fix: console errors from premature colorbox resize calls

Author: lokesh

openlibrary/components/ObservationForm/Utils.js

@@ -8,6 +8,12 @@ export function decodeAndParseJSON(str) {
     return JSON.parse(decodeURIComponent(str));
 }
 
+/*
+    window.$ is a jQuery object
+    window.$.colorbox is a jQuery plugin
+*/
 export function resizeColorbox() {
-    window.$.colorbox.resize();
+    if (window.$ && window.$.colorbox && typeof window.$.colorbox.resize === 'function') {
+        window.$.colorbox.resize();
+    }
 }