@deriv-com/analytics

A modern, tree-shakeable analytics library for tracking user events with RudderStack and PostHog. Designed for optimal performance with advanced caching, batching, and offline support.

Features

• 📊 Multi-Provider Support: RudderStack for event tracking and PostHog for analytics & session recording
• 🎄 Tree-Shakeable: Only bundle what you use - each provider can be imported independently
• 📡 Offline-First: Automatic event caching when offline with replay on reconnection
• ⚡ Performance Optimized: Batching, deduplication, and SendBeacon API for fast tracking
• 🔄 Backward Compatible: Supports older React, Node.js, and other legacy package versions
• 💾 Advanced Caching: localStorage and in-memory caching for robust event delivery
• 🎥 Session Recording: Built-in PostHog session recording with customizable settings

Note: GrowthBook support is deprecated and will be removed in a future major version. For A/B testing and feature flags, we recommend using PostHog's built-in feature flag capabilities.

Table of Contents

• Installation
  • NPM/Yarn
  • Browser (CDN)
• Quick Start
• Framework Integration
  • React
  • Next.js
  • Vue.js
  • Vanilla JavaScript
• Configuration
  • RudderStack
  • PostHog
• Core API
  • Initialization
  • Event Tracking
  • User Identification
  • Page Views
  • User Attributes
• Caching & Offline Support
• Debug Mode
• Advanced Usage
• API Reference
• Performance
• Troubleshooting
• Migration Guide

Installation

NPM/Yarn

# Using npm
npm install @deriv-com/analytics

# Using yarn
yarn add @deriv-com/analytics

# Using pnpm
pnpm add @deriv-com/analytics

Core dependencies (@rudderstack/analytics-js, js-cookie, and posthog-js) are installed automatically.

Browser (CDN)

Use directly in browsers without a build tool:

<!-- Load from jsdelivr CDN -->
<script src="https://cdn.jsdelivr.net/npm/@deriv-com/analytics@latest/dist/browser/analytics.bundle.global.js"></script>

<script>
    const { Analytics } = window.DerivAnalytics

    Analytics.initialise({
        rudderstackKey: 'YOUR_RUDDERSTACK_KEY',
        posthogOptions: {
            apiKey: 'YOUR_POSTHOG_KEY',
            config: {
                autocapture: true,
            },
        },
    }).then(() => {
        Analytics.trackEvent('page_view', { page: 'home' })
    })
</script>

Bundle Size: ~380 KB minified / ~125 KB gzipped (includes RudderStack + PostHog + all dependencies)

Quick Start

Basic Usage (RudderStack Only)

import { Analytics } from '@deriv-com/analytics'

// Initialize with RudderStack
await Analytics.initialise({
    rudderstackKey: 'YOUR_RUDDERSTACK_KEY',
})

// Track events
Analytics.trackEvent('ce_virtual_signup_form', {
    action: 'signup_done',
    signup_provider: 'email',
})

// Track page views
Analytics.pageView('/dashboard', 'Deriv App')

// Identify users
Analytics.identifyEvent('CR123456')

Using Both RudderStack and PostHog

import { Analytics } from '@deriv-com/analytics'

await Analytics.initialise({
    // RudderStack for event tracking (required)
    rudderstackKey: 'YOUR_RUDDERSTACK_KEY',

    // PostHog for analytics and session recording (optional)
    posthogOptions: {
        apiKey: 'phc_YOUR_POSTHOG_KEY',
        config: {
            session_recording: {
                recordCrossOriginIframes: true,
                minimumDurationMilliseconds: 30000,
            },
            autocapture: true,
        },
    },
})

// Events are automatically sent to both providers
Analytics.trackEvent('ce_login_form', {
    action: 'login_cta',
    login_provider: 'google',
})

// User identification syncs with both providers
// When using PostHog, pass email via provider-specific traits (see User Identification section)
Analytics.identifyEvent('CR123456', {
    rudderstack: { language: 'en', country_of_residence: 'US' },
    posthog: { email: '[email protected]', language: 'en', country_of_residence: 'US' },
})

Framework Integration

React Integration

The recommended pattern is a single useAnalytics hook that handles initialization and exposes all tracking methods:

// hooks/useAnalytics.ts
import { useEffect } from 'react'
import { Analytics } from '@deriv-com/analytics'

let isInitialized = false

export function useAnalytics() {
    useEffect(() => {
        if (isInitialized) return
        isInitialized = true

        const rudderstackKey = process.env.REACT_APP_RUDDERSTACK_KEY // ← replace with your env var
        const posthogKey = process.env.REACT_APP_POSTHOG_KEY // ← replace with your env var

        if (!rudderstackKey && !posthogKey) return

        Analytics.initialise({
            ...(rudderstackKey && { rudderstackKey }),
            ...(posthogKey && {
                posthogOptions: {
                    apiKey: posthogKey,
                    api_host: process.env.REACT_APP_POSTHOG_HOST,
                },
            }),
            debug: process.env.NODE_ENV === 'development',
        })
    }, [])

    return {
        trackEvent: Analytics.trackEvent,
        identifyEvent: Analytics.identifyEvent,
        pageView: Analytics.pageView,
        loadEvent: Analytics.loadEvent,
        setAttributes: Analytics.setAttributes,
        reset: Analytics.reset,
    }
}

Call the hook once at the top of your app:

// App.tsx
import { useAnalytics } from './hooks/useAnalytics'

function App() {
    const { trackEvent } = useAnalytics()

    return <button onClick={() => trackEvent('ce_signup_button', { action: 'click' })}>Sign Up</button>
}

Next.js Integration

App Router (Next.js 13+)

Use the same useAnalytics hook (with NEXT_PUBLIC_ env var prefix) inside a dedicated client provider:

// hooks/useAnalytics.ts
'use client'

import { useEffect } from 'react'
import { Analytics } from '@deriv-com/analytics'

let isInitialized = false

export function useAnalytics() {
    useEffect(() => {
        if (isInitialized) return
        isInitialized = true

        const rudderstackKey = process.env.NEXT_PUBLIC_RUDDERSTACK_KEY // ← replace with your env var
        const posthogKey = process.env.NEXT_PUBLIC_POSTHOG_KEY // ← replace with your env var

        if (!rudderstackKey && !posthogKey) return

        Analytics.initialise({
            ...(rudderstackKey && { rudderstackKey }),
            ...(posthogKey && {
                posthogOptions: {
                    apiKey: posthogKey,
                    api_host: process.env.NEXT_PUBLIC_POSTHOG_HOST,
                },
            }),
            debug: process.env.NODE_ENV === 'development',
        })
    }, [])

    return {
        trackEvent: Analytics.trackEvent,
        identifyEvent: Analytics.identifyEvent,
        pageView: Analytics.pageView,
        loadEvent: Analytics.loadEvent,
        setAttributes: Analytics.setAttributes,
        reset: Analytics.reset,
    }
}

// app/analytics-provider.tsx
'use client'

import { useAnalytics } from '@/hooks/useAnalytics'

export function AnalyticsProvider({ children }: { children: React.ReactNode }) {
    useAnalytics()
    return <>{children}</>
}

// app/layout.tsx
import { AnalyticsProvider } from './analytics-provider'

export default function RootLayout({ children }: { children: React.ReactNode }) {
    return (
        <html>
            <body>
                <AnalyticsProvider>{children}</AnalyticsProvider>
            </body>
        </html>
    )
}

Pages Router (Next.js 12 and below)

// pages/_app.tsx
import { useAnalytics } from '../hooks/useAnalytics'
import type { AppProps } from 'next/app'

export default function App({ Component, pageProps }: AppProps) {
    useAnalytics()
    return <Component {...pageProps} />
}

Vue.js Integration

// main.ts or main.js
import { createApp } from 'vue'
import { Analytics } from '@deriv-com/analytics'
import App from './App.vue'

// Initialize analytics
Analytics.initialise({
    rudderstackKey: import.meta.env.VITE_RUDDERSTACK_KEY,
    posthogOptions: {
        apiKey: import.meta.env.VITE_POSTHOG_KEY,
    },
})

// Make Analytics available globally
const app = createApp(App)
app.config.globalProperties.$analytics = Analytics
app.mount('#app')

// Usage in components
export default {
    methods: {
        handleClick() {
            this.$analytics.trackEvent('button_clicked', { button_name: 'submit' })
        },
    },
}

Vanilla JavaScript

<!doctype html>
<html>
    <head>
        <script src="https://cdn.jsdelivr.net/npm/@deriv-com/analytics@latest/dist/browser/analytics.bundle.global.js"></script>
    </head>
    <body>
        <button id="signup-btn">Sign Up</button>

        <script>
            const { Analytics } = window.DerivAnalytics

            // Initialize
            Analytics.initialise({
                rudderstackKey: 'YOUR_KEY',
                posthogOptions: {
                    apiKey: 'YOUR_POSTHOG_KEY',
                },
            })

            // Track button clicks
            document.getElementById('signup-btn').addEventListener('click', () => {
                Analytics.trackEvent('ce_signup_button', {
                    action: 'click',
                    location: 'header',
                })
            })
        </script>
    </body>
</html>

Configuration

RudderStack Configuration

RudderStack is used for event tracking and includes performance optimizations:

await Analytics.initialise({
    rudderstackKey: 'YOUR_RUDDERSTACK_KEY',
})

Built-in Performance Features:

• Event Batching: Flushes after 10 events or 10 seconds
• SendBeacon API: Uses navigator.sendBeacon for better performance on page unload
• Automatic Retry: Failed requests are automatically retried
• Cookie Management: Automatic anonymous ID generation and persistence (6-month cookie lifetime)
• Offline Support: Events are cached when offline and replayed when connection is restored

PostHog Configuration

PostHog provides powerful analytics, session recording, and feature flags:

await Analytics.initialise({
    rudderstackKey: 'YOUR_RUDDERSTACK_KEY',
    posthogOptions: {
        // Required: API key
        apiKey: 'phc_YOUR_KEY',

        // Optional: Override the PostHog API host.
        // If omitted, the host is auto-selected at init time based on window.location.hostname:
        //   *.deriv.me  → https://ph.deriv.me
        //   *.deriv.be  → https://ph.deriv.be
        //   *.deriv.ae  → https://ph.deriv.ae
        //   all others  → https://ph.deriv.com (default, also used in SSR/non-browser environments)
        // Set this explicitly if you need to override the resolved host (e.g. in tests or custom deployments).
        api_host: 'https://ph.deriv.com',

        // Optional: PostHog configuration
        config: {
            // ui_host controls where the PostHog UI links point (e.g. session replay links).
            // This is separate from api_host and should remain pointed at the PostHog cloud UI.
            ui_host: 'https://us.posthog.com',

            // Session recording
            session_recording: {
                recordCrossOriginIframes: true,
                maskAllInputs: false,
                minimumDurationMilliseconds: 30000, // Only save sessions longer than 30 seconds
            },

            // Feature capture
            autocapture: true, // Automatically capture clicks, form submissions, etc.
            capture_pageview: true, // Automatically capture page views
            capture_pageleave: true, // Capture when users leave pages

            // Console log recording (useful for debugging)
            enable_recording_console_log: true,

            // Disable features if needed
            disable_session_recording: false,
            disable_surveys: false,

            // Custom event filtering
            before_send: event => {
                // Custom logic to filter or modify events
                return event
            },
        },
    },
})

Stale Cookie Cleanup

On every PostHog initialization, the library automatically removes leftover ph_*_posthog cookies from previous or rotated API keys. This prevents stale cookies from accumulating in users' browsers when the PostHog project key changes.

Domain Allowlisting

PostHog events are only sent from the following domains (hardcoded internally):

• deriv.com, deriv.be, deriv.me, deriv.team, deriv.ae
• localhost and 127.0.0.1 are always allowed

Events from any other domain are silently blocked. This list is not user-configurable.

Session Recording Customization

posthogOptions: {
    apiKey: 'phc_YOUR_KEY',
    config: {
        session_recording: {
            // Record content from iframes
            recordCrossOriginIframes: true,

            // Mask sensitive input fields
            maskAllInputs: true,
            maskInputOptions: {
                password: true,
                email: true,
            },

            // Only save sessions longer than 1 minute
            minimumDurationMilliseconds: 60000,

            // Sampling (record only 50% of sessions)
            sessionRecordingSampleRate: 0.5,
        },
    },
}

Core API

Initialization

Initialize the analytics instance before tracking events:

await Analytics.initialise({
    rudderstackKey: 'YOUR_RUDDERSTACK_KEY',
    posthogOptions: {
        apiKey: 'phc_YOUR_POSTHOG_KEY',
        config: {
            autocapture: true,
        },
    },
    debug: false, // Enable to log all analytics calls to the console
})

Event Tracking

Track custom events with any payload — there are no enforced property types. Send exactly what your event needs:

Analytics.trackEvent('ce_login_form', {
    action: 'login_cta',
    login_provider: 'email',
    form_name: 'main_login',
})

Analytics.trackEvent('ce_signup_form', {
    action: 'signup_done',
    signup_provider: 'google',
    cta_information: {
        cta_name: 'get_started',
        section_name: 'hero',
    },
})

User Identification

Identify users and sync traits across analytics providers:

Simple Identification

// Identify user with ID only
Analytics.identifyEvent('CR123456')

Identification with Custom Traits

// Send same traits to both RudderStack and PostHog (no PostHog-specific fields)
Analytics.identifyEvent('CR123456', {
    language: 'en',
    country_of_residence: 'US',
    account_type: 'real',
})

// Send provider-specific traits (recommended when using PostHog)
// PostHog requires `email` to automatically compute the `is_internal` flag
Analytics.identifyEvent('CR123456', {
    rudderstack: {
        language: 'en',
        custom_field: 'value',
    },
    posthog: {
        email: '[email protected]', // Required for PostHog — used to set is_internal flag
        language: 'en',
        country_of_residence: 'US',
    },
})

How it works:

• If you pass a simple object (e.g., { language: 'en' }), the same traits are sent to both providers
• If you pass an object with rudderstack or posthog keys, provider-specific traits are used
• Queues identify calls if provider not yet initialized
• PostHog automatically handles aliasing between anonymous and identified users
• When email is provided in PostHog traits, the is_internal flag is automatically computed and set as a person property — email itself is not forwarded to PostHog

Page Views

Track page navigation:

// Basic page view
Analytics.pageView('/dashboard')

// With custom platform name
Analytics.pageView('/dashboard', 'Deriv Trader')

// With additional properties
Analytics.pageView('/trade', 'Deriv App', {
    section: 'multipliers',
    instrument: 'forex',
})

Note: PostHog automatically captures page views when capture_pageview: true is set in config. Manual page view tracking is primarily for RudderStack.

User Attributes

Set user and context attributes that are automatically included in all subsequent events. Pass any key-value pairs — no fixed schema is enforced:

Analytics.setAttributes({
    country: 'US',
    user_language: 'en',
    account_type: 'real',
    device_type: 'mobile',
    account_currency: 'USD',
    account_mode: 'demo',
    residence_country: 'US',
    loggedIn: true,
    // any additional fields your app needs
})

Reset User Session

Clear user session from all providers (e.g., on logout):

Analytics.reset()

Caching & Offline Support

The package includes automatic caching to ensure no events are lost — no extra configuration needed.

localStorage Caching (SDK not yet loaded)

When you call trackEvent or pageView before initialise() completes, events are stored in localStorage and replayed automatically once the SDK loads:

// Safe to call before initialise() — automatically replayed on load
Analytics.trackEvent('button_clicked', { button: 'submit' })
Analytics.pageView('/dashboard')

In-Memory Caching (offline)

When the user is offline but the SDK is already initialized, events are held in memory and flushed on the next online trackEvent call:

// While offline — queued in memory, sent automatically when back online
Analytics.trackEvent('offline_event', { data: 'cached' })

Route-Based Events

Fire events only on specific pages using loadEvent:

Analytics.loadEvent([
    {
        pages: ['dashboard', 'profile'],
        event: { name: 'ce_page_load', properties: { page_type: 'authenticated' } },
    },
    {
        excludedPages: ['login'],
        event: { name: 'ce_authenticated_view', properties: {} },
    },
])

Debug Mode

Enable verbose logging to trace every analytics call in the browser console:

await Analytics.initialise({
    rudderstackKey: 'YOUR_KEY',
    posthogOptions: { apiKey: 'phc_YOUR_KEY' },
    debug: true,
})

All logs are prefixed with [ANALYTIC] (e.g., [ANALYTIC][RudderStack] trackEvent | ...). Useful during development and QA to verify events are firing correctly without opening the network tab.

Advanced Usage

Independent Package Usage

Each provider can be used independently for maximum flexibility:

PostHog Only

import { Posthog } from '@deriv-com/analytics/posthog'

const posthog = Posthog.getPosthogInstance({
    apiKey: 'phc_YOUR_KEY',
    config: {
        autocapture: true,
        session_recording: {
            recordCrossOriginIframes: true,
        },
    },
})

// Track events
posthog.capture('button_clicked', { button_name: 'signup' })

// Identify users — email is required and used to compute is_internal
posthog.identifyEvent('CR123', { email: '[email protected]', language: 'en' })

// Check feature flags
const isEnabled = posthog.isFeatureEnabled('new-feature')
const variant = posthog.getFeatureFlag('button-color')

RudderStack Only

import { RudderStack } from '@deriv-com/analytics/rudderstack'

const rudderstack = RudderStack.getRudderStackInstance('YOUR_KEY', () => {
    console.log('RudderStack loaded')
})

// Track events
rudderstack.track('button_clicked', { button: 'signup' })

// Identify users
rudderstack.identifyEvent('CR123', { language: 'en' })

// Track page views
rudderstack.pageView('/dashboard', 'Deriv App', 'CR123')

Access Provider Instances

Access raw provider instances for advanced use cases:

const { tracking, posthog } = Analytics.getInstances()

// Access PostHog directly
if (posthog?.has_initialized) {
    posthog.capture('custom_event', { property: 'value' })

    // Access PostHog feature flags
    const isEnabled = posthog.isFeatureEnabled('new-feature')
}

// Access RudderStack directly
if (tracking?.has_initialized) {
    const userId = tracking.getUserId()
    const anonId = tracking.getAnonymousId()
}

API Reference

initialise(options: Options): Promise<void>

Initialize the analytics instance.

Parameters:

interface Options {
    rudderstackKey?: string
    posthogOptions?: {
        apiKey: string
        /**
         * Optional PostHog API host. If omitted, resolved automatically based on window.location.hostname:
         *   *.deriv.me  → https://ph.deriv.me
         *   *.deriv.be  → https://ph.deriv.be
         *   *.deriv.ae  → https://ph.deriv.ae
         *   all others  → https://ph.deriv.com (default; also used server-side)
         */
        api_host?: string
        config?: PostHogConfig
    }
    /** Enable verbose debug logging — all analytics calls are logged prefixed with [ANALYTIC] */
    debug?: boolean
}

trackEvent(event: string, payload: Record<string, any>): void

Track an event. No payload schema is enforced — send any key-value pairs.

pageView(url: string, platform?: string, properties?: Record<string, unknown>): void

Track page navigation.

identifyEvent(userId?: string, traits?: Record<string, any>): void

Link anonymous session to a user ID with optional traits. When PostHog is active and traits include an email field (via provider-specific posthog key), is_internal is automatically computed and set as a person property — the email itself is not stored in PostHog.

backfillPersonProperties({ user_id, email?, country_of_residence? }): void

Backfills PostHog person properties for users identified in previous sessions. Sets client_id and is_internal if they are not already present. No-op if PostHog is not initialized or user_id is empty.

// Call after PostHog has loaded and user ID is available
Analytics.backfillPersonProperties({ user_id: 'CR123456', email: '[email protected]', country_of_residence: 'US' })

setAttributes(attributes: Record<string, any>): void

Update user attributes that flow to all providers. No schema is enforced.

loadEvent(items: PageLoadEventConfig[]): void

Fire events conditionally based on the current page pathname.

type PageLoadEventConfig = {
    pages?: string[] // fire only on these pages
    excludedPages?: string[] // fire on all pages except these
    event: { name: string; properties: Record<string, any> }
    callback?: () => { name: string; properties: Record<string, any> }
}

reset(): void

Clear user session from all providers.

getId(): string

Get the current user ID.

getAnonymousId(): string

Get the anonymous user ID.

getInstances(): { tracking, posthog }

Access raw provider instances.

Performance

Benchmarks

• Event tracking: <5ms (average)
• Page view tracking: <3ms (average)
• Initialization: ~200ms (with both providers)
• Offline cache replay: <50ms for 10 events

Optimizations

• Tree-Shaking: Unused providers completely removed from bundle
• Lazy Loading: PostHog loaded dynamically only when configured
• Event Batching: RudderStack batches events (10 events or 10 seconds)
• SendBeacon: Uses navigator.sendBeacon for reliable event delivery on page unload
• Deduplication: Prevents duplicate events from being sent

Bundle Sizes

Estimated sizes (minified + gzipped):

• Core (RudderStack + PostHog): ~32 KB
• RudderStack Only: ~18 KB
• PostHog Only: ~20 KB
• Browser Bundle (all included): ~125 KB gzipped

Troubleshooting

Events not appearing in RudderStack

1. Verify API key: Check that rudderstackKey is correct
2. Check network requests: Open DevTools → Network tab → Look for requests to RudderStack dataplane
3. Verify initialization: Run Analytics.getInstances().tracking.has_initialized in console
4. Check batching: Events are batched - wait ~10 seconds or send 10 events

PostHog not receiving events

1. Verify API key: Check that PostHog API key is correct (starts with phc_)
2. Check domain allowlist: Verify your domain is in the allowedDomains list
3. Check initialization: Run Analytics.getInstances().posthog?.has_initialized in console
4. Verify network requests: Check DevTools for requests to ph.deriv.com or your PostHog host
5. Check browser console: Look for PostHog errors or warnings

Session recording not working

1. Verify config: Ensure disable_session_recording: false (or omit it)
2. Check minimum duration: Sessions shorter than minimumDurationMilliseconds are not saved
3. Verify domain: Check that PostHog is initialized and domain is allowed
4. Check PostHog dashboard: Recordings may take a few minutes to appear

Events being cached but not sent

1. Check online status: Run navigator.onLine in console
2. Verify SDK loaded: Run Analytics.getInstances().tracking.has_initialized
3. Check storage: Open DevTools → Application → Local Storage — look for cached_analytics_events and cached_analytics_page_views keys. The rudder_anonymous_id is still stored as a cookie.
4. Clear cache manually: Clear localStorage keys or run Analytics.reset()

Migration Guide

From v1.x to v2.x

Breaking Changes

1. identifyEvent signature changed:

// Old (v1.x) - hardcoded traits
Analytics.identifyEvent('CR123')

// New (v2.x) - custom traits
Analytics.identifyEvent('CR123', {
    language: 'en',
    country_of_residence: 'US',
})

// Or provider-specific
Analytics.identifyEvent('CR123', {
    rudderstack: { language: 'en' },
    posthog: { language: 'en', country_of_residence: 'US' },
})

2. GrowthBook deprecated: Migrate to PostHog feature flags

// Old (GrowthBook)
const isEnabled = Analytics.isFeatureOn('new-feature')

// New (PostHog)
const { posthog } = Analytics.getInstances()
const isEnabled = posthog?.isFeatureEnabled('new-feature')

Contributing

Contributions are welcome! Please follow these guidelines:

1. Fork the repository
2. Create a feature branch
3. Write tests for your changes
4. Run npm test and npm run build
5. Submit a pull request

License

MIT

Support

For issues and questions:

• GitHub Issues: https://github.com/binary-com/deriv-analytics/issues
• Documentation: https://github.com/binary-com/deriv-analytics