# On List Active Index Change

## Overview

![The On List Active Index Change Node.](/files/E6DCvAZ5lpFdrWlA7Qpn)

The **On List Active Index Change** is an **Event Listener** **Node** used for executing a **Logic Branch** when a **List's** `Active Index` changes.

The `Active Index` of a [**List**](/incari-studio/2023.1/objects-and-types/scene2d-objects/gui/list.md) is the place of the active item in its order. Indexing starts at 0, so if the very first element of the **List** is the active item, the `Active Index` would be 0.

[**Scope**](/incari-studio/2023.1/toolbox/overview.md#scopes): **Scene**, **Prefab**.

## Inputs

| Input             | Type         | Description                                                                        |
| ----------------- | ------------ | ---------------------------------------------------------------------------------- |
| *Pulse Input* (►) | **Pulse**    | A standard **Input Pulse**, to trigger the execution of the **Node**.              |
| `Object ID`       | **ObjectID** | The **Object** in which an `Active Index` change triggers the **Logic Branch**.    |
| `Subscribe` (►)   | **Pulse**    | An **Input Pulse** that needs to be triggered to start listening to the **Event**. |

## Outputs

| Output             | Type         | Description                                                                                                                            |
| ------------------ | ------------ | -------------------------------------------------------------------------------------------------------------------------------------- |
| *Pulse Output* (►) | **Pulse**    | A standard **Output Pulse**, to move onto the next **Node** along the **Logic Branch**, once this **Node** has finished its execution. |
| `Current Index`    | **Int**      | The current `Active Index`.                                                                                                            |
| `Object ID`        | **ObjectID** | The **Object** received as **Input**.                                                                                                  |


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