HtmlPage: fix a bug where async script may not be executed

duonglaiquang · rbri · commit b0ba772837b5 · 2026-03-13T17:17:04.000+01:00
diff --git a/src/main/java/org/htmlunit/html/HtmlPage.java b/src/main/java/org/htmlunit/html/HtmlPage.java
@@ -260,6 +260,8 @@ public void initialize() throws IOException, FailingHttpStatusCodeException {
             executeEventHandlersIfNeeded(Event.TYPE_READY_STATE_CHANGE);
         }
 
+        executePostponedScriptsIfNeeded();
+
         executeDeferredScriptsIfNeeded();
 
         executeEventHandlersIfNeeded(Event.TYPE_DOM_DOCUMENT_LOADED);
@@ -1477,6 +1479,13 @@ private String getRefreshStringOrNull() {
         return getWebResponse().getResponseHeaderValue("Refresh");
     }
 
+    private void executePostponedScriptsIfNeeded() {
+        if (!getWebClient().isJavaScriptEnabled()) {
+            return;
+        }
+        getWebClient().getJavaScriptEngine().processPostponedActions();
+    }
+
     /**
      * Executes any deferred scripts, if necessary.
      */
diff --git a/src/test/java/org/htmlunit/html/HtmlPageTest.java b/src/test/java/org/htmlunit/html/HtmlPageTest.java
@@ -1973,4 +1973,25 @@ public void getBaseUrl() throws Exception {
         page = loadPage(getBrowserVersion(), html, null, new URL(URL_FIRST + path));
         assertEquals(URL_FIRST.toExternalForm() + path, page.getBaseURL().toExternalForm());
     }
+
+    /**
+     * @throws Exception if an error occurs
+     */
+    @Test
+    public void asyncScriptExecutedWithoutEventHandlers() throws Exception {
+        final String html = DOCTYPE_HTML
+            + "<html><head>\n"
+            + "<script async src='async.js'></script>\n"
+            + "</head><body></body></html>";
+
+        final WebClient client = getWebClient();
+        final MockWebConnection webConnection = new MockWebConnection();
+        webConnection.setDefaultResponse(html);
+        webConnection.setResponse(new URL(URL_FIRST, "async.js"),
+                "document.title = 'async-executed';", "text/javascript");
+        client.setWebConnection(webConnection);
+
+        final HtmlPage page = client.getPage(URL_FIRST);
+        assertEquals("async-executed", page.getTitleText());
+    }
 }
