# core/registries/formatter.registry.ts

> 13 lines of code and 3 definitions.

Tree: GovLab Quality
Language: typescript
Layer: infrastructure
Canonical: https://banes-lab.com/anatomy/quality#file-quality-core-registries-formatter-registry-ts
Source text: https://banes-lab.com/source/quality/core/registries/formatter.registry.ts.txt

Listed in [core/registries](https://banes-lab.com/api/source/quality/core/registries.md), before [core/registries/producer.registry.ts](https://banes-lab.com/source/quality/core/registries/producer.registry.ts.md).

## Definitions

- `defineFormatter` (lexical_declaration, line 6, exported)
- `FORMATTERS` (lexical_declaration, line 4)
- `formatterFor` (lexical_declaration, line 14, exported)

## Contained in

- [core/registries](https://banes-lab.com/anatomy/quality/folder-quality-core-registries.md)

## Uses

- [configuration/strings/emitter.strings.ts](https://banes-lab.com/source/quality/configuration/strings/emitter.strings.ts.md)

## Linked from

- [configuration/strings](https://banes-lab.com/anatomy/quality/folder-quality-configuration-strings.md)

## Source

```typescript
import type { ConfigFormatter, EmitFormat } from "#types/emitter.types";
import { duplicateFormatter } from "#configuration/strings/emitter.strings";

const FORMATTERS = new Map<EmitFormat, ConfigFormatter>();

export const defineFormatter = function defineFormatter(formatter: ConfigFormatter): ConfigFormatter {
    if (FORMATTERS.has(formatter.format)) {
        throw new Error(duplicateFormatter(formatter.format));
    }
    FORMATTERS.set(formatter.format, formatter);
    return formatter;
};

export const formatterFor = function formatterFor(format: EmitFormat): ConfigFormatter | undefined {
    return FORMATTERS.get(format);
};
```