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refactor: better header scroll handling

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Kentai Radiquum 2024-09-16 12:19:24 +05:00
parent 6c0f477436
commit 2c9fb22de2
Signed by: Radiquum
GPG key ID: 858E8EE696525EED
3 changed files with 39 additions and 25 deletions
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30
static/script.js
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@ -7,8 +7,8 @@ const IMAGE_ANIMATION_DELAY = 1000;
const IMAGE_TRANSITION_DELAY = 1000;
// Header percentages
const HEADER_ACTIVATION_PERCENT = 30;
const HEADER_DEACTIVATION_PERCENT = 20;
const HEADER_ACTIVATION_PERCENT = 0.4;
const HEADER_DEACTIVATION_PERCENT = 0.8;
// THIS IS NOT CONSTANTS, BUT A GLOBAL VAR FOR TIMERS IN SONG NAME CHANGE!!!
let DELETE_INTERVAL = null;
@ -95,36 +95,24 @@ async function updatePlayingTrack() {
});
}
function getBlockScrollPosition(block_id) {
const blockHeight = document.getElementById(block_id).clientHeight;
const fullPageHeight = document.documentElement.scrollHeight - document.documentElement.clientHeight;
const restPageHeight = fullPageHeight - blockHeight;
const windowScroll = document.documentElement.scrollTop - restPageHeight;
const scrolled = (windowScroll / fullPageHeight) * 100;
if (0 < Math.floor(scrolled) ) {
return 0
} else {
return Math.floor(scrolled) * -1;
}
}
const header = document.getElementById("header");
let last_Y_pos = 0;
let header_opacity = 0;
window.onscroll = () => {
let scrollPosition = getBlockScrollPosition('section_landing');
if (scrollPosition > HEADER_ACTIVATION_PERCENT) {
let landingBlock = document.getElementById("section_landing").clientHeight;
if (window.scrollY < (landingBlock * HEADER_ACTIVATION_PERCENT)) {
header.style.display = "none";
} else {
header.style.display = "block";
}
if (window.scrollY > last_Y_pos && scrollPosition < HEADER_ACTIVATION_PERCENT) {
if (window.scrollY > last_Y_pos && window.scrollY > (landingBlock * HEADER_ACTIVATION_PERCENT)) {
header_opacity += 0.1;
} else if (window.scrollY < last_Y_pos && scrollPosition > HEADER_DEACTIVATION_PERCENT)
} else if (window.scrollY < last_Y_pos && window.scrollY < (landingBlock * HEADER_DEACTIVATION_PERCENT)) {
header_opacity -= 0.1;
last_Y_pos = window.scrollY;
}
if (header_opacity > 1) {
header_opacity = 1;
@ -132,6 +120,8 @@ window.onscroll = () => {
header_opacity = 0;
}
last_Y_pos = window.scrollY;
header.style.setProperty("--header-opacity", `${header_opacity.toFixed(2)}`);
};