Improved greasemonkey script by adding scope

greasemonkey_autoload.js

@@ -1,33 +1,39 @@
 // ==UserScript==
 // @name     HeroSaver for HeroForge
 // @version  1
+// @description  Automatically load HeroSaver when visiting HeroForge
 // @namespace https://github.com/christofsteel/herosaver
 // @match  https://www.heroforge.com/
+// @grant        none
 // ==/UserScript==
 
-var observerOptions = {
+(function() {
-    childList: true,
+    'use strict';
-    subtree: true
-}
 
-var observer = new MutationObserver(function(mutationList, observer) {
+    var observerOptions = {
-    mutationList.forEach((mutation) => {
+        childList: true,
-        if (Array.from(mutation.removedNodes).some((element) => {
+        subtree: true
-            return element.className === "loadingScreen";
+    }
-        })) {
+
-            observer.disconnect();
+    var observer = new MutationObserver(function(mutationList, observer) {
-            var xhr=new XMLHttpRequest;
+        mutationList.forEach((mutation) => {
-            xhr.open("get","https://raw.githubusercontent.com/christofsteel/herosaver/master/herosaver.min.js",true);
+            if (Array.from(mutation.removedNodes).some((element) => {
-            xhr.onreadystatechange=function(){
+                return element.className === "loadingScreen";
-                if (xhr.readyState == 4) {
+            })) {
-                    var script=document.createElement("script");
+                observer.disconnect();
-                    script.type="text/javascript";
+                var xhr=new XMLHttpRequest;
-                    script.text=xhr.responseText;
+                xhr.open("get","https://raw.githubusercontent.com/christofsteel/herosaver/master/herosaver.min.js",true);
-                    document.body.appendChild(script)
+                xhr.onreadystatechange=function(){
-                }
+                    if (xhr.readyState == 4) {
-            };
+                        var script=document.createElement("script");
-            xhr.send(null);
+                        script.type="text/javascript";
-        }
+                        script.text=xhr.responseText;
+                        document.body.appendChild(script)
+                    }
+                };
+                xhr.send(null);
+            }
+        });
     });
-});
+    observer.observe(document.querySelector("body"), observerOptions);
-observer.observe(document.querySelector("body"), observerOptions);
+})();