## WebExtensionPropertyCollection class

Represents the list of web extension properties.

```js
new WebExtensionPropertyCollection()
```

## Methods

| Name | Description |
| --- | --- |
| [add(name, value)](#add) | Adds web extension property. |
| [add()](#add-1) | Reserved for internal use. |
| [clear()](#clear) |  |
| [contains()](#contains) | Reserved for internal use. |
| [get(index)](#get) | Gets the property of web extension by the index. |
| [get(name)](#get-1) | Gets the property of web extension. |
| [get()](#get-2) | Reserved for internal use. |
| [getCount()](#getcount) |  |
| [indexOf()](#indexof) | Reserved for internal use. |
| [iterator()](#iterator) |  |
| [removeAt(name)](#removeat) | Remove the property by the name. |
| [removeAt()](#removeat-1) |  |

### add(name, value) {#add}

Adds web extension property.

| Parameter | Type | Description |
| --- | --- | --- |
| name | String | The name of property. |
| value | String | The value of property. |

**Returns:** Number — `Number` The index of added property.

### add() {#add-1}

Reserved for internal use.

### clear() {#clear}

### contains() {#contains}

Reserved for internal use.

### get(index) {#get}

Gets the property of web extension by the index.

| Parameter | Type | Description |
| --- | --- | --- |
| index | Number | The index. |

**Returns:** WebExtensionProperty — `WebExtensionProperty` The property of web extension.

### get(name) {#get-1}

Gets the property of web extension.

| Parameter | Type | Description |
| --- | --- | --- |
| name | String | The name of property. |

**Returns:** WebExtensionProperty — `WebExtensionProperty` The property of web extension.

### get() {#get-2}

Reserved for internal use.

### getCount() {#getcount}

### indexOf() {#indexof}

Reserved for internal use.

### iterator() {#iterator}

### removeAt(name) {#removeat}

Remove the property by the name.

| Parameter | Type | Description |
| --- | --- | --- |
| name | String | The name of the property. |

### removeAt() {#removeat-1}