feat: window.onunload (#3023)

cli/lib.rs

@@ -371,12 +371,17 @@ fn run_script(flags: DenoFlags, argv: Vec<String>) {
     js_check(worker.execute("denoMain()"));
     debug!("main_module {}", main_module);
 
+    let mut worker_ = worker.clone();
+
     worker
       .execute_mod_async(&main_module, false)
       .and_then(move |()| {
         js_check(worker.execute("window.dispatchEvent(new Event('load'))"));
-        worker.then(|result| {
+        worker.then(move |result| {
           js_check(result);
+          js_check(
+            worker_.execute("window.dispatchEvent(new Event('unload'))"),
+          );
           Ok(())
         })
       })

cli/tests/034_onload.out

@@ -5,3 +5,7 @@ got load event in onload function
 got load event in event handler (nest_imported)
 got load event in event handler (imported)
 got load event in event handler (main)
+got unload event in onunload function
+got unload event in event handler (nest_imported)
+got unload event in event handler (imported)
+got unload event in event handler (main)

cli/tests/034_onload/imported.ts

@@ -1,8 +1,11 @@
+import { assert } from "../../../js/deps/https/deno.land/std/testing/asserts.ts";
 import "./nest_imported.ts";
-window.addEventListener(
-  "load",
-  (e: Event): void => {
-    console.log(`got ${e.type} event in event handler (imported)`);
-  }
-);
+
+const handler = (e: Event): void => {
+  assert(!e.cancelable);
+  console.log(`got ${e.type} event in event handler (imported)`);
+};
+
+window.addEventListener("load", handler);
+window.addEventListener("unload", handler);
 console.log("log from imported script");

cli/tests/034_onload/main.ts

@@ -1,14 +1,23 @@
+import { assert } from "../../../js/deps/https/deno.land/std/testing/asserts.ts";
 import "./imported.ts";
 
-window.addEventListener(
-  "load",
-  (e: Event): void => {
-    console.log(`got ${e.type} event in event handler (main)`);
-  }
-);
+const eventHandler = (e: Event): void => {
+  assert(!e.cancelable);
+  console.log(`got ${e.type} event in event handler (main)`);
+};
+
+window.addEventListener("load", eventHandler);
+
+window.addEventListener("unload", eventHandler);
 
 window.onload = (e: Event): void => {
+  assert(!e.cancelable);
   console.log(`got ${e.type} event in onload function`);
 };
 
+window.onunload = (e: Event): void => {
+  assert(!e.cancelable);
+  console.log(`got ${e.type} event in onunload function`);
+};
+
 console.log("log from main");

cli/tests/034_onload/nest_imported.ts

@@ -1,7 +1,10 @@
-window.addEventListener(
-  "load",
-  (e: Event): void => {
-    console.log(`got ${e.type} event in event handler (nest_imported)`);
-  }
-);
+import { assert } from "../../../js/deps/https/deno.land/std/testing/asserts.ts";
+
+const handler = (e: Event): void => {
+  assert(!e.cancelable);
+  console.log(`got ${e.type} event in event handler (nest_imported)`);
+};
+
+window.addEventListener("load", handler);
+window.addEventListener("unload", handler);
 console.log("log from nest_imported script");

cli/tests/034_onload_imported.ts

@@ -1 +0,0 @@
-console.log("from imported script");