---
title: "Events and hooks"
manual: "TYPO3 Explained"
version: "12.4"
permalink: "https://docs.typo3.org/permalink/t3coreapi:hooks@12.4"
source: "ApiOverview/Events/Index.rst"
rendered: "2026-10-21T15:29:37+00:00"
---

> [!WARNING]
> **Attention**
>
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> is no longer being maintained. Use the version switcher on the top
> left of this page to select documentation for a supported version of TYPO3.
>
> Need more time before upgrading?
> You can purchase Extended Long Term Support (ELTS) for TYPO3 v12 here:
> [TYPO3 ELTS](https://typo3.com/services/extended-support-elts).

# Events and hooks {#hooks}

Events and hooks provide an easy way to extend the functionality of the TYPO3 Core and
its extensions without blocking others to do the same.

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Signals and slots and all related classes have been removed from the
Core. Use PSR-14 events instead.

**Contents:**

-   [Extending the TYPO3 Core](https://docs.typo3.org/permalink/t3coreapi:extending-the-typo3-core@12.4)
-   [Event dispatcher (PSR-14 events)](https://docs.typo3.org/permalink/t3coreapi:event-dispatcher-psr-14-events@12.4)
-   [Event list](https://docs.typo3.org/permalink/t3coreapi:event-list@12.4)
-   [Hooks](https://docs.typo3.org/permalink/t3coreapi:hooks@12.4)
-   [JavaScript Event API](https://docs.typo3.org/permalink/t3coreapi:javascript-event-api@12.4)