JSFiddle - React, Tailwind, and code Playground

HTML

<select name="select-choice-min" id="mainMenu" data-mini="true">
      <option value="10">10</option>
      <option value="11">11</option>
      
 </select>

JavaScript

var arr = new Array();
$('#mainMenu option').each(function(){
arr.push($(this).val());
});
console.log(arr)