## WebExtensionBinding class

Represents a binding relationship between an Office Add-in and the data in the document.

```javascript
class WebExtensionBinding;
```


## Constructors

| Constructor | Description |
| --- | --- |
| [constructor()](#constructor--)| Default Constructor. |

## Properties

| Property | Type | Description |
| --- | --- | --- |
| [id](#id--)| string | Gets and sets the binding identifier. |
| [type](#type--)| string | Gets and sets the binding type. |
| [appref](#appref--)| string | Gets and sets the binding key used to map the binding entry in this list with the bound data in the document. |

## Methods

| Method | Description |
| --- | --- |
| [getId()](#getId--)| <b>@deprecated.</b> Please use the 'id' property instead. Gets and sets the binding identifier. |
| [setId(string)](#setId-string-)| <b>@deprecated.</b> Please use the 'id' property instead. Gets and sets the binding identifier. |
| [getType()](#getType--)| <b>@deprecated.</b> Please use the 'type' property instead. Gets and sets the binding type. |
| [setType(string)](#setType-string-)| <b>@deprecated.</b> Please use the 'type' property instead. Gets and sets the binding type. |
| [getAppref()](#getAppref--)| <b>@deprecated.</b> Please use the 'appref' property instead. Gets and sets the binding key used to map the binding entry in this list with the bound data in the document. |
| [setAppref(string)](#setAppref-string-)| <b>@deprecated.</b> Please use the 'appref' property instead. Gets and sets the binding key used to map the binding entry in this list with the bound data in the document. |
| [isNull()](#isNull--)| Checks whether the implementation object is null. |


### constructor() {#constructor--}

Default Constructor.

```javascript
constructor();
```


### id {#id--}

Gets and sets the binding identifier.

```javascript
id : string;
```


### type {#type--}

Gets and sets the binding type.

```javascript
type : string;
```


### appref {#appref--}

Gets and sets the binding key used to map the binding entry in this list with the bound data in the document.

```javascript
appref : string;
```


### getId() {#getId--}

<b>@deprecated.</b> Please use the 'id' property instead. Gets and sets the binding identifier.

```javascript
getId() : string;
```


### setId(string) {#setId-string-}

<b>@deprecated.</b> Please use the 'id' property instead. Gets and sets the binding identifier.

```javascript
setId(value: string) : void;
```

**Parameters:**
| Parameter | Type | Description |
| --- | --- | --- |
| value | string | The value to set. |

### getType() {#getType--}

<b>@deprecated.</b> Please use the 'type' property instead. Gets and sets the binding type.

```javascript
getType() : string;
```


### setType(string) {#setType-string-}

<b>@deprecated.</b> Please use the 'type' property instead. Gets and sets the binding type.

```javascript
setType(value: string) : void;
```

**Parameters:**
| Parameter | Type | Description |
| --- | --- | --- |
| value | string | The value to set. |

### getAppref() {#getAppref--}

<b>@deprecated.</b> Please use the 'appref' property instead. Gets and sets the binding key used to map the binding entry in this list with the bound data in the document.

```javascript
getAppref() : string;
```


### setAppref(string) {#setAppref-string-}

<b>@deprecated.</b> Please use the 'appref' property instead. Gets and sets the binding key used to map the binding entry in this list with the bound data in the document.

```javascript
setAppref(value: string) : void;
```

**Parameters:**
| Parameter | Type | Description |
| --- | --- | --- |
| value | string | The value to set. |

### isNull() {#isNull--}

Checks whether the implementation object is null.

```javascript
isNull() : boolean;
```