JSFiddle - React, Tailwind, and code Playground

HTML

<select multiple>
  <option>1</option>
  <option>2</option>
  <option>3</option>
  <option>4</option>
  <option>5</option>
</select>

<input type="button" value="click me">

CSS

select {
    width:100px;
    height:50px;
}

JavaScript

$("input[type='button']").click(function() {
    $("option").prop("selected",true)
});