From dbd2632da97fd08fbd2c7e0ad0ec8e2bd08918fe Mon Sep 17 00:00:00 2001
From: Nadia Makarevich <nmakarevich@atlassian.com>
Date: Tue, 3 May 2016 11:18:29 +1000
Subject: [PATCH 1/2] fix #60 - writable for polyfilled properties

---
 src/index.js | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/index.js b/src/index.js
index b8e4d24..d755543 100644
--- a/src/index.js
+++ b/src/index.js
@@ -749,6 +749,8 @@ if (!('attachShadow' in document.createElement('div'))) {
 
     // All properties should be configurable.
     memberProperty.configurable = true;
+    // Applying to the data properties only since we can't have writable accessor properties
+    !(memberProperty.hasOwnProperty('get') || memberProperty.hasOwnProperty('set')) && (memberProperty.writable = true);
 
     // Polyfill as much as we can and work around WebKit in other areas.
     if (canPatchNativeAccessors || polyfillAtRuntime.indexOf(memberName) === -1) {

From be4903e0e9aa0da2cdda645d98d049622f3701fd Mon Sep 17 00:00:00 2001
From: Nadia Makarevich <nmakarevich@atlassian.com>
Date: Tue, 3 May 2016 15:25:06 +1000
Subject: [PATCH 2/2] fix #60 - add test

---
 src/index.js                 | 4 +++-
 test/unit/shadow/polyfill.js | 7 +++++++
 2 files changed, 10 insertions(+), 1 deletion(-)

diff --git a/src/index.js b/src/index.js
index d755543..7cf0ff9 100644
--- a/src/index.js
+++ b/src/index.js
@@ -750,7 +750,9 @@ if (!('attachShadow' in document.createElement('div'))) {
     // All properties should be configurable.
     memberProperty.configurable = true;
     // Applying to the data properties only since we can't have writable accessor properties
-    !(memberProperty.hasOwnProperty('get') || memberProperty.hasOwnProperty('set')) && (memberProperty.writable = true);
+    if (memberProperty.hasOwnProperty('value')) {
+      memberProperty.writable = true
+    }
 
     // Polyfill as much as we can and work around WebKit in other areas.
     if (canPatchNativeAccessors || polyfillAtRuntime.indexOf(memberName) === -1) {
diff --git a/test/unit/shadow/polyfill.js b/test/unit/shadow/polyfill.js
index e726ed9..6ba3cc5 100644
--- a/test/unit/shadow/polyfill.js
+++ b/test/unit/shadow/polyfill.js
@@ -53,6 +53,13 @@ describe('shadow/polyfill', function () {
     });
   }
 
+  it('polyfilled properties with value should be writable', function() {
+    let elem = create('div');
+    
+    expect(elem.removeEventListener).not.to.equal("");
+    elem.removeEventListener = "";
+    expect(elem.removeEventListener).to.equal("");
+  });
 
   describe('api', function () {
     let host, root;