Fixed an error (ReferenceError: window is not defined) when Server Side Rendering (SSR) is running. (#210)

Author: movicat

resources/js/hooks/use-mobile.tsx

@@ -2,20 +2,35 @@ import { useSyncExternalStore } from 'react';
 
 const MOBILE_BREAKPOINT = 768;
 
-const mql = window.matchMedia(`(max-width: ${MOBILE_BREAKPOINT - 1}px)`);
+const mql =
+    typeof window === 'undefined'
+        ? undefined
+        : window.matchMedia(`(max-width: ${MOBILE_BREAKPOINT - 1}px)`);
 
 function mediaQueryListener(callback: (event: MediaQueryListEvent) => void) {
+    if (!mql) {
+        return () => {};
+    }
+
     mql.addEventListener('change', callback);
 
     return () => {
         mql.removeEventListener('change', callback);
     };
 }
 
-function isSmallerThanBreakpoint() {
-    return mql.matches;
+function isSmallerThanBreakpoint(): boolean {
+    return mql?.matches ?? false;
+}
+
+function getServerSnapshot(): boolean {
+    return false;
 }
 
-export function useIsMobile() {
-    return useSyncExternalStore(mediaQueryListener, isSmallerThanBreakpoint);
+export function useIsMobile(): boolean {
+    return useSyncExternalStore(
+        mediaQueryListener,
+        isSmallerThanBreakpoint,
+        getServerSnapshot
+    );
 }