Event Properties Reference

This document lists all properties automatically tracked by the Grain Analytics SDK and those that developers need to collect manually.

Legend

✅ Auto-tracked: Automatically collected by the SDK
🔧 Developer-collected: Must be manually tracked by developers
🔒 Consent-required: Only collected with user consent

Standard Events

`page_view`

Automatically tracked on every page navigation.

Property	Type	Tracking	Description
`page`	string	✅	Current page path (with or without query params based on config)
`title`	string	✅ 🔒	Document title
`full_url`	string	✅ 🔒	Complete URL including query params and hash
`referrer`	string	✅ 🔒	Previous page URL (document.referrer)
`referrer_domain`	string	✅ 🔒	Domain extracted from referrer
`referrer_category`	string	✅ 🔒	Categorized referrer: organic, paid, social, direct, email, referral
`previous_page`	string	✅ 🔒	Previous page within the same session
`landing_page`	string	✅ 🔒	First page of the session (only on subsequent page views)
`session_id`	string	✅ 🔒	Current session identifier
`utm_source`	string	✅ 🔒	UTM source parameter (if present)
`utm_medium`	string	✅ 🔒	UTM medium parameter (if present)
`utm_campaign`	string	✅ 🔒	UTM campaign parameter (if present)
`utm_term`	string	✅ 🔒	UTM term parameter (if present)
`utm_content`	string	✅ 🔒	UTM content parameter (if present)
`first_touch_source`	string	✅ 🔒	First-touch attribution source
`first_touch_medium`	string	✅ 🔒	First-touch attribution medium
`first_touch_campaign`	string	✅ 🔒	First-touch attribution campaign
`first_touch_referrer_category`	string	✅ 🔒	First-touch referrer category
`device`	string	✅	Device type (Mobile, Tablet, Desktop)
`browser`	string	✅	Browser name (Chrome, Firefox, Safari, Edge, Opera, Unknown)
`os`	string	✅	Operating system (Windows, macOS, Linux, Android, iOS, Unknown)
`language`	string	✅	Browser language (navigator.language)
`timezone`	string	✅	User timezone (e.g., “America/New_York”)
`screen_resolution`	string	✅	Screen resolution (e.g., “1920x1080”)
`viewport`	string	✅	Viewport size (e.g., “1440x900”)
`timestamp`	number	✅	Event timestamp (milliseconds since epoch)

`_grain_session_start`

Automatically tracked when a new session begins (page load).

Property	Type	Tracking	Description
`session_id`	string	✅	Unique session identifier
`landing_page`	string	✅ 🔒	First page of the session
`referrer`	string	✅ 🔒	Referrer URL (if present)
`referrer_domain`	string	✅ 🔒	Referrer domain (if present)
`referrer_category`	string	✅ 🔒	Categorized referrer source
`utm_source`	string	✅ 🔒	UTM source (if present)
`utm_medium`	string	✅ 🔒	UTM medium (if present)
`utm_campaign`	string	✅ 🔒	UTM campaign (if present)
`utm_term`	string	✅ 🔒	UTM term (if present)
`utm_content`	string	✅ 🔒	UTM content (if present)
`first_touch_source`	string	✅ 🔒	First-touch attribution source
`first_touch_medium`	string	✅ 🔒	First-touch attribution medium
`first_touch_campaign`	string	✅ 🔒	First-touch attribution campaign
`first_touch_referrer_category`	string	✅ 🔒	First-touch referrer category
`screen_resolution`	string	✅ 🔒	Screen resolution
`viewport`	string	✅ 🔒	Viewport size
`device`	string	✅	Device type (Mobile, Tablet, Desktop)
`browser`	string	✅	Browser name
`os`	string	✅	Operating system
`language`	string	✅ 🔒	Browser language
`timezone`	string	✅ 🔒	User timezone
`timestamp`	number	✅	Session start time

`_grain_session_end`

Automatically tracked when a session ends (page unload/close).

Property	Type	Tracking	Description
`session_id`	string	✅	Session identifier
`duration`	number	✅	Session duration in milliseconds
`event_count`	number	✅	Total events tracked during session
`page_count`	number	✅ 🔒	Total pages viewed during session
`timestamp`	number	✅	Session end time

`_grain_heartbeat`

Automatically tracked at regular intervals to measure engagement.

Property	Type	Tracking	Description
`heartbeat_type`	string	✅	Type: “periodic” or “page_load”
`status`	string	✅	User activity: “active” or “inactive”
`page`	string	✅ 🔒	Current page path
`session_id`	string	✅ 🔒	Current session identifier
`duration`	number	✅ 🔒	Time since last heartbeat (periodic only)
`event_count`	number	✅ 🔒	Events since last heartbeat (periodic only)
`timestamp`	number	✅	Heartbeat timestamp

`_grain_consent_granted`

Tracked when user grants analytics consent.

Property	Type	Tracking	Description
`previous_session_id`	string	✅	Ephemeral session ID before consent
`new_user_id`	string	✅	Persistent user ID after consent
`timestamp`	number	✅	Consent grant time

Template Events

These events are available via SDK helper methods but require manual triggering. Track user authentication.

grain.trackLogin({
  method: 'email', // or 'google', 'facebook', etc.
  success: true,
  errorMessage: 'Invalid credentials', // if success = false
  loginAttempt: 1,
  rememberMe: true,
  twoFactorEnabled: false,
});

Property	Type	Tracking	Description
`method`	string	🔧	Authentication method
`success`	boolean	🔧	Whether login succeeded
`errorMessage`	string	🔧	Error message (if failed)
`loginAttempt`	number	🔧	Login attempt number
`rememberMe`	boolean	🔧	Whether “remember me” was checked
`twoFactorEnabled`	boolean	🔧	Whether 2FA is enabled

Track user registration.

grain.trackSignup({
  method: 'email',
  source: 'landing_page',
  plan: 'free',
  success: true,
});

Property	Type	Tracking	Description
`method`	string	🔧	Registration method
`source`	string	🔧	Where user signed up from
`plan`	string	🔧	Selected plan
`success`	boolean	🔧	Whether signup succeeded
`errorMessage`	string	🔧	Error message (if failed)

`purchase`

Track completed purchases.

grain.trackPurchase({
  orderId: 'ORD-12345',
  total: 99.99,
  currency: 'USD',
  items: [
    { id: 'ITEM-1', name: 'Product A', price: 49.99, quantity: 2, category: 'electronics' }
  ],
  paymentMethod: 'credit_card',
  shippingMethod: 'express',
  tax: 8.50,
  shipping: 5.99,
  discount: 10.00,
  couponCode: 'SAVE10',
});

Property	Type	Tracking	Description
`orderId`	string	🔧	Unique order identifier
`total`	number	🔧	Total order amount
`currency`	string	🔧	Currency code (USD, EUR, etc.)
`items`	array	🔧	Array of purchased items
`paymentMethod`	string	🔧	Payment method used
`shippingMethod`	string	🔧	Shipping method selected
`tax`	number	🔧	Tax amount
`shipping`	number	🔧	Shipping cost
`discount`	number	🔧	Discount amount
`couponCode`	string	🔧	Applied coupon code

`checkout`

Track checkout initiation.

grain.trackCheckout({
  orderId: 'ORD-12345',
  total: 99.99,
  currency: 'USD',
  items: [/* ... */],
  paymentMethod: 'credit_card',
  success: true,
});

Properties same as purchase event

`search`

Track search queries.

grain.track('search', {
  query: 'wireless headphones',
  results: 42,
  filters: { category: 'electronics', price: 'under-50' },
  sortBy: 'popularity',
  category: 'products',
  success: true,
});

Property	Type	Tracking	Description
`query`	string	🔧	Search query text
`results`	number	🔧	Number of results found
`filters`	object	🔧	Applied filters
`sortBy`	string	🔧	Sort order
`category`	string	🔧	Search category
`success`	boolean	🔧	Whether search succeeded

`add_to_cart`

Track items added to cart.

grain.trackAddToCart({
  itemId: 'PROD-123',
  itemName: 'Wireless Headphones',
  price: 49.99,
  quantity: 1,
  currency: 'USD',
  category: 'electronics',
  variant: 'black',
});

Property	Type	Tracking	Description
`itemId`	string	🔧	Product ID
`itemName`	string	🔧	Product name
`price`	number	🔧	Unit price
`quantity`	number	🔧	Quantity added
`currency`	string	🔧	Currency code
`category`	string	🔧	Product category
`variant`	string	🔧	Product variant (color, size, etc.)

`remove_from_cart`

Track items removed from cart. Properties same as add_to_cart event

Custom Events

You can track any custom event with your own properties:

grain.track('button_clicked', {
  button_id: 'signup-cta',
  button_text: 'Get Started',
  page: '/pricing',
  position: 'hero',
});

New to event naming? Check out our Event Naming Convention guide for a systematic approach to naming custom events. It provides a hierarchical structure that makes events clear, consistent, and easy to query.

Automatic Property Enrichment

Important: All custom events (except system events starting with _grain_) are automatically enriched with the following properties: Always included (no consent required):

Device Info: device (Mobile/Tablet/Desktop), browser, os

Included when user consent is granted:

UTM Parameters: utm_source, utm_medium, utm_campaign, utm_term, utm_content (from the current session)
First-Touch Attribution: first_touch_source, first_touch_medium, first_touch_campaign, first_touch_referrer_category
Session ID: session_id

This ensures that all events have device context and attribution data for matrix analysis and conversion tracking, even if you don’t explicitly include these properties in your custom events. Example: When you track a signup event:

grain.track('signup', { plan: 'pro' });

The actual event sent will include:

{
  plan: 'pro',
  device: 'Desktop',            // Auto-added (always)
  browser: 'Chrome',            // Auto-added (always)
  os: 'macOS',                  // Auto-added (always)
  utm_source: 'google',         // Auto-added from session
  utm_medium: 'cpc',            // Auto-added from session
  utm_campaign: 'spring_sale',  // Auto-added from session
  first_touch_source: 'google', // Auto-added
  first_touch_campaign: 'spring_sale', // Auto-added
  session_id: '...',            // Auto-added
  // ... other first-touch properties
}

Recommended Custom Properties

When tracking custom events, consider including:

Context: page, section, component
Action details: action_type, target, value
User state: is_authenticated, user_plan, user_role
Experiment: experiment_id, variant
Performance: duration, load_time

Property Scope

Event-Scoped Properties

Properties that exist on the specific event being tracked. Most properties are event-scoped.

User-Scoped Properties

Properties that exist on any event for a given user. In Matrices, you can query by “User Property (Any Event)” to find users who have logged this property at least once, even if not on the specific event being analyzed. Examples:

first_touch_* - Set on session_start, can be queried on any event
utm_* - Set on page_view, can be queried on conversion events
Custom user properties set via grain.setProperty()

Referrer Categories

The SDK automatically categorizes referrers:

organic: Search engines (Google, Bing, Yahoo, etc.)
paid: Paid advertising (detected via gclid, fbclid, etc.)
social: Social media (Facebook, Twitter, LinkedIn, etc.)
email: Email clients (Gmail, Outlook, etc.)
referral: Other websites
direct: No referrer (direct navigation or bookmark)

Browser Detection

Supported browsers:

Chrome
Firefox
Safari
Edge
Opera
Unknown (for unrecognized browsers)

OS Detection

Supported operating systems:

Windows
macOS
Linux
Android
iOS
Unknown (for unrecognized systems)

Best Practices

Only log relevant properties: Don’t send null/undefined values
Use consistent naming: snake_case for property names
Include context: Add page/section/component for UI events
Track user flow: Use consistent event names across journeys
Test attribution: Verify UTM parameters and referrer tracking
Respect privacy: Only collect necessary data, honor consent

Configuration

Disable Auto-Properties

To disable automatic property collection:

const grain = createGrainAnalytics({
  tenantId: 'your-tenant-id',
  disableAutoProperties: true,
});

Strip Query Parameters

To remove query params from page URLs:

const grain = createGrainAnalytics({
  tenantId: 'your-tenant-id',
  stripQueryParams: true, // default: true
});

Property Whitelist

To limit which properties can be tracked:

const grain = createGrainAnalytics({
  tenantId: 'your-tenant-id',
  allowedProperties: ['page', 'button_id', 'action'],
});

Need Help?

Documentation: docs.grainql.com
Dashboard: grainql.com/dashboard
Issues: GitHub Issues
Email: support@grainql.com

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Event properties

Event Properties Reference

Legend

Standard Events

`page_view`

`_grain_session_start`

`_grain_session_end`

`_grain_heartbeat`

`_grain_consent_granted`

Template Events

`purchase`

`checkout`

`search`

`add_to_cart`

`remove_from_cart`

Custom Events

Automatic Property Enrichment

Recommended Custom Properties

Property Scope

Event-Scoped Properties

User-Scoped Properties

Referrer Categories

Browser Detection

OS Detection

Best Practices

Configuration

Disable Auto-Properties

Strip Query Parameters

Property Whitelist

Need Help?

​Event Properties Reference

​Legend

​Standard Events

​page_view

​_grain_session_start

​_grain_session_end

​_grain_heartbeat

​_grain_consent_granted

​Template Events

​login

​signup

​purchase

​checkout

​search

​add_to_cart

​remove_from_cart

​Custom Events

​Automatic Property Enrichment

​Recommended Custom Properties

​Property Scope

​Event-Scoped Properties

​User-Scoped Properties

​Referrer Categories

​Browser Detection

​OS Detection

​Best Practices

​Configuration

​Disable Auto-Properties

​Strip Query Parameters

​Property Whitelist

​Need Help?

Event Properties Reference

Legend

Standard Events

`page_view`

`_grain_session_start`

`_grain_session_end`

`_grain_heartbeat`

`_grain_consent_granted`

Template Events

`login`

`signup`

`purchase`

`checkout`

`search`

`add_to_cart`

`remove_from_cart`

Custom Events

Automatic Property Enrichment

Recommended Custom Properties

Property Scope

Event-Scoped Properties

User-Scoped Properties

Referrer Categories

Browser Detection

OS Detection

Best Practices

Configuration

Disable Auto-Properties

Strip Query Parameters

Property Whitelist

Need Help?