[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) › collectUntilScheduleOutput

```ts
function collectUntilScheduleOutput<Output>(
  predicate: Predicate<Output>,
): <Input>(
  schedule: Schedule<Output, Input>,
) => Schedule<readonly Output[], Input>;
```

Defined in: [packages/common/src/Schedule.ts:1762](https://github.com/evoluhq/evolu/blob/037c390af081e9944d616ff298a729515c5c5ab7/packages/common/src/Schedule.ts#L1762)

Collects outputs until a predicate becomes true.

Mirror of [collectWhileScheduleOutput](https://evolu.dev/docs/api-reference/common/Schedule/functions/collectWhileScheduleOutput) — stops collecting when the
predicate returns true.

### Collecting until output matches

```ts
import {
  assertErr,
  assertOk,
  collectUntilScheduleOutput,
  done,
  exponential,
  testCreateDeps,
  type Millis,
} from "@evolu/common";

// Collect delays until the next delay reaches at least one second.
const untilLarge = collectUntilScheduleOutput((delay: Millis) => delay >= 1000)(
  exponential("100ms"),
);
const step = untilLarge(testCreateDeps());
step(undefined);
step(undefined);
step(undefined);
assertOk(step(undefined), [[100, 200, 400, 800], 800]);
assertErr(step(undefined), done());
```