calckey/packages/firefish-js/markdown/firefish-js.api.isapierror.md

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[Home](./index.md) &gt; [firefish-js](./firefish-js.md) &gt; [api](./firefish-js.api.md) &gt; [isAPIError](./firefish-js.api.isapierror.md)
## api.isAPIError() function
**Signature:**
```typescript
export declare function isAPIError(reason: any): reason is APIError;
```
## Parameters
| Parameter | Type | Description |
| --- | --- | --- |
| reason | any | |
**Returns:**
reason is [APIError](./firefish-js.api.apierror.md)