# Instance

**Kind**: interface | **Module**: [IFrames](https://docs.interop.io/browser/reference/javascript/iframes/index.md)

**Source**: https://docs.interop.io/browser/reference/javascript/iframes/instance/index.html

Describes the instance of an app opened in an `<iframe>` element.

## Properties

- **`appName`** (`string`, required)
  Name of the app as specified in its definition.
- **`id`** (`string`, required)
  Interop ID of the app instance.
- **`iframe`** (`HTMLIFrameElement`, required)
  The `<iframe>` element in which the app is rendered.
- **`parentId`** (`string`, required)
  Interop ID of the parent app instance.