# JavaScript

Namespace: **Wisej.Web**

Assembly: **Wisej.Framework** (4.0.0.0)

* [Component](/api/wisej.base/general/wisej.base.component.md)
  * [Component](/api/wisej.web/general/wisej.web.component.md)
    * [JavaScript](/api/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/hsR4ok3152WyAf8J2C1u) JavaScript()

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

### ![](/files/hsR4ok3152WyAf8J2C1u) JavaScript(container)

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

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

## Properties

### ![](/files/hsR4ok3152WyAf8J2C1u) Tag

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

## Methods

### ![](/files/hsR4ok3152WyAf8J2C1u) 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/dotnet/api/system.object) | The target object to add an extender property to. |

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

### ![](/files/hsR4ok3152WyAf8J2C1u) Clear()

Removes all scripts.

### ![](/files/lzopMboA31bVq8UIcbT3) Dispose(disposing)

Disposes the component and removes it from the design container.

| Parameter     | Type                                                            | Description                                                                 |
| ------------- | --------------------------------------------------------------- | --------------------------------------------------------------------------- |
| **disposing** | [Boolean](https://docs.microsoft.com/dotnet/api/system.boolean) | true when this method is called by the application rather than a finalizer. |

### ![](/files/hsR4ok3152WyAf8J2C1u) 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/wisej.web/general/control.md) | The [Control](/api/wisej.web/general/control.md) for which to retrieve the JavaScript code. |

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

### ![](/files/hsR4ok3152WyAf8J2C1u) GetJavaScriptEvents(control)

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

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

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

### ![](/files/hsR4ok3152WyAf8J2C1u) 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/wisej.web/general/control.md) | The [Control](/api/wisej.web/general/control.md) for which to retrieve the JavaScript file. |

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

### ![](/files/lzopMboA31bVq8UIcbT3) OnWebRender(config)

Renders the client component.

| Parameter  | Type                                                          | Description                   |
| ---------- | ------------------------------------------------------------- | ----------------------------- |
| **config** | [Object](https://docs.microsoft.com/dotnet/api/system.object) | Dynamic configuration object. |

### ![](/files/hsR4ok3152WyAf8J2C1u) SetJavaScript(control, script)

Associates JavaScript code with the specified control.

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

### ![](/files/hsR4ok3152WyAf8J2C1u) SetJavaScriptSource(control, file)

Associates JavaScript file with the specified control.

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

## Implements

| Name                                                                              | Description                                                                                                     |
| --------------------------------------------------------------------------------- | --------------------------------------------------------------------------------------------------------------- |
| [IUserData](/api/wisej.web/interfaces/wisej.web.iuserdata.md)                     | Provides access to the `UserData` and `Tag` properties associated to the component implementing this interface. |
| [IWisejComponent](/api/wisej.core/interfaces/wisej.core.iwisejcomponent.md)       | All wisej components implement this interface.                                                                  |
| [IWisejSerializable](/api/wisej.core/interfaces/wisej.core.iwisejserializable.md) | Allows an object to serialize itself.                                                                           |


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