setBaseUrl( url )

import { Httpx } from 'https://jslib.k6.io/httpx/0.1.0/index.js';

const session = new Httpx();

session.setBaseUrl('https://test-api.k6.io');

export default function () {
  session.get('/public/crocodiles/1/'); // baseUrl doesn't need to be repeated on every request
}