JSFiddle - React, Tailwind, and code Playground

HTML

<select>
    <option>0</option>
</select>

JavaScript

$(function(){
    $("select").focus(function(){
        var $this = $(this);
        setTimeout(function(){
        
        if ($this.find("option").length<2){
            for (i=1; i<5; i++){
                $this.append("<option>Item " + i  + "</option>");
            }
        }
            
        }, 50);
    });        
});