# ReferenceExpression.getValueAsync

- Module: [Aspire.Hosting](/reference/api/typescript/aspire.hosting.md)
- Defined on: [ReferenceExpression](/reference/api/typescript/aspire.hosting/referenceexpression.md)
- Version: `13.4.0`
- Kind: `method`

Gets the value of the expression. The final string value after evaluating the format string and its parameters.

## Definition

```typescript
interface ReferenceExpression {
  // ... omitted for brevity
  getValueAsync(cancellationToken: cancellationToken): string;
}
```

## Signature

```typescript
getValueAsync(cancellationToken: cancellationToken): string
```

## Parameters

- `cancellationToken` (`cancellationToken`)

## Returns

`string`

## Defined on

- [ReferenceExpression](/reference/api/typescript/aspire.hosting/referenceexpression.md) -- `handle`