puppeteer/new-docs/puppeteer.evaluatefn.md
Jack Franklin 46fc6ca41a
feat(types): improve typing of .evaluate() (#6096)
* feat(types): improve typing of `.evaluate()`

This is the start of the work to take the types from the
`@types/puppeteer` repository and port them into our repo so we can ship
our built-in types out the box.

This change types the `evaluate` function properly. It takes a generic
type which is the type of the function you're passing, and the arguments
and the return that you get back from the `evaluate` call are typed
correctly.
2020-06-25 13:38:01 +01:00

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[Home](./index.md) &gt; [puppeteer](./puppeteer.md) &gt; [EvaluateFn](./puppeteer.evaluatefn.md)
## EvaluateFn type
<b>Signature:</b>
```typescript
export declare type EvaluateFn<T = any> = string | ((arg1: T, ...args: any[]) => any);
```