8250779: Anchor is ignored when reloading a page in Chrome

Reviewed-by: prappo

Author: hns

src/jdk.javadoc/share/classes/jdk/javadoc/internal/doclets/toolkit/resources/script.js

@@ -103,24 +103,26 @@ function indexFilesLoaded() {
 }
 
 // Workaround for scroll position not being included in browser history (8249133)
-document.addEventListener("DOMContentLoaded", function() {
+document.addEventListener("DOMContentLoaded", function(e) {
     var contentDiv = document.querySelector("div.flex-content");
-    window.onpopstate = function(e) {
+    window.addEventListener("popstate", function(e) {
         if (e.state !== null) {
             contentDiv.scrollTop = e.state;
         }
-    }
-    window.onhashchange = function(e) {
+    });
+    window.addEventListener("hashchange", function(e) {
         history.replaceState(contentDiv.scrollTop, document.title);
-    }
-    contentDiv.onscroll = function(e) {
+    });
+    contentDiv.addEventListener("scroll", function(e) {
         var timeoutID;
         if (!timeoutID) {
             timeoutID = setTimeout(function() {
                 history.replaceState(contentDiv.scrollTop, document.title);
                 timeoutID = null;
             }, 100);
         }
+    });
+    if (!location.hash) {
+        history.replaceState(contentDiv.scrollTop, document.title);
     }
-    history.replaceState(contentDiv.scrollTop, document.title);
 });