JSFiddle - React, Tailwind, and code Playground

HTML

<input type="text" id="txt1" value="" />
<input type="button" value="click me" id="btn1" onclick="addyear()" />

JavaScript

$("#btn1").bind("click", function () {
    var strDate = document.getElementById('txt1').value
    var array = strDate.split('-');
    var newDate = (parseInt(array[0]) + 1) + "-" + array[1] + "-" + array[2];    
    document.getElementById('txt1').value=newDate;
});