---
title: "Boxever.browserShow(browserId, clientKey, callback, format)"
slug: "bx-browsershow"
abstract: "Describes the browserShow() function in the Boxever JavaScript Library (Sitecore CDP Stream API)."
---
# Boxever.browserShow(browserId, clientKey, callback, format)

The `browserShow()` function retrieves the guest reference from Sitecore CDP.

The guest reference is in the `customer.ref` key of the parameter that is passed to the callback function.

## Parameters

| Parameter | Type | Description | Note |
| --- | --- | --- | --- |
| `browserId` | string | The browser ID. | Set the value to `Boxever.browser_id`. |
| `clientKey` | string | The client key. | Set the value to `Boxever.client_key`.<br><br>Or, to bypass authentication, set the value to `0`. |
| `callback` | function | This callback function handles the response. | The guest reference is in the `customer.ref` key of the parameter that is passed to the callback function. |
| `format` | string | The format of the response. | Set the value to `"json"`. Other formats are not supported. |

## Return value

undefined

## Example

In the callback function, using the `customer.ref` key, log the guest reference to the console:

```javascript
Boxever.browserShow(
    Boxever.browser_id,
    Boxever.client_key,
    response => console.log(response.customer.ref),
    "json"
);

// f7aabbca-1c1b-4fc2-be72-3e16294a4f03

```