JSFiddle - React, Tailwind, and code Playground

JavaScript

var obj = [{
    key: 'First',
    value: 100,
    order: 100},
{
    key: 'Second',
    value: 2,
    order: 2},
{
    key: 'Third',
    value: 300,
    order: 300}]




function sortObj(a, b){
    return a.order < b.order ? 0 : 1;
}
obj.sort(sortObj)   
var highest =obj.pop();


$('body').append('Highest is ' + highest.key+', order=' + highest.order  )