JSFiddle - React, Tailwind, and code Playground

JavaScript

var severity = function (key, value, order) {
    this.key = key;
    this.value = value;
    this.order = order;
};

function getHighest(array) {
    var max = {};
    for (var i = 0; i < array.length; i++) {
        if (array[i].order > (max.order || 0))
            max = array[i];
    }
    return max;
}

var array = [
    new severity("", "Second", 2),
    new severity("", "First", 1),
    new severity("", "Fourth", 4),
    new severity("", "Third", 3)
];

var highest = getHighest(array);

alert(highest.value);