099bfceb7e
All checks were successful
Swaous.Asuscomm Build / Build-Docker-Image (push) Successful in 35s
48 lines
1.6 KiB
JavaScript
Executable File
48 lines
1.6 KiB
JavaScript
Executable File
function interpolate(one, frac, two) { // interpolate between two values. at frac=1, return one; at frac=0, return two.
|
|
return frac * one + (1 - frac) * two;
|
|
}
|
|
|
|
|
|
function onscroll() {
|
|
for (image of document.getElementsByClassName("sideimage")) {
|
|
let rect = image.getBoundingClientRect();
|
|
if (rect.top < 100 || rect.bottom > window.innerHeight - 100) {
|
|
image.classList.remove("visible");
|
|
}
|
|
else {
|
|
image.classList.add("visible");
|
|
}
|
|
}
|
|
let lastText;
|
|
for (text of document.querySelectorAll(".light-track > .text")) {
|
|
let rect = text.getBoundingClientRect();
|
|
if (rect.top < window.innerHeight * 3 / 4) {
|
|
if (lastText) {
|
|
lastText.style.opacity = '0';
|
|
}
|
|
}
|
|
else {
|
|
if (lastText) {
|
|
lastText.style.opacity = '1';
|
|
}
|
|
}
|
|
lastText = text;
|
|
}
|
|
let track = document.getElementById("yippee");
|
|
let track_pos = Math.max(0, (1 - (track.getBoundingClientRect().bottom - window.innerHeight) / (window.innerHeight * 2)));
|
|
let r = interpolate(255, track_pos, 0);
|
|
let g = interpolate(235, track_pos, 20);
|
|
let b = interpolate(205, track_pos, 40);
|
|
track.style.backgroundColor = "rgb(" + r + ", " + g + ", " + b + ")";
|
|
if (track_pos > 0.4) {
|
|
track.style.color = "black";
|
|
}
|
|
else {
|
|
track.style.color = "white";
|
|
}
|
|
}
|
|
onscroll();
|
|
|
|
window.addEventListener("scroll", onscroll);
|
|
window.addEventListener("wheel", onscroll);
|
|
window.addEventListener("keydown", onscroll); |