1 files changed, 44 insertions, 0 deletions
diff --git a/docs/components/usePrefersReducedMotion.tsx b/docs/components/usePrefersReducedMotion.tsx
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+++ b/docs/components/usePrefersReducedMotion.tsx
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+import { useState, useEffect } from "react";
+
+const QUERY = "(prefers-reduced-motion: no-preference)";
+const isRenderingOnServer = typeof window === "undefined";
+/**
+ * All code here from https://www.joshwcomeau.com/snippets/react-hooks/use-prefers-reduced-motion/
+ */
+const getInitialState = () => {
+  // For our initial server render, we won't know if the user
+  // prefers reduced motion, but it doesn't matter. This value
+  // will be overwritten on the client, before any animations
+  // occur.
+  return isRenderingOnServer ? true : !window.matchMedia(QUERY).matches;
+};
+
+/**
+ * Checks the user's device setting for `prefers-reduced-motion`.
+ * Use this if you can't use a media query in CSS.
+ *
+ * From https://www.joshwcomeau.com/snippets/react-hooks/use-prefers-reduced-motion/
+ */
+export function usePrefersReducedMotion(): boolean {
+  const [prefersReducedMotion, setPrefersReducedMotion] =
+    useState(getInitialState);
+  useEffect(() => {
+    const mediaQueryList = window.matchMedia(QUERY);
+    const listener = (event: MediaQueryListEvent) => {
+      setPrefersReducedMotion(!event.matches);
+    };
+    if (mediaQueryList.addEventListener) {
+      mediaQueryList.addEventListener("change", listener);
+    } else {
+      mediaQueryList.addListener(listener);
+    }
+    return () => {
+      if (mediaQueryList.removeEventListener) {
+        mediaQueryList.removeEventListener("change", listener);
+      } else {
+        mediaQueryList.removeListener(listener);
+      }
+    };
+  }, []);
+  return prefersReducedMotion;
+}