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Warn when view transitions run on a prefer-reduced-motion device #10222

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Feb 26, 2024
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5 changes: 5 additions & 0 deletions .changeset/wicked-eyes-prove.md
Original file line number Diff line number Diff line change
@@ -0,0 +1,5 @@
---
"astro": patch
---

Adds a warning in DEV mode when using view transitions on a device with prefer-reduced-motion enabled.
3 changes: 3 additions & 0 deletions packages/astro/components/ViewTransitions.astro
Original file line number Diff line number Diff line change
Expand Up @@ -51,6 +51,9 @@ const { fallback = 'animate' } = Astro.props;
}

if (supportsViewTransitions || getFallback() !== 'none') {
if (import.meta.env.DEV && window.matchMedia('(prefers-reduced-motion)').matches) {
console.warn(`[transitions]: all view transition animations, including fallback animation, are disabled as this device has the prefer-reduced-motion setting enabled.`);
}
document.addEventListener('click', (ev) => {
let link = ev.target;
if (ev.composed) {
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