${documentReferrer} is empty when document.referrer is "https://www.google.com/"

0
votes

Looking through the AMP documentation (https://github.com/ampproject/amphtml/blob/master/spec/amp-var-substitutions.md#document-referrer) is appears that the documentReferrer variable should reflect the JS document.referrer.

While documentReferrer appears to report the correct value for other domains (like: www.twitter.com, t.co, linkedin.com, etc.) when the page's document.referrer value is "https://www.google.com/" documentReferrer is empty. I couldn't find any documentation indicating that the www.google.com domain carried any additional caveats.

1
amp-html
What's your expected outcome? - noogui
Based on the documentation I would expect the AMP article's documentReferrer to be "https://www.google.com/" when that was the referring URL. - Matt Rohland

1 Answers

0
votes

The AMP documentation is accurate. There is no exception made for "https://www.google.com/".

It is worth mentioning that some AMP tags (like <analytics-tag>) allow you to define custom variables for internal use within the tag. These variables can take precedence over global variables (like documentReferrer) within that tag's scope.

For more details on one very specific scenario where that can occur see: https://github.com/ampproject/amphtml/issues/10374