# slice

Extract a section of the current state of a RefString.

## Signatures

```ts
export declare const slice: {
    (start?: number, end?: number): <E, R>(ref: RefString<E, R>) => RefSubject.Computed<string, E, R>;
    <E, R>(ref: RefString<E, R>, start?: number, end?: number): RefSubject.Computed<string, E, R>;
};
```

## Why

Extract a section of the current state of a RefString. The operation remains attached to the
RefSubject's versioned state boundary.

## Ownership and lifetime

The slice view retains no independent state. An Effect read samples the source once; Fx
observation follows later pushes and its observing Scope owns subscription cleanup.