puppeteer/website/versioned_docs/version-21.1.1/api/puppeteer.predicate.md

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---
sidebar_label: Predicate
---
# Predicate type
#### Signature:
```typescript
export type Predicate<From, To extends From = From> =
| ((value: From) => value is To)
| ((value: From) => Awaitable<boolean>);
```
**References:** [Awaitable](./puppeteer.awaitable.md)