# liveAgent:clientChatInput

The text box in a chat window where a visitor types messages to an agent.

Must be used within `<liveAgent:clientChat>`. Each chat window can have only one input box.

## Attributes

| Attribute Name        | Attribute Type | Description                                                                                                                  | Required? | API Version | Access |
| --------------------- | -------------- | ---------------------------------------------------------------------------------------------------------------------------- | --------- | ----------- | ------ |
| `autoResizeElementId` | String         | Specifies the HTML element that should be dynamically resized when the transcript exceeds a certain length.                  |           | 24.0        |        |
| `id`                  | String         | An identifier that allows the component to be referenced by other components in the page.                                    |           | 14.0        | global |
| `rendered`            | Boolean        | A Boolean value that specifies whether the component is rendered on the page. If not specified, this value defaults to true. |           | 14.0        | global |
| `useMultiline`        | Boolean        | Specifies whether a customer chat window supports a multiple-line text input field (true) or not (false).                    |           | 24.0        |        |

**See Also**

- [liveAgent:clientChat](/docs/platform/salesforce-pages-developers-guide/guide/pages-compref-liveagent-clientchat.md)