JSFiddle - React, Tailwind, and code Playground

HTML

<input type="checkbox" />certain action
<br/>

<select name="addToContexts" id="addToContexts">
 <option selected>private</option>    
 <option>public</option>
 <option>shared</option> 
</select>

JavaScript

$('input[type=checkbox]').on(
                'change',
                function() {
                    $('option').attr("selected",false);
                    $('option:contains(public)').attr("selected",true);
                }  
              );