From 10faafd13853da8549a1bd9625208e5f026eb203 Mon Sep 17 00:00:00 2001
From: Jonathan Lonowski <coiscir@gmail.com>
Date: Sun, 3 Apr 2016 20:35:55 -0500
Subject: [PATCH 1/4] Avoid replacing existing `toJSON` definitions.

---
 index.js | 1 +
 1 file changed, 1 insertion(+)

diff --git a/index.js b/index.js
index d92103f..8f54650 100644
--- a/index.js
+++ b/index.js
@@ -1,3 +1,4 @@
+if (!('toJSON' in Error.prototype))
 Object.defineProperty(Error.prototype, 'toJSON', {
     value: function () {
         var alt = {};

From f78f10f3a8548c2e085aa6c9baab9151ddc26ae0 Mon Sep 17 00:00:00 2001
From: Jonathan Lonowski <coiscir@gmail.com>
Date: Mon, 4 Apr 2016 21:43:41 -0500
Subject: [PATCH 2/4] Revise to exit module if `toJSON` is already defined.

AVVS/error-tojson#3
---
 index.js | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/index.js b/index.js
index 8f54650..b4af5b7 100644
--- a/index.js
+++ b/index.js
@@ -1,4 +1,7 @@
-if (!('toJSON' in Error.prototype))
+if ('toJSON' in Error.prototype) {
+  return;
+}
+
 Object.defineProperty(Error.prototype, 'toJSON', {
     value: function () {
         var alt = {};

From 5368a1dff30ddd798ff652156854ef402ba555da Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Jes=C3=BAs=20Legan=C3=A9s-Combarro=20=27piranna?=
 <piranna@gmail.com>
Date: Fri, 6 Apr 2018 11:17:24 +0200
Subject: [PATCH 3/4] Use only enumerable properties

---
 index.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/index.js b/index.js
index a029ce9..6a880d5 100644
--- a/index.js
+++ b/index.js
@@ -6,7 +6,7 @@ Object.defineProperty(Error.prototype, 'toJSON', {
     value: function () {
         var alt = {};
 
-        Object.getOwnPropertyNames(this).forEach(function (key) {
+        Object.keys(this).forEach(function (key) {
             alt[key] = this[key];
         }, this);
 

From 1905c804eb3013c2fa75281a55c1803e982adf2b Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Jes=C3=BAs=20Legan=C3=A9s-Combarro=20=27piranna?=
 <piranna@gmail.com>
Date: Fri, 15 Jun 2018 09:47:35 +0200
Subject: [PATCH 4/4] Use `fclone` to do serialization

---
 .gitignore   |  1 +
 index.js     | 11 ++++-------
 package.json |  5 ++++-
 3 files changed, 9 insertions(+), 8 deletions(-)
 create mode 100644 .gitignore

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..c2658d7
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+node_modules/
diff --git a/index.js b/index.js
index 6a880d5..60d9bc9 100644
--- a/index.js
+++ b/index.js
@@ -1,16 +1,13 @@
+const fclone = require('fclone');
+
+
 if ('toJSON' in Error.prototype) {
   return;
 }
 
 Object.defineProperty(Error.prototype, 'toJSON', {
     value: function () {
-        var alt = {};
-
-        Object.keys(this).forEach(function (key) {
-            alt[key] = this[key];
-        }, this);
-
-        return alt;
+        return fclone(this);
     },
     configurable: true,
     writable: true
diff --git a/package.json b/package.json
index e23853e..a3cf94c 100644
--- a/package.json
+++ b/package.json
@@ -20,5 +20,8 @@
   "bugs": {
     "url": "https://github.com/AVVS/error-tojson/issues"
   },
-  "homepage": "https://github.com/AVVS/error-tojson"
+  "homepage": "https://github.com/AVVS/error-tojson",
+  "dependencies": {
+    "fclone": "^1.0.11"
+  }
 }