Typescript conversion.

src/components/hooks/useEscapeKey.ts

@@ -0,0 +1,21 @@
+import { useEffect, useCallback, KeyboardEvent } from 'react';
+
+export function useEscapeKey(handler: (event: KeyboardEvent) => void) {
+  const escFunction = useCallback((event: KeyboardEvent) => {
+    if (event.key === 'Escape') {
+      handler(event);
+    }
+  }, []);
+
+  useEffect(() => {
+    document.addEventListener('keydown', escFunction as any, false);
+
+    return () => {
+      document.removeEventListener('keydown', escFunction as any, false);
+    };
+  }, [escFunction]);
+
+  return null;
+}
+
+export default useEscapeKey;