jQuery-example.js

function $(selector) {
  const el = document.querySelector(selector);
  return ({
    html: () => el,
    hide: () => el.hidden = true,
    show: () => el.hidden = false,
    on: (event, callback) => el.addEventListener(event, callback),
    attr: (name, value) => value ? el.setAttribute(name, value) : el.getAttribute(name),
  });
}