JSFiddle - React, Tailwind, and code Playground

HTML

<input type="text" id="inputStr" />
<div id="result"></div>

JavaScript

String.prototype.pad = function(char, len){
    var chars = this.split();
    var initialLen = len - this.length;
    for(var i = 0; i < initialLen; i++){
        chars.unshift(char);
    }
    
    return chars.join('');
};

$(function() {
    $('#inputStr').keyup(function() {
        // function show_prompt(){
        var name = $(this).val();
        var res = new Array();
        for (var i = 0; i < name.length; i++) {
            var strCode = (name.charCodeAt(i) - 96).toString();
            res.push(strCode.pad('0', 2));
        }

        $('#result').html(res.join(''));
    });
});