JSFiddle - React, Tailwind, and code Playground

HTML

<select id="choose">
  <option value=1>A</option>
  <option value=2>B</option>
  <option value=3>C</option>
</select>

<div id="hide-me">hide me!</div>

JavaScript

$('#choose').on('change', function () {
    if (this.value === "2") {
        $("#hide-me").hide();
    } else {
        $("#hide-me").show();
    }
});