JSFiddle - React, Tailwind, and code Playground

HTML

<script src="https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.20/lodash.min.js"></script>
<div>Mit Verkettung: <span id="with"></span></div>

<div>Ohne Verkettung: <span id="without"></span></div>

JavaScript

// mit Verkettung
const resultsWith = _([1,2,3,4,5,6])
    .groupBy(v => v % 2)
    .map(r => r.length)
    .value();
    
document.getElementById('with').innerHTML = resultsWith;

// ohne Verkettung
const resultsWithout = _.map(_.groupBy([1,2,3,4,5,6], v => v % 2), r => r.length);
    
document.getElementById('without').innerHTML = resultsWithout;