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Amplitude

Sumatra can send events to Amplitude analytics when a visitor is assigned to a targeted experience or experiment. This allows you to add the Sumatra experience as additional context when analyzing traffic and conversions in Amplitude.

Impressions​

To asynchronously send a Variants Seen event on every page view, add the following code directly on your page, below the Sumatra snippet, or via Google Tag Manager.

<script>
window.sumatra.ready((sumatra) => {
    sumatra.optimizer.subscribe((assignedVariants) => {
        amplitude.track('Variants Seen', { assignedVariants });
    })
})
</script>

The resulting payload will look something like:

{
    "assignedVariants": [
        "signups-hero-default",
        "signups-body-light"
    ]
}

User Actions​

To add context to an event that a user initiates synchronously, you can access the sumatra.optimizer.assignedVariants variable directly.

Button click example:

<button id="clickme" onclick="trackClick(this.id)">Click Me</button>

<script>
function trackClick(id) {
    amplitude.track('Button Clicked', {
        button: id,
        assignedVariants: window.sumatra.optimizer.assignedVariants
    });
}
</script>