JSFiddle - React, Tailwind, and code Playground

HTML

Hour:
<input type="number" class="hour" min="1" name="hour" />Minutes:
<input type="number" class="minutes" min="1" name="minutes" />

JavaScript

$(document).ready(function () {
        $('.minutes').change(function () {
            if ($('.minutes').val() > 59) {
                //Math.floor($('.hour').val() )= $(this).val() + 1;
                debugger;
                var min = $('.minutes').val();
                var hr = Math.floor(min / 60);
                var hrTemp = Math.floor($('.hour').val());
                var remMin = min % 60;
                $('.hour').val(hr + hrTemp);
                $('.minutes').val(remMin);
            }

        });
    });