# onIsReadOnlyChanged

> Calls the methods in its invocation list when TextInputBaseField<TValueType>.isReadOnly changes.

## Definition

* **Type:** Property
* **Namespace:** [UnityEngine.UIElements](/engine/6000.3/script-reference/unityengine/uielements.md)
* **Assembly:** UnityEngine.UIElementsModule

```csharp
protected Action<bool> onIsReadOnlyChanged { get; set; }
```