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Managing multiple trackers

Documentation for latest release

The documentation listed here is for Version 2 of the JavaScript Tracker. Version 3 is now available and upgrading is recommended.

- Documentation for Version 3

- v2 to v3 Migration Guide

You have more than one tracker instance running on the same page at once. This may be useful if you want to log events to different collectors. By default, any Snowplow method you call will be executed by every tracker you have created so far. You can override this behaviour and specify which trackers will execute a Snowplow method. To do this, change the method name by adding a colon followed by a list of tracker names separated by semicolons.

snowplow("newTracker", "sp1", "{{FIRST_COLLECTOR_URL}}", {
appId: "my-app",
platform: "mob"

snowplow("newTracker", "sp2", "{{SECOND_COLLECTOR_URL}}", {
appId: "my-app",
platform: "mob"

// Both trackers will use this custom title
snowplow('setCustomUrl', '');

// Both trackers will fire a structured event
snowplow('trackStructEvent', 'Mixes', 'Play', 'MrC/fabric-0503-mix', '', '0.0');

// Only the first tracker will fire this structured event
snowplow('trackStructEvent:sp1', 'Mixes', 'Play', 'MrC/fabric-0503-mix', '', '0.0');

// Only the second tracker will fire this self-describing event
product_id: 'ASO01043',
category: 'Dresses',
brand: 'ACME',
returning: true,
price: 49.95,
sizes: ['xs', 's', 'l', 'xl', 'xxl'],
available_since$dt: new Date(2013,3,7)

// Both trackers will fire a page view event