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Documentation

evaluate(pageFunction[, arg])

Open source

evaluate(pageFunction[, arg])

Returns the value of the pageFunction invocation. It passes this handle as the first argument to the pageFunction.

Parameter	Type	Defaults	Description
pageFunction	function or string		Function to be evaluated.
arg	string	`''`	Optional argument to pass to `pageFunction`.

Returns

Type	Description
Promise	The return value of `pageFunction`.

Example

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();
  }
}