[Home](./index.md) > [puppeteer](./puppeteer.md) > [Page](./puppeteer.page.md) > [evaluate](./puppeteer.page.evaluate.md)
## Page.evaluate() method
Signature:
```typescript
evaluate(pageFunction: T, ...args: SerializableOrJSHandle[]): Promise>>;
```
## Parameters
| Parameter | Type | Description |
| --- | --- | --- |
| pageFunction | T | a function that is run within the page |
| args | [SerializableOrJSHandle](./puppeteer.serializableorjshandle.md)\[\] | arguments to be passed to the pageFunction |
Returns:
Promise<[UnwrapPromiseLike](./puppeteer.unwrappromiselike.md)<[EvaluateFnReturnType](./puppeteer.evaluatefnreturntype.md)<T>>>
the return value of `pageFunction`.
## Remarks
Evaluates a function in the page's context and returns the result.
If the function passed to `page.evaluteHandle` returns a Promise, the function will wait for the promise to resolve and return its value.
## Example 1
```js
const result = await frame.evaluate(() => {
return Promise.resolve(8 * 7);
});
console.log(result); // prints "56"
```
You can pass a string instead of a function (although functions are recommended as they are easier to debug and use with TypeScript):
## Example 2
```
const aHandle = await page.evaluate('1 + 2');
```
To get the best TypeScript experience, you should pass in as the generic the type of `pageFunction`:
```
const aHandle = await page.evaluate<() => number>(() => 2);
```
## Example 3
[ElementHandle](./puppeteer.elementhandle.md) instances (including [JSHandle](./puppeteer.jshandle.md)s) can be passed as arguments to the `pageFunction`:
```
const bodyHandle = await page.$('body');
const html = await page.evaluate(body => body.innerHTML, bodyHandle);
await bodyHandle.dispose();
```