JSFiddle - React, Tailwind, and code Playground

HTML

<input type="text" id="nbr" />

JavaScript

$('#nbr').on('keypress', function(ev) {
    var keyCode = window.event ? ev.keyCode : ev.which;
    //codes for 0-9
    if (keyCode < 48 || keyCode > 57) {
        //codes for backspace, delete, enter
        if (keyCode != 0 && keyCode != 8 && keyCode != 13 && !ev.ctrlKey) {
            ev.preventDefault();
        }
    }
});