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{% comment %}
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# FunctionsError class
An error returned by the Firebase Functions client SDK.

See [FunctionsErrorCode](./functions.md#functionserrorcode) for full documentation of codes.

<b>Signature:</b>

```typescript
export declare class FunctionsError extends FirebaseError 
```
<b>Extends:</b> [FirebaseError](./util.firebaseerror.md#firebaseerror_class)

## Constructors

|  Constructor | Modifiers | Description |
|  --- | --- | --- |
|  [(constructor)(code, message, details)](./functions.functionserror.md#functionserrorconstructor) |  | Constructs a new instance of the <code>FunctionsError</code> class. |

## Properties

|  Property | Modifiers | Type | Description |
|  --- | --- | --- | --- |
|  [details](./functions.functionserror.md#functionserrordetails) |  | unknown | Additional details to be converted to JSON and included in the error response. |

## FunctionsError.(constructor)

Constructs a new instance of the `FunctionsError` class.

<b>Signature:</b>

```typescript
constructor(
    code: FunctionsErrorCode, message?: string, 
    details?: unknown);
```

#### Parameters

|  Parameter | Type | Description |
|  --- | --- | --- |
|  code | [FunctionsErrorCode](./functions.md#functionserrorcodecore) |  |
|  message | string |  |
|  details | unknown |  |

## FunctionsError.details

Additional details to be converted to JSON and included in the error response.

<b>Signature:</b>

```typescript
readonly details?: unknown;
```