From 74d4b7c30e45fb5870e1fa49d3925bc56a01ef94 Mon Sep 17 00:00:00 2001
From: Zach Silveira <zackify@gmail.com>
Date: Tue, 10 Jan 2017 09:58:29 -0500
Subject: [PATCH] Headers callback

---
 src/utilities/normalize.js | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/utilities/normalize.js b/src/utilities/normalize.js
index 18e198b..b1e8d6a 100644
--- a/src/utilities/normalize.js
+++ b/src/utilities/normalize.js
@@ -35,6 +35,10 @@ const buildObjectFromTag = (strings, vars, partial) => {
       if (partial.url && key === 'url' && typeof vars[index] === 'function') {
         return [key, vars[index](partial.url)]
       }
+
+      if (key === 'headers' && typeof vars[index] === 'function') {
+        return [key, vars[index](partial)]
+      }
       return [key, vars[index]]
     })
     // Convert to object