JSFiddle - React, Tailwind, and code Playground

HTML

<select id="selectId">
    <option value="0">Default Value</option>
    <option value="1">1</option>
    <option value="2">2</option>
</select>
<input type="button" id="buttonID" value="change"/>

JavaScript

$('#buttonID').click(function(){
    $('#selectId').val('0'); //value of your default option
});