JSFiddle - React, Tailwind, and code Playground

HTML

<select onChange="pageSwitch(this)">
    <option value="page1.html">Страница 1</option>
    <option value="page2.html">Страница 2</option>
    <option value="page3.html">Страница 3</option>
</select>

<script>

function pageSwitch(s){
	alert(s.value);
}

</script>