JSFiddle - React, Tailwind, and code Playground

HTML

<select onchange="getval(this);">
    <option value="option 1">option 1</option>
    <option value="option 2">option 2</option>
    
	<option class="selectOption" value="option 3">option 3</option>
	<option class="selectOption" value="option 4">option 4</option>
</select>
<input type='text' title='Tags' id='tags' value="option 1" />

<script type="text/javascript">
    function getval(sel) {
          alert(sel.value)        ;
    var a=sel.value;
    $("#tags").val(a);
    }
</script>