From 2b63bcde91ec233821b711c02282e0080c7e75d9 Mon Sep 17 00:00:00 2001
From: Kuitos <kuitos.lau@gmail.com>
Date: Mon, 14 Dec 2020 22:52:12 +0800
Subject: [PATCH] =?UTF-8?q?=F0=9F=90=9B=20sync=20getOwnPropertyDescriptor?=
 =?UTF-8?q?=20trap=20logic=20of=20legacy=20sandbox=20from=20proxy=20sandbo?=
 =?UTF-8?q?x=20(#1156)?=
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---
 src/sandbox/legacy/sandbox.ts | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/src/sandbox/legacy/sandbox.ts b/src/sandbox/legacy/sandbox.ts
index 0440f0c..8f5a586 100644
--- a/src/sandbox/legacy/sandbox.ts
+++ b/src/sandbox/legacy/sandbox.ts
@@ -124,7 +124,12 @@ export default class SingularProxySandbox implements SandBox {
       },
 
       getOwnPropertyDescriptor(_: Window, p: PropertyKey): PropertyDescriptor | undefined {
-        return Object.getOwnPropertyDescriptor(rawWindow, p);
+        const descriptor = Object.getOwnPropertyDescriptor(rawWindow, p);
+        // A property cannot be reported as non-configurable, if it does not exists as an own property of the target object
+        if (descriptor && !descriptor.configurable) {
+          descriptor.configurable = true;
+        }
+        return descriptor;
       },
     });