Files
avrahamsociety/main.js
Lazy Hippopotamus 370041fb16 fun things
2023-06-12 10:09:49 -04:00

113 lines
3.9 KiB
JavaScript

function clamp(min, val, max) {
if (val < min) {
val = min;
}
if (val > max) {
val = max;
}
return val;
}
const scrollchecks = () => {
var el = document.getElementById("header");
el.style.backgroundPositionY = 50 + (document.documentElement.scrollTop/el.scrollHeight) / 2 * 100 + "%";
Array.from(document.getElementsByClassName("scrolly")).forEach(el => {
let box = el.getBoundingClientRect();
if (box.bottom < 0 || box.top >= window.innerHeight) {
el.classList.add("scrolly-out");
el.classList.remove("scrolly-in");
el.classList.remove("scrolly-onedge");
}
else {
el.classList.remove("scrolly-out");
el.classList.add("scrolly-in");
el.classList.add("scrolly-entered");
if (box.top <= 0 || box.bottom >= window.innerHeight) {
el.classList.add("scrolly-onedge");
}
else {
el.classList.remove("scrolly-onedge");
}
}
if (box.top + box.height / 2 <= window.innerHeight / 2) {
el.classList.add("scrolly-tophalf");
el.classList.remove("scrolly-bottomhalf");
}
else {
el.classList.remove("scrolly-tophalf");
el.classList.add("scrolly-bottomhalf");
}
});
var perc = clamp(0, document.getElementById("outer").scrollTop / (window.innerHeight / 2), 1);
document.querySelector("#headin > h1").style.fontSize = 2 + 4 * (1 - perc) + "em";
document.querySelector("#links").style.opacity = perc;
//document.querySelector("#carousel").style.opacity = perc;
};
window.addEventListener("scroll", scrollchecks);
window.addEventListener("scrollend", scrollchecks);
window.addEventListener("wheel", scrollchecks);
window.addEventListener("resize", scrollchecks);
window.addEventListener("load", scrollchecks);
window.addEventListener("touchmove", scrollchecks);
setInterval(scrollchecks, 250); // Computers are fast and scrolling in JavaScript is dumb. Shoot me.
function getCarousel(id) {
var carousEL = document.querySelector(".carousel#" + id);
var carousel = {
element: carousEL,
delCalls: 0,
selected() {
return carousel.element.querySelector(".selected");
},
next(domarkate) {
var sel = carousel.selected();
sel.classList.remove("selected");
var newSel = sel.nextElementSibling;
if (!newSel) {
newSel = carousel.element.firstElementChild;
}
newSel.classList.add("selected");
carousel.display();
if (domarkate != true) {
carousel.delCalls = 3;
}
},
nextAnim() {
if (carousel.delCalls == 0) {
carousel.next(true);
}
else {
carousel.delCalls--;
}
},
back(domarkate) {
var sel = carousel.selected();
sel.classList.remove("selected");
var newSel = sel.previousElementSibling;
if (!newSel) {
newSel = carousel.element.lastElementChild;
}
newSel.classList.add("selected");
carousel.display();
if (domarkate != true) {
carousel.delCalls = 3;
}
},
display() {
var bbox = carousel.selected().getBoundingClientRect();
carousel.element.scrollBy({
left: (bbox.left - window.innerWidth/2 + bbox.width/2),
top: 0,
behavior: "smooth"
});
}
}
carousEL.previousElementSibling.onclick = carousel.back;
carousEL.nextElementSibling.onclick = carousel.next;
return carousel;
}
var carousel_1 = getCarousel("carousel_1");
carousel_1.display();
setInterval(carousel_1.nextAnim, 2000);