---
title: "Function: isIframeApiException() | Customer's Canvas On-Premises"
canonical: "https://customerscanvas.com/docs/on-premises/design-editor/iframe-api/reference/design-editor-iframe/functions/Exception.isIframeApiException/"
---

# Function: isIframeApiException()

> > **isIframeApiException**(`ex`): `boolean`

## Parameters

### ex

`Error`

## Returns

`boolean`