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This is documentation for the next version of K6. For the latest stable release, go to the latest version.

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evaluate(pageFunction[, arg])

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

ParameterTypeDefaultsDescription
pageFunctionfunction or stringFunction to be evaluated.
argstring''Optional argument to pass to pageFunction.

Returns

TypeDescription
PromiseThe 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();
  }
}