From 978bf851486e16f4bce15249748cc6278be50d37 Mon Sep 17 00:00:00 2001
From: scott-thrillist <sleonard@thrillist.com>
Date: Wed, 19 Jul 2017 13:06:36 -0400
Subject: [PATCH] deep cloning options reference so we're not adding onto
 original config

---
 src/index.js | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/index.js b/src/index.js
index 1730f2b9..5778aeca 100644
--- a/src/index.js
+++ b/src/index.js
@@ -28,8 +28,11 @@ class UglifyJsPlugin {
   constructor(options) {
     if (typeof options !== 'object' || Array.isArray(options)) {
       this.options = {};
+    } else if (typeof options === 'object') {
+      // Deep clone to keep original object in tact
+      this.options = JSON.parse(JSON.stringify(options));
     } else {
-      this.options = options || {};
+      this.options = {};
     }
 
     this.options.test = this.options.test || /\.js($|\?)/i;