## Update a custom asset

`client.customPages.assets.update(stringassetName, AssetUpdateParamsparams, RequestOptionsoptions?): AssetUpdateResponse`

**put** `/{accounts_or_zones}/{account_or_zone_id}/custom_pages/assets/{asset_name}`

Updates the configuration of an existing custom asset.

### Parameters

- `assetName: string`

  The unique name of the custom asset. Can only contain letters (A-Z, a-z), numbers (0-9), and underscores (_).

- `params: AssetUpdateParams`

  - `description: string`

    Body param: A short description of the custom asset.

  - `url: string`

    Body param: The URL where the asset content is fetched from.

  - `account_id?: string`

    Path param: The Account ID to use for this endpoint. Mutually exclusive with the Zone ID.

  - `zone_id?: string`

    Path param: The Zone ID to use for this endpoint. Mutually exclusive with the Account ID.

### Returns

- `AssetUpdateResponse`

  - `description?: string`

    A short description of the custom asset.

  - `last_updated?: string`

  - `name?: string`

    The unique name of the custom asset. Can only contain letters (A-Z, a-z), numbers (0-9), and underscores (_).

  - `size_bytes?: number`

    The size of the asset content in bytes.

  - `url?: string`

    The URL where the asset content is fetched from.

### Example

```node
import Cloudflare from 'cloudflare';

const client = new Cloudflare({
  apiEmail: process.env['CLOUDFLARE_EMAIL'], // This is the default and can be omitted
  apiKey: process.env['CLOUDFLARE_API_KEY'], // This is the default and can be omitted
});

const asset = await client.customPages.assets.update('my_custom_error_page', {
  description: 'Custom 500 error page',
  url: 'https://example.com/error.html',
  account_id: 'account_id',
});

console.log(asset.description);
```

#### Response

```json
{
  "errors": [
    {
      "code": 1000,
      "message": "message",
      "documentation_url": "documentation_url",
      "source": {
        "pointer": "pointer"
      }
    }
  ],
  "messages": [
    {
      "code": 1000,
      "message": "message",
      "documentation_url": "documentation_url",
      "source": {
        "pointer": "pointer"
      }
    }
  ],
  "success": true,
  "result": {
    "description": "Custom 500 error page",
    "last_updated": "2014-01-01T05:20:00.12345Z",
    "name": "my_custom_error_page",
    "size_bytes": 1024,
    "url": "https://example.com/error.html"
  }
}
```