--- title: Zaraz Context description: Data available in the Zaraz context object for triggers and actions. image: https://developers.cloudflare.com/dev-products-preview.png --- > Documentation Index > Fetch the complete documentation index at: https://developers.cloudflare.com/zaraz/llms.txt > Use this file to discover all available pages before exploring further. [Skip to content](#%5Ftop) # Zaraz Context The Zaraz Context is a versatile object that provides a set of configurable properties for Zaraz, a web analytics tool for tracking user behavior on websites. These properties can be accessed and utilized across various components, including [Worker Variables](https://developers.cloudflare.com/zaraz/variables/worker-variables/) and [JSONata expressions](https://developers.cloudflare.com/zaraz/advanced/using-jsonata/). System properties, which are automatically collected by Zaraz, provide insights into the user's environment and device, while Client properties, obtained through [Zaraz Web API](https://developers.cloudflare.com/zaraz/web-api/) calls like zaraz.track(), offer additional information on user behavior and actions. ## System properties ### Page information | Property | Type | Description | | -------------------- | ------ | ----------------------------------------------------------------------------------------------------------------- | | system.page.query | Object | Key-Value object containing all query parameters in the current URL. | | system.page.title | String | Current page title. | | system.page.url | URL | [URL ↗](https://developer.mozilla.org/en-US/docs/Web/API/URL) Object containing information about the current URL | | system.page.referrer | String | Current page referrer from document.referrer. | | system.page.encoding | String | Current page character encoding from document.characterSet. | ### Cookies | Property | Type | Description | | -------------- | ------ | ------------------------------------------------ | | system.cookies | Object | Key-Value object containing all present cookies. | The keys inside the `system.cookies` are the cookies name. The property `system.cookies.foo` will return the value of the a cookie named `foo`. ### Device information | Property | Type | Description | | ---------------------------------------- | ------ | --------------------------------------------------------------------------------------------------------------------------------------------------------- | | system.device.ip | String | Visitor incoming IP address. | | system.device.resolution | String | Screen resolution for device. | | system.device.viewport | String | Visible web page area in user’s device. | | system.device.language | String | Language used in user's device. | | system.device.location | Object | All location-related keys from [IncomingRequestCfProperties](https://developers.cloudflare.com/workers/runtime-apis/request/#incomingrequestcfproperties) | | system.device.user-agent.ua | String | Browser user agent. | | system.device.user-agent.browser.name | String | Browser name. | | system.device.user-agent.browser.version | String | Browser version. | | system.device.user-agent.engine.name | String | Type of browser engine (for example, WebKit). | | system.device.user-agent.engine.version | String | Version of the browser engine. | | system.device.user-agent.os.name | String | Operating system. | | system.device.user-agent.os.version | String | Version of the operating system. | | system.device.user-agent.device | String | Type of device used (for example, iPhone). | | system.device.user-agent.cpu | String | Device’s CPU. | ### Consent Management | Property | Type | Description | | -------------- | ------ | -------------------------------------------------------------------------------------- | | system.consent | Object | Key-value object containing the current consent status from the Zaraz Consent Manager. | The keys inside the `system.consent` object are purpose IDs, and values are `true` for consent, `false` for lack of consent. ### Managed Components | Property | Type | Description | | --------------- | ------ | ------------------------------------------------------------------------- | | system.clientKV | Object | Key-value object containing all the KV data from your Managed Components. | The keys inside the `system.clientKV` object are formatted as Tool ID, underscore, Key name. Assuming you want to read the value of the `ga4` key used by a tool with ID `abcd`, the path would be `system.clientKV.abcd_ga4`. ### Miscellaneous | Property | Type | Description | | --------------------------------- | ------ | ------------------------------------- | | system.misc.random | Number | Random number unique to each request. | | system.misc.timestamp | Number | Unix time in seconds. | | system.misc.timestampMilliseconds | Number | Unix time in milliseconds. | ## Event properties | Property | Type | Description | | --------------------- | ------ | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | client.\_\_zarazTrack | String | Returns the name of the event sent using the Track method of the Web API. Refer to [Zaraz Track](https://developers.cloudflare.com/zaraz/web-api/track/) for more information. | | client. | String | Returns the value of a zaraz.track() eventProperties key. The key can either be directly used in zaraz.track() or set using zaraz.set(). Replace with the name of your key. Refer to [Zaraz Track](https://developers.cloudflare.com/zaraz/web-api/track/) for more information. | ```json {"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"item":{"@id":"/directory/","name":"Directory"}},{"@type":"ListItem","position":2,"item":{"@id":"/zaraz/","name":"Zaraz"}},{"@type":"ListItem","position":3,"item":{"@id":"/zaraz/reference/","name":"Reference"}},{"@type":"ListItem","position":4,"item":{"@id":"/zaraz/reference/context/","name":"Zaraz Context"}}]} ```