JSFiddle - React, Tailwind, and code Playground
HTML
<div id='output'></div>
JavaScript
function roundPenny(pendantCost){
var str = pendantCost;
var originalSplit = str.split('.');
// Round 'originalSplit[1]' to two decimals
var result = Math.round(originalSplit[1]*100)/100
return result;
// Test it
pendantCost = roundPenny(5.555);
$('#output').html(pendantCost);