JSFiddle - React, Tailwind, and code Playground

by Blu Angel

HTML

<script>
    function getDateAhead()
    {
        var str = document.getElementById('fromDate').value;
        var res = str.split("-");
    var year = parseInt(res[0])+1;    
    var month = parseInt(res[1])-1;
        if (month <= 9 && month > 0 )
        {
            month = "0"+month;
        }
        else if (month == 0)
        {
            month = "12";  
            year = year - 1;
        }
        var newdate = year+"-"+month;
        console.log(str);
        console.log(newdate);
        document.getElementById('toDate').value = newdate;
    }
</script>


<input type="month" id="fromDate" onChange="getDateAhead()"/>
<input type="month" id="toDate"/>