From 57a94d6de0219972373f1a2692e500a90a9116cb Mon Sep 17 00:00:00 2001
From: Patrick Steele-Idem <pnidem@gmail.com>
Date: Thu, 20 Apr 2017 13:53:45 -0600
Subject: [PATCH] [compiler] Added more control over how attributes are
 targeted to props

---
 compiler/ast/CustomTag.js | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/compiler/ast/CustomTag.js b/compiler/ast/CustomTag.js
index ba21dacb7..339f9d026 100644
--- a/compiler/ast/CustomTag.js
+++ b/compiler/ast/CustomTag.js
@@ -259,6 +259,17 @@ class CustomTag extends HtmlElement {
                 // to a property name.
                 if (attrDef.targetProperty) {
                     propName = attrDef.targetProperty;
+                    if (Array.isArray(propName)) {
+                        let propChain = propName;
+                        if (propChain.length === 1) {
+                            propName = propChain[0];
+                        } else if (propChain.length === 2) {
+                            parentPropName = propChain[0];
+                            propName = propChain[1];
+                        } else {
+                            throw new Error('Invalid "target-property". Expected array with two elements in the following form: ["PARENT_PROPERTY_NAME", "CHILD_PROPERTY_NAME"]');
+                        }
+                    }
                 } else if (attrDef.preserveName === true) {
                     propName = attrName;
                 } else {