- Tracking events and sending profile updates now occurs via HTTP POST by default, with data in the request body, rather than GET with data on the URL.
- Events now include the
$insert_id
property for deduplication support. - Malformed URI params in attribution fields like
utm_source
no longer lead to exceptions.
To force tracking via GET instead of POST, use the api_method
config option:
mixpanel.init(TOKEN, {api_method: 'GET'});