JSFiddle - React, Tailwind, and code Playground

by rustyjeans

HTML

<input name="numInput" type="text" value="1" />

JavaScript

$(function () {
        $('input[name=numInput]').keydown(function (e) {
            var curValue = parseInt($(selector).val());
            if (typeof(curValue) == 'number') {
                alert(e.keyCode);
                if (e.keyCode == 38) {
                    $(selector).val(++curValue);
                } else if (e.keyCode == 40) {
                    $(selector).val(--curValue);
                }
            }
        });
    });