Enable event access and modification before sending data to Coralogix using `beforeSend`. This feature allows you to modify content or discard events as needed.

## Overview

The `beforeSend` callback method can be configured to filter error events just before they are sent to the server. This method provides a final opportunity to decide whether to send or modify the data. The `beforeSend` function receives the event object as a parameter, allowing you to use custom logic to either alter the event’s data or discard it entirely by returning null.

## Usage

Here is an example demonstrating how to use `beforeSend`:

```js
CoralogixRum.init({
  // ...
  beforeSend: (event) => {
    // Discard events from @company.com users.
    if (event.session_context.user_email?.endsWith('@company.com')) {
      return null;
    }

    // Redact sensitive information from the page URL.
    event.page_context.page_url = event.page_context.page_url.replace(
      'sensitive-info',
      'redacted'
    );

    return event;
  },
});
```

**Notes**:

- To retain the event, you must `return event`.
- To discard the event, return `null`.

## Support

**Need help?**

Our world-class customer success team is available 24/7 to assist you with your setup and answer any questions you may have.

Feel free to reach out to us **via our in-app chat** or by emailing [support@coralogix.com](mailto:support@coralogix.com).