JSFiddle - React, Tailwind, and code Playground
HTML
<form>
<select name="box1">
<option value="1">1</option>
<option value="2">2 </option>
<option value="3">3</option>
</select>
<select name="box2">
<option value="a">a</option>
<option value="b">b </option>
<option value="c">c</option>
</select>
<input type="submit">
</form>
JavaScript
$('form').submit(function(){
alert($(this).serialize());
link = "http://link.to/my/website";
alert(link+"?"+$(this).serialize());
return false;
});