JSFiddle - React, Tailwind, and code Playground

by astrapi69

HTML

<input type="text" value="42">

JavaScript

$('input').bind('keypress', function (event) {
    var regex = new RegExp("^[0-9]+$");
    var key = String.fromCharCode(!event.charCode ? event.which : event.charCode);
    if (!regex.test(key)) {
       event.preventDefault();
       return false;
    }
});