JSFiddle - React, Tailwind, and code Playground

HTML

<input type="text" id="number" value="1000"/>

JavaScript

$('#number').keypress(function (event) {
    if (event.which <= 46 || event.which > 59) {
        event.preventDefault();
    }
});
$('#number').bind('blur', function (e) {
    if ($(this).val().length > 0) $(this).val(parseFloat($(this).val()).toFixed(2));

});