From fd56fa89f36016a816450cd0e8df5853c66d170c Mon Sep 17 00:00:00 2001
From: Yoshiya Hinosawa <stibium121@gmail.com>
Date: Tue, 12 Jan 2021 19:32:58 +0900
Subject: [PATCH] fix(cli): dispatch unload on exit (#9088)

---
 cli/tests/078_unload_on_exit.ts     | 4 ++++
 cli/tests/078_unload_on_exit.ts.out | 1 +
 cli/tests/integration_tests.rs      | 5 +++++
 runtime/js/30_os.js                 | 3 +++
 4 files changed, 13 insertions(+)
 create mode 100644 cli/tests/078_unload_on_exit.ts
 create mode 100644 cli/tests/078_unload_on_exit.ts.out

diff --git a/cli/tests/078_unload_on_exit.ts b/cli/tests/078_unload_on_exit.ts
new file mode 100644
index 0000000000..e8288ef31a
--- /dev/null
+++ b/cli/tests/078_unload_on_exit.ts
@@ -0,0 +1,4 @@
+window.onunload = () => {
+  console.log("onunload is called");
+};
+Deno.exit(0);
diff --git a/cli/tests/078_unload_on_exit.ts.out b/cli/tests/078_unload_on_exit.ts.out
new file mode 100644
index 0000000000..e213f9632d
--- /dev/null
+++ b/cli/tests/078_unload_on_exit.ts.out
@@ -0,0 +1 @@
+[WILDCARD]onunload is called
diff --git a/cli/tests/integration_tests.rs b/cli/tests/integration_tests.rs
index feb3f7f048..40da5c627c 100644
--- a/cli/tests/integration_tests.rs
+++ b/cli/tests/integration_tests.rs
@@ -2646,6 +2646,11 @@ itest!(_077_fetch_empty {
   exit_code: 1,
 });
 
+itest!(_078_unload_on_exit {
+  args: "run 078_unload_on_exit.ts",
+  output: "078_unload_on_exit.ts.out",
+});
+
 itest!(js_import_detect {
   args: "run --quiet --reload js_import_detect.ts",
   output: "js_import_detect.ts.out",
diff --git a/runtime/js/30_os.js b/runtime/js/30_os.js
index 74af821243..1d700b5616 100644
--- a/runtime/js/30_os.js
+++ b/runtime/js/30_os.js
@@ -24,6 +24,9 @@
   }
 
   function exit(code = 0) {
+    // Invokes the `unload` hooks before exiting
+    // ref: https://github.com/denoland/deno/issues/3603
+    window.dispatchEvent(new Event("unload"));
     core.jsonOpSync("op_exit", { code });
     throw new Error("Code not reachable");
   }