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## Resource: About Event Extensions

## Article: About Event Extensions

## Article Link: https://dev.wix.com/docs/build-apps/develop-your-app/extensions/backend-extensions/events/about-event-extensions.md

## Article Content:

# About Event Extensions

[Events](https://dev.wix.com/docs/build-apps/develop-your-app/api-integrations/events-and-webhooks/about-events.md) are triggered when specific conditions on your app or a user's site are met. Your app can include code that runs when an event occurs.

For example, an event might be triggered when a [booking is confirmed](https://dev.wix.com/docs/sdk/backend-modules/bookings/bookings/on-booking-confirmed.md). You can implement logic, such as sending a booking confirmation email, when the event is triggered.

Use event extensions to handle events in the [Wix CLI](https://dev.wix.com/docs/wix-cli/guides/about-the-wix-cli.md). You can define events in the CLI using Javascript SDK webhooks. Event extensions subscribe your app to these webhooks.

<blockquote class="tip">

__Tip:__
- In Wix Blocks, you can [handle events using Velo](https://dev.wix.com/docs/develop-websites/articles/coding-with-velo/backend-code/events/about-backend-events.md).
- When self-hosting, you can implement [webhooks](https://dev.wix.com/docs/build-apps/develop-your-app/api-integrations/events-and-webhooks/about-webhooks.md) using REST APIs or the Javascript SDK.

</blockquote>

## See also
- [About Events](https://dev.wix.com/docs/build-apps/develop-your-app/api-integrations/events-and-webhooks/about-events.md)
- [Add Event Extensions with the CLI](https://dev.wix.com/docs/wix-cli/guides/extensions/backend-extensions/events/add-event-extensions.md)