# FlagdResource.withBindFileSync

- Module: [CommunityToolkit.Aspire.Hosting.Flagd](/reference/api/typescript/communitytoolkit.aspire.hosting.flagd.md)
- Defined on: [FlagdResource](/reference/api/typescript/communitytoolkit.aspire.hosting.flagd/flagdresource.md)
- Version: `13.4.0`
- Kind: `method`

Configures flagd to use a bind mount as the source of flags.

## Definition

```typescript
interface FlagdResource {
  // ... omitted for brevity
  withBindFileSync(
      fileSource: string,
      filename?: string): FlagdResource;
}
```

## Signature

```typescript
withBindFileSync(
    fileSource: string,
    filename?: string): FlagdResource
```

## Parameters

- `fileSource` (`string`)
- `filename` (`string`) `optional` `= flagd.json`

## Returns

[FlagdResource](/reference/api/typescript/communitytoolkit.aspire.hosting.flagd/flagdresource.md) `builder`

## Defined on

- [FlagdResource](/reference/api/typescript/communitytoolkit.aspire.hosting.flagd/flagdresource.md) -- `handle`