fill(value, [options])

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');
  const textbox = page.locator("#text1");
  textbox.fill('hello world!');
}