Merge pull request 'Ralentir les animations ASCII si on détecte que l'utilisateur'trice a demandé au système de minimiser la quantité d'animation ou de mouvement.' (#44) from feat/a11y into preprod

Reviewed-on: https://git.deuxfleurs.fr/Deuxfleurs/site/pulls/44

1 files changed, 47 insertions, 44 deletions

diff --git a/static/script-bon.js b/static/script-bon.js
index 5458968..af03d36 100644
--- a/static/script-bon.js
+++ b/static/script-bon.js
@@ -1,44 +1,47 @@
-// dictionary to keep track of frame count for each animation

-let frameCounts = {};

-

-function animate(id, delay) {

-

-  // get the container and frames for the amination

-  const container = document.getElementById(id);

-  const frames = container.children;

-

-  // set up the frame counter

-  frameCounts[id] = 0;

-

-  // hide all frames except for the first

-  frames[0].style.display = "flex";

-  for (let i = 1; i < frames.length; i++) {

-    frames[i].style.display = "none";

-  }

-

-  // start the animation

-  const interval = setInterval(updateAnimation, delay, id, frames, frames.length);

-

-}

-

-function updateAnimation(id, frames, totalFrames) {

-

-  // increment the frame counter for the given id

-  frameCounts[id] = (frameCounts[id] + 1) % totalFrames;

-

-  // show the next frame

-  frames[frameCounts[id]].style.display = "flex";

-

-  // hide the previous frame

-  if (frameCounts[id] == 0) {

-    frames[totalFrames - 1].style.display = "none";

-  } else {

-    frames[frameCounts[id] - 1].style.display = "none";

-  }

-

-}

-

-animate("illustration-accueil", 500);

-animate("rennes", 1000);

-animate("orsay", 2000);

-animate("parterre", 1500);
\ No newline at end of file
+// dictionary to keep track of frame count for each animation
+let frameCounts = {};
+
+function animate(id, delay) {
+
+  // get the container and frames for the amination
+  const container = document.getElementById(id);
+  const frames = container.children;
+
+  // set up the frame counter
+  frameCounts[id] = 0;
+
+  // hide all frames except for the first
+  frames[0].style.display = "flex";
+  for (let i = 1; i < frames.length; i++) {
+    frames[i].style.display = "none";
+  }
+
+  // start the animation
+  const interval = setInterval(updateAnimation, delay, id, frames, frames.length);
+
+}
+
+function updateAnimation(id, frames, totalFrames) {
+
+  // increment the frame counter for the given id
+  frameCounts[id] = (frameCounts[id] + 1) % totalFrames;
+
+  // show the next frame
+  frames[frameCounts[id]].style.display = "flex";
+
+  // hide the previous frame
+  if (frameCounts[id] == 0) {
+    frames[totalFrames - 1].style.display = "none";
+  } else {
+    frames[frameCounts[id] - 1].style.display = "none";
+  }
+
+}
+
+// If the user have a setting on their device to minimize the amount of non-essential motion
+const preferReduceMotion = window.matchMedia("(prefers-reduced-motion)").matches;
+
+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);