeft;
el.scrollLeft += 1;
var x2 = el.scrollLeft;
el.scrollLeft -= 1;
var x3 = el.scrollLeft;
el.scrollLeft = x1;
return {
h: x1 !== x2 || x2 !== x3,
v: y1 !== y2 || y2 !== y3
}
}
window.onload = function() {
var footer = document.getElementById("footer");
footer.style.display = "none";
if (is_scrollable(document.documentElement)) {
footer.style.display = "block";
}
}
window.onscroll = function() {