// one way
const $ = document.querySelector.bind(document);
const $$ = document.querySelectorAll.bind(document);


// second way
let $ = (selector) => document.querySelector(selector);
let $$ = (selector) => document.querySelectorAll(selector);

$('div').style.color = 'blue'
$$('div').forEach(div => div.style.background = 'orange')