JSFiddle - React, Tailwind, and code Playground

HTML

<div class="gui-radio">
    <input type="radio" value="register" name="choise" id="new-register" />
    <label for="register">Register</label>
</div>
<div class="gui-radio">
    <input type="radio" checked="checked" value="guest" name="choise" id="new-guest" />
    <label for="new-guest">Guest</label>
</div>

JavaScript

jQuery('input#new-register').prop('checked', true);