From efbd414a4d5af7b5144f1d08522e46cc043b627d Mon Sep 17 00:00:00 2001
From: Robert Messerle <rmesserle@google.com>
Date: Thu, 19 Feb 2015 14:18:54 -0800
Subject: [PATCH] fix(input): fix hidden textarea height issue

Closes #1356.
---
 src/components/input/input.js | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/src/components/input/input.js b/src/components/input/input.js
index 4bbb30b553b..ec340e2e46c 100644
--- a/src/components/input/input.js
+++ b/src/components/input/input.js
@@ -241,10 +241,14 @@ function inputTextareaDirective($mdUtil, $window) {
 
       function growTextarea() {
         node.style.height = "auto";
-        var line = node.scrollHeight - node.offsetHeight;
         node.scrollTop = 0;
-        var height = node.offsetHeight + (line > 0 ? line : 0);
-        node.style.height = height + 'px';
+        var height = getHeight();
+        if (height) node.style.height = height + 'px';
+      }
+
+      function getHeight () {
+        var line = node.scrollHeight - node.offsetHeight;
+        return node.offsetHeight + (line > 0 ? line : 0);
       }
 
       function onScroll(e) {