JSFiddle - React, Tailwind, and code Playground

HTML

<input type="text" value="9" id="someid"/>

JavaScript

$(document).ready(function(){
    var some_id_value=$("#someid").val();
    if (some_id_value.length==1){
        some_id_value="0"+some_id_value;
    };
    $("#someid").val(some_id_value);
    some_id_value=parseInt(some_id_value);
    alert(some_id_value);
});