JSFiddle - React, Tailwind, and code Playground

HTML

<select>
<option value="" selected="selected"></option>
<option value="form_1">Form 1</option>
<option value="form_2">Form 2</option>
<option value="form_3">Form 3</option>
</select>

<form name="form_1" id="form_1" style="display:none">
<input type="text" value="1">
</form>

<form name="form_2" id="form_2" style="display:none">
<input type="text" value="2">
</form>

<form name="form_3" id="form_3" style="display:none">
<input type="text" value="3">
</form>

JavaScript

$("select").on("change", function() {    
    $("#" + $(this).val()).show().siblings().hide();
});