docs: update gtm docs

Signed-off-by: DavidWells <>
mathisobadia · Feb 1, 2021 · ce63cdd · ce63cdd
1 parent 7dd8f9e
commit ce63cdd
Showing 1 changed file with 2 additions and 0 deletions.
diff --git a/site/main/source/plugins/google-tag-manager.md b/site/main/source/plugins/google-tag-manager.md
@@ -106,6 +106,8 @@ const analytics = Analytics({
 | `containerId` <br/>**required** - string| The Container ID uniquely identifies the GTM Container. |
 | `dataLayerName` <br/>_optional_ - string| The optional name for dataLayer-object. Defaults to dataLayer. |
 | `customScriptSrc` <br/>_optional_ - string| Load Google Tag Manager script from a custom source |
+| `preview` <br/>_optional_ - string| The preview-mode environment |
+| `auth` <br/>_optional_ - string| The preview-mode authentication credentials |
 
 ## Additional examples