JSFiddle - React, Tailwind, and code Playground
HTML
<div class="selctprop">
<select id="sel1">
<option>
1
</option>
<option>
2
</option>
<option>
3
</option>
</select>
</div>
<input type="text" id="input1"/>
<button type="button" id="btn1">Add a list</button>
JavaScript
$('#btn1').click(function(){
var inputdiv =$('#input1').val();
$('#sel1').append('<option>' + inputdiv + '</option>');
$('#sel1').val(inputdiv);
})