---
title: "evaluate(pageFunction[, arg]) | Grafana k6 documentation"
description: "Browser module: JSHandle.evaluate(pageFunction[, arg]) method"
---

> For a curated documentation index, see [llms.txt](/llms.txt). For the complete documentation index, see [llms-full.txt](/llms-full.txt).

# evaluate(pageFunction\[, arg])

Executes JavaScript code in the page, passing this handle as the first argument to the `pageFunction` and `arg` as the following arguments. It returns the value of the `pageFunction` invocation.

Expand table

| Parameter    | Type               | Defaults | Description                                   |
|--------------|--------------------|----------|-----------------------------------------------|
| pageFunction | function or string |          | Function to be evaluated in the page context. |
| arg          | string             | `''`     | Optional argument to pass to `pageFunction`.  |

### Returns

Expand table

| Type    | Description                         |
|---------|-------------------------------------|
| Promise | The return value of `pageFunction`. |

### Example

JavaScript ![Copy code to clipboard](/media/images/icons/icon-copy-small-2.svg) Copy

```javascript
import { browser } from 'k6/browser';

export const options = {
  scenarios: {
    browser: {
      executor: 'shared-iterations',
      options: {
        browser: {
          type: 'chromium',
        },
      },
    },
  },
};

export default async function () {
  const page = await browser.newPage();

  try {
    await page.goto('https://test.k6.io/browser.php');
    const jsHandle = await page.evaluateHandle(() => document.body);

    const innerHTML = await jsHandle.evaluate((node) => node.innerHTML);
    console.log(innerHTML); // <p><a href="/">&lt; Back</a></p>...
  } finally {
    await page.close();
  }
}
```