JSFiddle - React, Tailwind, and code Playground

HTML

<div id="asd">
  <input type="checkbox" checked value="z">check 1</input>
  <input type="checkbox" checked value="y">check 2</input>
  <input type="checkbox" value="x">check 3</input>
</div>

JavaScript

var selValues = {};
selValues['234'] = $('#asd').val();
selValues['343'] = function() {
    var el = '';
    $('#asd input[@type=checkbox]:checked').each(function() {
        el += $(this).val() + "|";
    });
    return el;
};
var f = selValues['343'];
var x = f();
alert(x);