LibWeb: Wait for initial navigation to complete before modifying iframe

If initial src of an iframe is "about:blank", it does synchronous navigation that is not supposed to be interleaved by other navigation or usage of Document.open(). Fixes crashing in navigation on https://twinings.co.uk/
Author: https://github.com/kalenikaliaksandr Commit: a3149c1ce9 Pull-request: https://github.com/SerenityOS/serenity/pull/23889 Reviewed-by: https://github.com/awesomekling
2025-08-01 21:59:07 +00:00 · 2024-04-08 05:36:02 +02:00 · 2024-04-08 05:36:02 +02:00 · a3149c1ce9 · 2024-07-17 03:05:16 +09:00
commit a3149c1ce9
parent aada06757b
5 changed files with 40 additions and 0 deletions
--- a/Tests/LibWeb/Text/input/navigation/populate-iframe-using-document-write.html
+++ b/Tests/LibWeb/Text/input/navigation/populate-iframe-using-document-write.html
@ -0,0 +1,22 @@
+<!DOCTYPE html>
+<script src="../include.js"></script>
+<body></body>
+<script>
+    const iframe = document.createElement("iframe");
+    document.body.appendChild(iframe);
+
+    const iframeDocument = iframe.contentDocument;
+
+    iframeDocument.open();
+    iframeDocument.write(
+        "<!DOCTYPE html><html><head><title>Iframe Content</title></head><body>"
+    );
+    iframeDocument.write("<h1>Hello</h1>");
+    iframeDocument.write("<p>from iframe</p>");
+    iframeDocument.write("</body></html>");
+    iframeDocument.close();
+
+    test(() => {
+        println("PASS (didn't crash)");
+    })
+</script>