JSFiddle - React, Tailwind, and code Playground

by fbfcn

JavaScript

value = '1-3,5,9-7'

var values = value.match(/(\d*-\d*)/g);
            $.each(values, function () {
                var val = this;
                var match2 = val.match(/([0-9]+,?)/g);
                if (parseInt(match2[0]) > parseInt(match2[1])) {
                     alert(false);
                }

            });