JSFiddle - React, Tailwind, and code Playground

HTML

<input type="text" id="txt" maxlength="10" onblur="checklength(event);" onpaste="pasted(this)">

JavaScript

function checklength(e)
{
    alert('blurry ' + document.getElementById('txt').value.length);
    e.cancelBubble=true;
}

function pasted(element) {
    setTimeout(function(){
        alert(element.value.length);
    }, 0); //or 4
}