This method changes the CSS @media type through the media argument, and/or the 'prefers-colors-scheme' media feature, using the colorScheme argument.
import { chromium } from 'k6/experimental/browser'; export default async function () { const browser = chromium.launch(); const page = browser.newPage(); await page.goto('https://test.k6.io/browser.php'); console.log(page.evaluate(() => matchMedia('screen').matches)); // true}