feat(web): add beforeunload event (#14830)

This commit adds the 'beforeunload' event.

Co-authored-by: Bartek Iwańczuk <biwanczuk@gmail.com>

1 files changed, 8 insertions, 1 deletions

diff --git a/cli/standalone.rs b/cli/standalone.rs
index d66eb7694..50baf70ea 100644
--- a/cli/standalone.rs
+++ b/cli/standalone.rs
@@ -316,7 +316,14 @@ pub async fn run(
   );
   worker.execute_main_module(main_module).await?;
   worker.dispatch_load_event(&located_script_name!())?;
-  worker.run_event_loop(true).await?;
+
+  loop {
+    worker.run_event_loop(false).await?;
+    if !worker.dispatch_beforeunload_event(&located_script_name!())? {
+      break;
+    }
+  }
+
   worker.dispatch_unload_event(&located_script_name!())?;
   std::process::exit(0);
 }