const _ = (selector, el) => Array.from((el || document).querySelectorAll(selector));

// Example: Run on http://www.nu.nl for extracting all news headers
_('.info').map(x => _('.title', x).map(y => y.innerText)[0])

Another example:

https://nl.wikipedia.org/wiki/Lijst_van_vlaggen_van_de_wereld

_('.wikitable td').map(e => ([
    _('a', e).slice(-1).map(e => e.innerText).pop(),
    _('a.image img', e).map(e => e.src).pop()
]))

320000cookie-checkSimple JQuery like selectorno