1 files changed, 13 insertions, 0 deletions
diff --git a/lib/handlebars/helpers/helper-missing.js b/lib/handlebars/helpers/helper-missing.js
new file mode 100644
index 0000000..ec32e82
--- /dev/null
+++ b/lib/handlebars/helpers/helper-missing.js
@@ -0,0 +1,13 @@
+import Exception from '../exception';
+
+export default function(instance) {
+  instance.registerHelper('helperMissing', function(/* [args, ]options */) {
+    if (arguments.length === 1) {
+      // A missing field in a {{foo}} construct.
+      return undefined;
+    } else {
+      // Someone is actually trying to call something, blow up.
+      throw new Exception('Missing helper: "' + arguments[arguments.length - 1].name + '"');
+    }
+  });
+}