From c87186757e453f6bf721be4012794c756a4d8d7e Mon Sep 17 00:00:00 2001
From: flakey5 <73616808+flakey5@users.noreply.github.com>
Date: Sat, 17 Sep 2022 12:49:30 -0700
Subject: [PATCH] lib: add cause to DOMException

---
 lib/internal/per_context/domexception.js | 21 +++++++++++----
 test/parallel/test-domexception-cause.js | 33 ++++++++++++++++++++++++
 2 files changed, 49 insertions(+), 5 deletions(-)
 create mode 100644 test/parallel/test-domexception-cause.js

diff --git a/lib/internal/per_context/domexception.js b/lib/internal/per_context/domexception.js
index 917e2c00bccda9..01893dc3d81e79 100644
--- a/lib/internal/per_context/domexception.js
+++ b/lib/internal/per_context/domexception.js
@@ -49,12 +49,23 @@ const disusedNamesSet = new SafeSet()
   .add('ValidationError');
 
 class DOMException {
-  constructor(message = '', name = 'Error') {
+  constructor(message = '', options = 'Error') {
     ErrorCaptureStackTrace(this);
-    internalsMap.set(this, {
-      message: `${message}`,
-      name: `${name}`
-    });
+
+    if (options && typeof options === 'object') {
+      const { name, cause } = options;
+      internalsMap.set(this, {
+        message: `${message}`,
+        name: `${name}`
+      });
+
+      ObjectDefineProperty(this, 'cause', { __proto__: null, value: cause });
+    } else {
+      internalsMap.set(this, {
+        message: `${message}`,
+        name: `${options}`
+      });
+    }
   }
 
   get name() {
diff --git a/test/parallel/test-domexception-cause.js b/test/parallel/test-domexception-cause.js
new file mode 100644
index 00000000000000..122636fe33e6b5
--- /dev/null
+++ b/test/parallel/test-domexception-cause.js
@@ -0,0 +1,33 @@
+'use strict';
+
+require('../common');
+const { strictEqual, deepStrictEqual } = require('assert');
+
+{
+    const domException = new DOMException('no cause', 'abc');
+    strictEqual(domException.name, 'abc');
+    strictEqual('cause' in domException, false);
+    strictEqual(domException.cause, undefined);
+}
+
+{
+    const domException = new DOMException('with undefined cause', { name: 'abc', cause: undefined });
+    strictEqual(domException.name, 'abc');
+    strictEqual('cause' in domException, true);
+    strictEqual(domException.cause, undefined);
+}
+
+{
+    const domException = new DOMException('with string cause', { name: 'abc', cause: 'foo' });
+    strictEqual(domException.name, 'abc');
+    strictEqual('cause' in domException, true);
+    strictEqual(domException.cause, 'foo');
+}
+
+{
+    const object = { reason: 'foo' };
+    const domException = new DOMException('with object cause', { name: 'abc', cause: object });
+    strictEqual(domException.name, 'abc');
+    strictEqual('cause' in domException, true);
+    deepStrictEqual(domException.cause, object);
+}