JSFiddle - React, Tailwind, and code Playground

by wwt

HTML

<input type="radio" name="a" id="a1" value="1">1
<input type="radio" name="a" id="a2" value="2">2
<input type="radio" name="a" id="a3" value="3">3
<div class="out"></div>

JavaScript

$(':radio').on('change', function(){
  var el = $(this);
  $('.out').text(el.val());
  alert('выбран '+el.attr('id'));
});

setTimeout(function(){
	$('#a2').trigger('click');
}, 3000);