jQuery addClass example

Change class name on click in jQuery

by Dmitri Ganenco

HTML

<select id='sel'>
  <option value=''></option>
  <option value='1'>1</option>
  <option value='2'>2</option>
  <option value='3'>3</option>
</select>

CSS

body {
  background: #20262E;
  padding: 20px;
  font-family: Helvetica;
}

#banner-message {
  background: #fff;
  border-radius: 4px;
  padding: 20px;
  font-size: 25px;
  text-align: center;
  transition: all 0.2s;
  margin: 0 auto;
  width: 300px;
}

button {
  background: #0084ff;
  border: none;
  border-radius: 5px;
  padding: 8px 14px;
  font-size: 15px;
  color: #fff;
}

#banner-message.alt {
  background: #0084ff;
  color: #fff;
  margin-top: 40px;
  width: 200px;
}

#banner-message.alt button {
  background: #fff;
  color: #000;
}

JavaScript

$(function() {
  const $sel = $('#sel');
  $sel.find(':nth-child(2)').prop('selected', true);
  $sel.trigger('change');


  $sel.on('change', function() {
    debugger;
    console.log($(this).html() + ' clicked!');
  });
});