> ## Documentation Index
> Fetch the complete documentation index at: https://docs.nanoforge.eu/llms.txt
> Use this file to discover all available pages before exploring further.

# TransformToBoolean function

> Property decorator that transforms the string environment variable value "true" or "false" into a native boolean.

import { PageLink } from '/snippets/tsdocs/PageLink.jsx';
import { RefLink } from '/snippets/tsdocs/RefLink.jsx';

# TransformToBoolean

## Summary

Property decorator that transforms the string environment variable value `"true"` or `"false"` into a native `boolean`.

## Signature

```typescript theme={null}
TransformToBoolean: () => PropertyDecorator
```

## Parameters

*No parameters.*

## Returns

**Type**:`PropertyDecorator`

Property decorator that transforms the string environment variable value or into a native .

## Remarks

Returns `undefined` for any value that is neither `"true"` nor `"false"`. Pair with `@IsBoolean()` and `@Default(false)` for a fully validated and defaulted boolean config property.

## Examples

### Example 1

```typescript theme={null}
```