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Ralentir les animations ASCII si la media feature prefers-reduced-motion is activée
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Tixie Salander 2024-06-10 11:30:14 +02:00
parent 4978b26ef6
commit 351931fdeb
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1 changed files with 47 additions and 44 deletions
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91
static/script-bon.js
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@ -1,44 +1,47 @@
// dictionary to keep track of frame count for each animation // dictionary to keep track of frame count for each animation
let frameCounts = {}; let frameCounts = {};
function animate(id, delay) { function animate(id, delay) {
// get the container and frames for the amination // get the container and frames for the amination
const container = document.getElementById(id); const container = document.getElementById(id);
const frames = container.children; const frames = container.children;
// set up the frame counter // set up the frame counter
frameCounts[id] = 0; frameCounts[id] = 0;
// hide all frames except for the first // hide all frames except for the first
frames[0].style.display = "flex"; frames[0].style.display = "flex";
for (let i = 1; i < frames.length; i++) { for (let i = 1; i < frames.length; i++) {
frames[i].style.display = "none"; frames[i].style.display = "none";
} }
// start the animation // start the animation
const interval = setInterval(updateAnimation, delay, id, frames, frames.length); const interval = setInterval(updateAnimation, delay, id, frames, frames.length);
} }
function updateAnimation(id, frames, totalFrames) { function updateAnimation(id, frames, totalFrames) {
// increment the frame counter for the given id // increment the frame counter for the given id
frameCounts[id] = (frameCounts[id] + 1) % totalFrames; frameCounts[id] = (frameCounts[id] + 1) % totalFrames;
// show the next frame // show the next frame
frames[frameCounts[id]].style.display = "flex"; frames[frameCounts[id]].style.display = "flex";
// hide the previous frame // hide the previous frame
if (frameCounts[id] == 0) { if (frameCounts[id] == 0) {
frames[totalFrames - 1].style.display = "none"; frames[totalFrames - 1].style.display = "none";
} else { } else {
frames[frameCounts[id] - 1].style.display = "none"; frames[frameCounts[id] - 1].style.display = "none";
} }
} }
animate("illustration-accueil", 500); // If the user have a setting on their device to minimize the amount of non-essential motion
animate("rennes", 1000); const preferReduceMotion = window.matchMedia("(prefers-reduced-motion)").matches;
animate("orsay", 2000);
animate("parterre", 1500); animate("illustration-accueil", preferReduceMotion ? 1500 : 500); // Reduce framerate if use preference is to reduce motion
animate("rennes", preferReduceMotion ? 3000 : 1000); // Reduce framerate if use preference is to reduce motion
animate("orsay", preferReduceMotion ? 4000 : 2000); // Reduce framerate if use preference is to reduce motion
animate("parterre", 1500);