events: add null check for the signal of EventTarget

This will improve the Web compatibility.
Passing null as the signal should throw an error.
WPT says "Passing null as the signal should throw".
Please see https://github.com/web-platform-tests/wpt/blob/master/dom/events/AddEventListenerOptions-signal.any.js

PR-URL: #43153
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Antoine du Hamel <duhamelantoine1995@gmail.com>
Reviewed-By: Tobias Nießen <tniessen@tnie.de>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>

lib/internal/event_target.js

@@ -34,7 +34,7 @@ const {
     ERR_INVALID_THIS,
   }
 } = require('internal/errors');
-const { validateObject, validateString, validateInternalField } = require('internal/validators');
+const { validateAbortSignal, validateObject, validateString, validateInternalField } = require('internal/validators');
 
 const {
   customInspectSymbol,
@@ -575,6 +575,8 @@ class EventTarget {
     }
     type = String(type);
 
+    validateAbortSignal(signal, 'options.signal');
+
     if (signal) {
       if (signal.aborted) {
         return;

test/parallel/test-whatwg-events-add-event-listener-options-signal.js

@@ -4,6 +4,7 @@ require('../common');
 
 const {
   strictEqual,
+  throws,
 } = require('assert');
 
 // Manually ported from: wpt@dom/events/AddEventListenerOptions-signal.any.js
@@ -157,3 +158,11 @@ const {
   }, { once: true });
   et.dispatchEvent(new Event('foo'));
 }
+{
+  const et = new EventTarget();
+  [1, 1n, {}, [], null, true, 'hi', Symbol(), () => {}].forEach((signal) => {
+    throws(() => et.addEventListener('foo', () => {}, { signal }), {
+      name: 'TypeError',
+    });
+  });
+}

test/wpt/status/dom/events.json

@@ -11,7 +11,6 @@
   "AddEventListenerOptions-signal.any.js": {
     "fail": {
       "expected": [
-        "Passing null as the signal should throw",
         "Passing null as the signal should throw (listener is also null)"
       ]
     }