JSFiddle - React, Tailwind, and code Playground

HTML

<input id="mhm" value="1"/>
<button>go</button>

JavaScript

$("button").click(function(){
    
    var v = $("#mhm").val();
    
    $("#mhm").val(add(v));
    
});

function add(value) {
    return value.length < 3 ? add("0"+value) : value
}