qsa('option', qs(e.target.getAttribute('list')))

function qs(query, context) {
   return (context ? context : document).querySelector(query);
}

function qsa(query, context) {
   return (context ? context : document).querySelectorAll(query);
}

function $(el, context)
{
    var result = document.querySelectorAll(el, context || document);

    return result.length == 1 ? result[0] : result;
}

function Events(nodeList) {
    this.nodeList = nodeList;
};

Event.prototype.addEventListener = (event, callback, boolean) => {
    [].forEach.call(this.nodeList, (el) => el.addEventListener(event, callback, boolean));
};

function $(el, context)
{
    var result = document.querySelectorAll(el, context || document);

      return new Events(result);
}

$('button').addEventListener('click', function () {

});

   qsa('element').prop('innerText', value);

jot.element('ul > li').prop('innerText', function (text) {
     return i + 'º  '+ text;
});

carregarDados() // cahama a função, mas esquece de colocar o ";"

(function () {
   /// faz alguma coisa aqui
})();

(function (window) {


    var forEach = Array.prototype.forEach;

    var Element = function (nodeList) {
        this.nodeList = nodeList;
    };

    var proto = Element.prototype;

    proto.on = function on(event, callback) {
        return this.apply(function (el) {
            el.addEventListener(event, callback, false);
        });
    };

    proto.off = function off(event, callback) {
        return this.apply(function (el) {
            callback ? el.removeEventListener(event, callback) : el.removeEventListener(event);

 [undefined, null, false].indexOf(value) >= 0

jot.element = function (el) {
    return new JotEvent(this.qsa(el));
}

 jot.element('body').get(0)

this.nodeList = querySelector('body');

find = function (el_find) {
   this.apply(function (el) {
        // aqui eu teria que arrumar de agregar
        return el.find(el_find);
   });
}

// Então o correto seria eu utilizar:

private static readonly string _nameofUpdateInfo = nameof(UpdateInformationController.UpdateInfo);

// Ao invés de:

private const string NameofUpdateInfo = nameof(UpdateInformationController.UpdateInfo);