JSFiddle - React, Tailwind, and code Playground

JavaScript

let array = [
  {conditionalFrom: 0, conditionalTo: 10000, computationFrom: 0, computationTo: 1000},
    {conditionalFrom: 10001, conditionalTo: 10000000, computationFrom: 1001, computationTo: 100000},
    {conditionalFrom: 10001, conditionalTo: 999999999999, computationFrom: 0, computationTo: 1000}
];

array.sort((a, b) => {
    let ret = a.conditionalTo - b.conditionalTo;
    if (ret !== 0)
        return ret;
    return a.conditionalFrom - b.conditionalFrom;
});

console.log(array);