JSFiddle - React, Tailwind, and code Playground

HTML

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div class="select">
<input class="myinput" type="text">
<input class="myinput" type="text">
<input class="myinput" type="text">
<input class="myinput" type="text">
<input class="myinput" type="text">
<input class="myinput" type="text">
<input class="myinput" type="text">
<input class="myinput" type="text">
</div>
<div class="val"></div>

JavaScript

$('.select').keyup(function () { 
 var len = 0;
 
  $('.myinput').each(function() {
  
len += $(this).val().length;

});

    $('.val').text(len + ' character');
});