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

This commit adds the 'beforeunload' event.

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

1 files changed, 24 insertions, 0 deletions

diff --git a/core/ops_builtin_v8.rs b/core/ops_builtin_v8.rs
index 7f0c58212..4bc80faa5 100644
--- a/core/ops_builtin_v8.rs
+++ b/core/ops_builtin_v8.rs
@@ -47,6 +47,7 @@ pub(crate) fn init_builtins_v8() -> Vec<OpDecl> {
     op_op_names::decl(),
     op_apply_source_map::decl(),
     op_set_format_exception_callback::decl(),
+    op_event_loop_has_more_work::decl(),
   ]
 }
 
@@ -786,3 +787,26 @@ fn op_set_format_exception_callback<'a>(
   let old = old.map(|v| v8::Local::new(scope, v));
   Ok(old.map(|v| from_v8(scope, v.into()).unwrap()))
 }
+
+#[op(v8)]
+fn op_event_loop_has_more_work(scope: &mut v8::HandleScope) -> bool {
+  let state_rc = JsRuntime::state(scope);
+  let module_map_rc = JsRuntime::module_map(scope);
+  let state = state_rc.borrow_mut();
+  let module_map = module_map_rc.borrow();
+
+  let has_pending_refed_ops = state.pending_ops.len() > state.unrefed_ops.len();
+  let has_pending_dyn_imports = module_map.has_pending_dynamic_imports();
+  let has_pending_dyn_module_evaluation =
+    !state.pending_dyn_mod_evaluate.is_empty();
+  let has_pending_module_evaluation = state.pending_mod_evaluate.is_some();
+  let has_pending_background_tasks = scope.has_pending_background_tasks();
+  let has_tick_scheduled = state.has_tick_scheduled;
+
+  has_pending_refed_ops
+    || has_pending_dyn_imports
+    || has_pending_dyn_module_evaluation
+    || has_pending_module_evaluation
+    || has_pending_background_tasks
+    || has_tick_scheduled
+}