> For the complete documentation index, see [llms.txt](https://docs.wisej.com/api/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.wisej.com/api/v3.0/wisej.web/extenders/javascript.md).

# JavaScript

Namespace: **Wisej.Web**

Assembly: **Wisej.Framework** (3.0.0.0)

* [Component](/api/v3.0/wisej.base/general/wisej.base.component.md)
  * [Component](/api/v3.0/wisej.web/general/wisej.web.component.md)
    * [JavaScript](/api/v3.0/wisej.web/extenders/javascript.md)

Allows controls to execute javascript code.

{% tabs %}
{% tab title="C#" %}

```csharp
public class JavaScript : Component, IExtenderProvider
```

{% endtab %}

{% tab title="VB.NET" %}

```visual-basic
Public Class JavaScript
    Inherits Component
    Implements IExtenderProvider
```

{% endtab %}
{% endtabs %}

## Constructors

### ![](/files/uCY6T77rh488FWHzpJ6P)JavaScript()

Initializes a new instance of the [JavaScript](/api/v3.0/wisej.web/extenders/javascript.md) without a specified container.

### ![](/files/uCY6T77rh488FWHzpJ6P)JavaScript(container)

Initializes a new instance of the [JavaScript](/api/v3.0/wisej.web/extenders/javascript.md) class with a specified container.

| Name          | Type                                                                                       | Description                                                                                                                                                                                            |
| ------------- | ------------------------------------------------------------------------------------------ | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |
| **container** | [IContainer](https://docs.microsoft.com/en-us/dotnet/api/system.componentmodel.icontainer) | An [IContainer](https://docs.microsoft.com/en-us/dotnet/api/system.componentmodel.icontainer) that represents the container of the [JavaScript](/api/v3.0/wisej.web/extenders/javascript.md) extender. |

## Properties

### ![](/files/uCY6T77rh488FWHzpJ6P)Tag

[Object](https://docs.microsoft.com/en-us/dotnet/api/system.object): Returns or sets the object that contains programmer-supplied data associated with the [JavaScript](/api/v3.0/wisej.web/extenders/javascript.md) extender.

## Methods

### ![](/files/uCY6T77rh488FWHzpJ6P)CanExtend(target)

Returns true if the JavaScript extender can offer an extender property to the specified target component.

| Parameter  | Type                                                                | Description                                       |
| ---------- | ------------------------------------------------------------------- | ------------------------------------------------- |
| **target** | [Object](https://docs.microsoft.com/en-us/dotnet/api/system.object) | The target object to add an extender property to. |

**Returns:** [Boolean](https://docs.microsoft.com/en-us/dotnet/api/system.boolean). true if the [JavaScript](/api/v3.0/wisej.web/extenders/javascript.md) class can offer one or more extender properties; otherwise, false.

### ![](/files/uCY6T77rh488FWHzpJ6P)Clear()

Removes all scripts.

### ![](/files/uCY6T77rh488FWHzpJ6P)GetJavaScript(control)

Retrieves the JavaScript code associated with the specified control. The JavaScript code will be execute on the client when the control is created or refreshed.

| Parameter   | Type                                              | Description                                                                                      |
| ----------- | ------------------------------------------------- | ------------------------------------------------------------------------------------------------ |
| **control** | [Control](/api/v3.0/wisej.web/general/control.md) | The [Control](/api/v3.0/wisej.web/general/control.md) for which to retrieve the JavaScript code. |

**Returns:** [String](https://docs.microsoft.com/en-us/dotnet/api/system.string). A [String](https://docs.microsoft.com/en-us/dotnet/api/system.string) containing the javascript code for the specified control.

### ![](/files/uCY6T77rh488FWHzpJ6P)GetJavaScriptEvents(control)

Returns the collection of JavaScript event handlers associated with the control.

| Parameter   | Type                                              | Description                                                                                       |
| ----------- | ------------------------------------------------- | ------------------------------------------------------------------------------------------------- |
| **control** | [Control](/api/v3.0/wisej.web/general/control.md) | The [Control](/api/v3.0/wisej.web/general/control.md) to attach the JavaScript event handlers to. |

**Returns:** [ClientEventCollection](/api/v3.0/wisej.web/general/control/wisej.web.javascript.clienteventcollection.md).

### ![](/files/uCY6T77rh488FWHzpJ6P)GetJavaScriptSource(control)

Retrieves the JavaScript file associated with the specified control. The JavaScript code will be execute on the client when the control is created or refreshed.

| Parameter   | Type                                              | Description                                                                                      |
| ----------- | ------------------------------------------------- | ------------------------------------------------------------------------------------------------ |
| **control** | [Control](/api/v3.0/wisej.web/general/control.md) | The [Control](/api/v3.0/wisej.web/general/control.md) for which to retrieve the JavaScript file. |

**Returns:** [String](https://docs.microsoft.com/en-us/dotnet/api/system.string). A [String](https://docs.microsoft.com/en-us/dotnet/api/system.string) containing the name of the javascript file for the specified control.

### ![](/files/uCY6T77rh488FWHzpJ6P)SetJavaScript(control, script)

Associates JavaScript code with the specified control.

| Parameter   | Type                                                                | Description                                                                             |
| ----------- | ------------------------------------------------------------------- | --------------------------------------------------------------------------------------- |
| **control** | [Control](/api/v3.0/wisej.web/general/control.md)                   | The [Control](/api/v3.0/wisej.web/general/control.md) to associate the JavaScript with. |
| **script**  | [String](https://docs.microsoft.com/en-us/dotnet/api/system.string) | The JavaScript code to execute when the control is created.                             |

### ![](/files/uCY6T77rh488FWHzpJ6P)SetJavaScriptSource(control, file)

Associates JavaScript file with the specified control.

| Parameter   | Type                                                                | Description                                                                                  |
| ----------- | ------------------------------------------------------------------- | -------------------------------------------------------------------------------------------- |
| **control** | [Control](/api/v3.0/wisej.web/general/control.md)                   | The [Control](/api/v3.0/wisej.web/general/control.md) to associate the JavaScript file with. |
| **file**    | [String](https://docs.microsoft.com/en-us/dotnet/api/system.string) | The JavaScript file to execute when the control is created.                                  |

## Implements

| Name                                                                                   | Description                                    |
| -------------------------------------------------------------------------------------- | ---------------------------------------------- |
| [IWisejComponent](/api/v3.0/wisej.core/interfaces/wisej.core.iwisejcomponent.md)       | All wisej components implement this interface. |
| [IWisejSerializable](/api/v3.0/wisej.core/interfaces/wisej.core.iwisejserializable.md) | Allows an object to serialize itself.          |


---

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