JSFiddle - React, Tailwind, and code Playground
HTML
<select>
<option>A</option>
<option>B</option>
</select>
<input type="checkbox">Lock
CSS
select:disabled{
background: lightblue;
}
JavaScript
$('input[type="checkbox"]').click(function() {
$('select').prop('disabled', $(this).prop('checked'));
})