[API reference](https://evolu.dev/docs/api-reference) › [@evolu/common](https://evolu.dev/docs/api-reference/common) › [Schedule](https://evolu.dev/docs/api-reference/common/Schedule) › whileScheduleOutput

```ts
function whileScheduleOutput<Output>(
  predicate: Predicate<Output>,
): <Input>(schedule: Schedule<Output, Input>) => Schedule<Output, Input>;
```

Defined in: [packages/common/src/Schedule.ts:873](https://github.com/evoluhq/evolu/blob/e7144e2bbe9069362b62dec1b64a8aa922b8f1b0/packages/common/src/Schedule.ts#L873)

Continues while the output satisfies a predicate.

Stops (returns `Err(Done<void>)`) when [Predicate](https://evolu.dev/docs/api-reference/common/Types/type-aliases/Predicate) returns `false`.

### Example

```ts
// Continue while delay is under 5 seconds
const capped = whileScheduleOutput((delay: Millis) => delay < 5000)(
  exponential("1s"),
);
```