## DigitalSignatureCollection class

Provides a collection of digital signatures attached to a document.

```javascript
class DigitalSignatureCollection implements Iterable<DigitalSignature>;
```


## Constructors

| Constructor | Description |
| --- | --- |
| [constructor()](#constructor--)| The constructor of DigitalSignatureCollection. |

## Methods

| Method | Description |
| --- | --- |
| [add(DigitalSignature)](#add-digitalsignature-)| Add one signature to DigitalSignatureCollection. |
| [getEnumerator()](#getEnumerator--)| Get the enumerator for DigitalSignatureCollection, this enumerator allows iteration over the collection |
| [isNull()](#isNull--)| Checks whether the implementation object is null. |

## \[Symbol.iterator\](): Iterator\<DigitalSignature\>

Returns an iterator over the items in the collection. Enables use of `for...of`, spread syntax, and `Array.from()`.



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

The constructor of DigitalSignatureCollection.

```javascript
constructor();
```


### add(DigitalSignature) {#add-digitalsignature-}

Add one signature to DigitalSignatureCollection.

```javascript
add(digitalSignature: DigitalSignature) : void;
```

**Parameters:**
| Parameter | Type | Description |
| --- | --- | --- |
| digitalSignature | [DigitalSignature](../digitalsignature/) | Digital signature in collection. |

### getEnumerator() {#getEnumerator--}

Get the enumerator for DigitalSignatureCollection, this enumerator allows iteration over the collection

```javascript
getEnumerator() : DigitalSignatureEnumerator;
```


**Returns**

The enumerator to iteration.

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

Checks whether the implementation object is null.

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