test-case.js

const { Chromeless } = require('chromeless');

const log = function(arg) { console.log(arg) }

async function run() {
    const chromeless = new Chromeless()

    const links = await chromeless
        .goto('https://www.npmjs.com')
        .type('chromeless', 'input[name="q"]')
        .press(13)
        .wait('body')
        .evaluate(() => {
            // this will be executed in headless chrome
            const links = [].map.call(
                document.querySelectorAll('.search-results li'),
                item => {
                    const { innerText: title, href } = item.querySelector('a.packageName');
                    return { title, href };
                }
            )
            return JSON.stringify(links)
        })
    
    console.log(links)
    
    await chromeless.end()
}

run().catch(console.error.bind(console))