JSFiddle - React, Tailwind, and code Playground

HTML

<form id="test">
    <input type="text" name="one" />
</form>
<a id="add" href="#" />add input</a>

JavaScript

$('body').on('keyup', 'input', function() {
    newval = $(this).val().replace(/[^0-9.]/g, "");
    $(this).val(newval);
});

$('#add').on('click', function(e) {
    e.preventDefault();
    $('#test').append('<input type="text" />');
});