JSFiddle - React, Tailwind, and code Playground

HTML

<select id="mySelect">
<option value="1">First</option>
<option value="2">Second</option>
<option value="3">Third</option>
</select>

<div id="results-1"> lorem ipsum </div>
<div id="results-2"> lorem ipsum 2</div>
<div id="results-3"> lorem ipsum 3</div>

JavaScript

$("#results-1").hide();
$("#results-2").hide();
$("#results-3").hide();

$("#mySelect").change(function() {

    //optionally, if you want previously selected ones to be hidden
    $("[id^=results-]").hide();

    $("#results-" + $(this).val()).show();
}).change();