JSFiddle - React, Tailwind, and code Playground

HTML

<select id="selectNumber">
  <option>Choose a number</option>
</select>
<select id="selectNumber2">
  <option>Choose a number</option>
</select>

JavaScript

var select = document.getElementById("selectNumber");
var select2 = document.getElementById("selectNumber2"); 
var options = ["1", "2", "3", "4", "5"];
for(var i = 0; i < options.length; i++) {
    var opt = options[i];
    select.add(new Option(opt,opt));
    select2.add(new Option(opt,opt));    
}