JSFiddle - React, Tailwind, and code Playground

HTML

<input type="radio" name="rating" value="1" id="green" /> <label for="green">Positive</label><br />
<input type="radio" name="rating" value="0" id="red" /> <label for="red">Negative</label>

<textarea style="width: 95%;" rows="6" name="feedback" disabled></textarea>

JavaScript

$('input[name="rating"]').on('change', function() {
    $('textarea[name="feedback"]').attr('disabled', false).focus();
});