Fix block param evaluation under older IE

1 files changed, 10 insertions, 0 deletions

diff --git a/lib/handlebars/utils.js b/lib/handlebars/utils.js
index 8cea50d..fc2b846 100644
--- a/lib/handlebars/utils.js
+++ b/lib/handlebars/utils.js
@@ -48,6 +48,16 @@ export var isArray = Array.isArray || function(value) {
   return (value && typeof value === 'object') ? toString.call(value) === '[object Array]' : false;
 };
 
+// Older IE versions do not directly support indexOf so we must implement our own, sadly.
+export function indexOf(array, value) {
+  for (var i = 0, len = array.length; i < len; i++) {
+    if (array[i] === value) {
+      return i;
+    }
+  }
+  return -1;
+}
+
 
 export function escapeExpression(string) {
   // don't escape SafeStrings, since they're already safe