# Javascript: TXTextControl.undo Method

> Undoes the last Text Control operation.

- **Product:** TX Text Control .NET Server
- **Section:** Reference
- **Kind:** Method
- **Introduced:** 28.0
- **Path:** TX Text Control .NET Server > Reference > JavaScript API > Javascript: TXTextControl.undo Method
- **284 words**
- **Web URL:** https://docs.textcontrol.com/tx-text-control-dotnet-server/reference/javascript/txtextcontrol/undo-method/
- **LLMs URL:** https://docs.textcontrol.com/tx-text-control-dotnet-server/reference/javascript/txtextcontrol/undo-method/llms.txt
- **LLMs-Full URL:** https://docs.textcontrol.com/tx-text-control-dotnet-server/reference/javascript/txtextcontrol/undo-method/llms-full.txt

---

### Description

Undoes the last Text Control operation.

### Syntax

```javascript
<void> TXTextControl.undo([<EmptyRequestCallback> callback], [<ErrorCallback> errorCallback])
```

### Parameters

| Parameter | Description |
|---|---|
| callback | Optional. Is called when the operation completed. |
| errorCallback | Optional. Is called when the operation failed with an error. |

### Examples

The following example demonstrates `TXTextControl.undo` in a practical document-editing workflow. Undoes the last Text Control operation.

```javascript
function onTxError(error) {
    console.error("TX Text Control error:", error.msg);
    error.handled = true;
}

TXTextControl.undo(
    function() {
        console.log("undo completed.");
    },
    onTxError
);
```

---

## Nearby

- **Previous:** [Javascript: TXTextControl.TextType Enumeration](https://docs.textcontrol.com/tx-text-control-dotnet-server/reference/javascript/txtextcontrol/texttype-enumeration/llms-full.txt)
- **Next:** [Javascript: TXTextControl.VerticalAlignment Enumeration](https://docs.textcontrol.com/tx-text-control-dotnet-server/reference/javascript/txtextcontrol/verticalalignment-enumeration/llms-full.txt)