JSFiddle - React, Tailwind, and code Playground

by redler

HTML

<textarea id="foo"></textarea>
<input id="bar" value="" />

JavaScript

function textCounter( field, countfield, limit ){
   field.value = field.value.substring(0,limit); 
   countfield.val( limit-field.value.length );
}

$('#foo').keypress( function(){
   textCounter(this, $('#bar'), 240 );
});