JSFiddle - React, Tailwind, and code Playground

HTML

<input id="numeric"/>

JavaScript

$("#numeric").blur(function(){
    var input = $("#numeric");
    var val = input.val();
    if (!valid(val))
        input.val("");
    
});
function valid(val) {
    var reg = new RegExp('^[0-9]{1,5}(,[0-9]{1,5})?$');
    if (!reg.test(val))
        return false;
    return true;
}