JSFiddle - React, Tailwind, and code Playground

CSS

.hournum{
    text-decoration: none;
    color: black;
    width: 40px;
    float: left;
    padding: 0px 5px;
    text-align: center;
    color: red;
    border-radius: 3px;
    border: 1px solid black;
    margin: 2px 2px;
 }

.container{
    position: absolute;
    top: 10px;
    left: 10px;
    width: 280px;
    background-color: white;
    border: 1px solid #6699FF;
    padding: 2px;
}

JavaScript

var str = "";

for(var i=1 ; i<=12; i++){
    var cc = i;
    var row
    
    if(i <= 9) cc = "0" + i
    
    str += '<a href="#" id="time_'+cc+'" class="hournum">'+cc+"</a>";
 }

document.body.innerHTML = '<div class="container">'+str+"</div>";