omit gtm_preview if not in preview mode

fixes alinemorelli#48
RobertHeim · Dec 5, 2019 · 6ea898e · 6ea898e
1 parent 52f2328
commit 6ea898e
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/src/Snippets.js b/src/Snippets.js
@@ -5,7 +5,7 @@ import warn from './utils/warn'
 const Snippets = {
   tags: function ({ id, events, dataLayer, dataLayerName, preview, auth }) {
     const gtm_auth = `&gtm_auth=${auth}`
-    const gtm_preview = `&gtm_preview=${preview}`
+    const gtm_preview = !preview ? '' : `&gtm_preview=${preview}`
 
     if (!id) warn('GTM Id is required')