From 886d796e0b020c7cc02dc59f657c992aed0e54ca Mon Sep 17 00:00:00 2001
From: Joshua Kifer <joshua.kifer@gmail.com>
Date: Tue, 5 Jan 2016 11:53:01 -0800
Subject: [PATCH] Fixed setAttributes for custom components (like Polymer uses)
 with readonly properties

---
 mithril.js | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/mithril.js b/mithril.js
index 2e1153bb..c6384beb 100644
--- a/mithril.js
+++ b/mithril.js
@@ -579,7 +579,11 @@ var m = (function app(window, undefined) {
 					//- when using CSS selectors (e.g. `m("[style='']")`), style is used as a string, but it's an object in js
 					else if (attrName in node && attrName !== "list" && attrName !== "style" && attrName !== "form" && attrName !== "type" && attrName !== "width" && attrName !== "height") {
 						//#348 don't set the value if not needed otherwise cursor placement breaks in Chrome
-						if (tag !== "input" || node[attrName] !== dataAttr) node[attrName] = dataAttr;
+						try {
+							if (tag !== "input" || node[attrName] !== dataAttr) node[attrName] = dataAttr;
+						} catch (e) {
+							node.setAttribute(attrName, dataAttr);
+						}
 					}
 					else node.setAttribute(attrName, dataAttr);
 				}