JSFiddle - React, Tailwind, and code Playground

JavaScript

var createComboBox = function()
{
    var select = document.createElement("select"),
        year = new Date().getFullYear();
    
    for(var i = 0; i < 6; i++)
    {  
        var option = document.createElement("option");
        select.appendChild(option).text = year;
        select.appendChild(option).value = year;
        year += -1
    }
    
    document.body.appendChild(select);
}

createComboBox();