JSFiddle - React, Tailwind, and code Playground

HTML

<form>
<textarea id="send-txt" rows="2" cols="20">

</textarea>
</form>

JavaScript

$(document).ready( function() {        
        var maxLen = 10;
        
        $('#send-txt').keypress(function(event){
            var Length = $("#send-txt").val().length;
            var AmountLeft = maxLen - Length;
            $('#txt-length-left').html(AmountLeft);
            if(Length >= maxLen){
                if (event.which != 8) {
                    return false;
                }
            }
        });

});