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Also call posthog.identify with segment #10316

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Jan 9, 2025
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Also call posthog.identify with segment #10316

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Also call posthog.identify with segment
timgl Jan 9, 2025
08c1ae0
Update segment.md
timgl Jan 9, 2025
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15 changes: 11 additions & 4 deletions contents/docs/libraries/segment.md
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Expand Up @@ -39,12 +39,17 @@ The simple Segment destination only supports tracking of pageviews, custom event
analytics.load("<your-segment-key>");

analytics.ready(() => {
window.posthog.init("<your-posthog-key>", {
window.posthog.init("<ph_project_api_key>", {
api_host: '<ph_client_api_host>', // Use eu.i.posthog.com for EU instances
segment: window.analytics, // Pass window.analytics here - NOTE: `window.` is important
capture_pageview: false, // You want this false if you are going to use segment's `analytics.page()` for pageviews
// When the posthog library has loaded, call `analytics.page()` explicitly.
loaded: () => window.analytics.page(),

loaded: (posthog) => {
// When the posthog library has loaded, call `analytics.page()` explicitly.
window.analytics.page()
// If you're calling analytics.identify, you still need to call posthog.identify too
// posthog.identify('[user unique id]')
}
});
})
```
Expand All @@ -70,7 +75,7 @@ Similarly, the `analytics.page()` function sends `$pageview` events and the `ana

### Identifying users

To add identify users and add person properties, you can use Segment's `identify` function:
To add identify users and add person properties, you can use Segment's `identify` function.

```js
analytics.identify('userId123', {
Expand All @@ -83,6 +88,8 @@ This works similarly to PostHog's [`identify` function](/docs/product-analytics/
1. It identifies anonymous users with a distinct ID, creating a person in PostHog.
2. It sets the person properties.

> If you're also using the PostHog SDK or snippet for the other PostHog functionality, you also need to call `posthog.identify`

### Aliasing users

You can also assign multiple distinct IDs to the same user using Segment's `alias` function (the `previousId` argument is optional):
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