---
title: Status Hooks
description: Execute Workers code in reaction to Container status changes
image: https://developers.cloudflare.com/dev-products-preview.png
---

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# Status Hooks

**Last reviewed:**  11 months ago 

Execute Workers code in reaction to Container status changes

When a Container starts, stops, becomes idle, and errors, it can trigger code execution in a Worker that has defined status hooks on the `Container` class. Refer to the [Container class lifecycle hooks](https://developers.cloudflare.com/containers/container-class/#lifecycle-hooks) for more details.

TypeScript

```

import { Container } from "@cloudflare/containers";


export class MyContainer extends Container {

  defaultPort = 4000;

  sleepAfter = "5m";


  override onStart() {

    console.log("Container successfully started");

  }


  override onStop(stopParams) {

    if (stopParams.exitCode === 0) {

      console.log("Container stopped gracefully");

    } else {

      console.log("Container stopped with exit code:", stopParams.exitCode);

    }


    console.log("Container stop reason:", stopParams.reason);

  }


  override async onActivityExpired() {

    console.log("Container became idle, stopping it now");

    await this.stop();

  }


  override onError(error: string) {

    console.log("Container error:", error);

  }

}


```

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```