48 lines
1.5 KiB
JavaScript
48 lines
1.5 KiB
JavaScript
// dictionary to keep track of frame count for each animation
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let frameCounts = {};
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function animate(id, delay) {
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// get the container and frames for the amination
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const container = document.getElementById(id);
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const frames = container.children;
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// set up the frame counter
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frameCounts[id] = 0;
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// hide all frames except for the first
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frames[0].style.display = "flex";
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for (let i = 1; i < frames.length; i++) {
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frames[i].style.display = "none";
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}
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// start the animation
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const interval = setInterval(updateAnimation, delay, id, frames, frames.length);
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}
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function updateAnimation(id, frames, totalFrames) {
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// increment the frame counter for the given id
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frameCounts[id] = (frameCounts[id] + 1) % totalFrames;
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// show the next frame
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frames[frameCounts[id]].style.display = "flex";
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// hide the previous frame
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if (frameCounts[id] == 0) {
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frames[totalFrames - 1].style.display = "none";
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} else {
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frames[frameCounts[id] - 1].style.display = "none";
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}
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}
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// If the user have a setting on their device to minimize the amount of non-essential motion
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const preferReduceMotion = window.matchMedia("(prefers-reduced-motion)").matches;
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animate("illustration-accueil", preferReduceMotion ? 1500 : 500); // Reduce framerate if use preference is to reduce motion
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animate("rennes", preferReduceMotion ? 3000 : 1000); // Reduce framerate if use preference is to reduce motion
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animate("orsay", preferReduceMotion ? 4000 : 2000); // Reduce framerate if use preference is to reduce motion
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animate("parterre", 1500);
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