JSFiddle - React, Tailwind, and code Playground

HTML

<div id="main">
 <form>
<div id="week_day_time" class="shown">

<input type="radio" name="week_day_time" value="week" />Week<br />
<input type="radio" name="week_day_time" value="day" />Day<br />
<input type="radio" name="week_day_time" value="time" />Time

</div>
<div id="week">
more form for week.
originally hidden by css. But it will open when you select a week radio button.
more form for week
</div>
<div id="day">
more form...
originally hidden by css. But it will open when you select a day radio button.
more form for day
</div>
<div id="time">
more form...
originally hidden by css. But it will open when you select a time radio button.
more form for time
</div>
</form> 
</div>

CSS

#week, #day, #time {
    display: none;
}
div.shown { 
    display:block; 
}

JavaScript

var current = '';
$('[name="week_day_time"]').change(function() {
    if(current.length) 
        $('#' + current).slideUp();
    current = $(this).val();
    $('#' + $(this).val()).slideDown();
});