JSFiddle - React, Tailwind, and code Playground

JavaScript

var array = [5, 547, 5, 363];

for ( var x = 0, len = array.length; x < len; x++ )
{
    var o = document.createElement('input');
    
    o.setAttribute('type', 'checkbox');
    o.setAttribute('id', 'checkbox' + x );
    
    document.body.appendChild(o);

 
}

document.body.addEventListener('click', function( e ) {
    alert(e.target.id);
});