JSFiddle - React, Tailwind, and code Playground

by zlojnaxa

HTML

<p>Date:
    <input id="txtDate" type="text" />
</p>
<p>
    <input type="button" value="Fill Follow Date" />
</p>
<p>Follow Date:
    <input id="follow_Date" type="text" />
</p>
<script>
window.addEventListener('load',()=>
    document.querySelector('#txtDate').addEventListener('keyup',()=>
        getdate()
    ,false)
,false);
 
function getdate() {
    var tt = document.getElementById('txtDate').value;
 
    var date = new Date(tt);
    var newdate = new Date(date);
 
    newdate.setDate(newdate.getDate() + 3);
    
    var dd = newdate.getDate();
    var mm = newdate.getMonth() + 1;
    var y = newdate.getFullYear();
 
    var someFormattedDate = mm + '/' + dd + '/' + y;
    document.getElementById('follow_Date').value = someFormattedDate;
}
</script>