> Fetch clean Markdown by appending `.md` to any page URL under https://signalwire.com/docs or requesting it with the HTTP header `Accept: text/markdown`. The root index at https://signalwire.com/docs/llms.txt lists the available documentation indexes.

# fallbackOutput

> Set the top-level fallback output used when no webhook or expression matches.

[ref-datamap]: /docs/server-sdks/reference/typescript/agents/data-map

[ref-functionresult]: /docs/server-sdks/reference/typescript/agents/function-result

Set a top-level fallback output used when no webhook or expression matches.

## **Parameters**

**`result`** `FunctionResult` — required

A [`FunctionResult`][ref-functionresult] defining the fallback response.

---

## **Returns**

[`DataMap`][ref-datamap] -- Self for method chaining.

## **Example**

```typescript {6}
import { DataMap, FunctionResult } from '@signalwire/sdk';

const dm = new DataMap('get_weather');
dm.webhook('GET', 'https://api.weather.com/v1/current?q=${args.city}');
dm.output(new FunctionResult('Weather: ${response.current.condition.text}'));
dm.fallbackOutput(new FunctionResult('Weather service is currently unavailable.'));
```

> Set the top-level fallback output used when no webhook or expression matches.