[FIX] No crash if ResizeObserver is not available.

Author: tomisu

index.js

@@ -9,7 +9,7 @@ const isEdge = /Edge\/\d./i.test(navigator.userAgent);
 // This needs a polyfill to work on all browsers. The polyfill is not included in order to keep the package light.
 function useResizeObserver(ref, callback) {
   useEffect(() => {
-    if (ResizeObserver) {
+    if (window.ResizeObserver) {
       const resizeObserver = new ResizeObserver((entries) => {
         callback(entries[0].contentRect);
       });

package.json

@@ -1,6 +1,6 @@
 {
   "name": "react-element-scroll-hook",
-  "version": "1.0.7",
+  "version": "1.0.8",
   "description": "A react hook to use the scroll information of an element",
   "main": "index.js",
   "repository": {