jQuery addClass example

Change class name on click in jQuery

by Kabir Hossain

HTML

<div id="banner-message">
  <p>Hello World</p>
  <button>Change color</button>
</div>

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

var start = '5:30';
   var end = '7:50';
   s = start.split(':');
   e = end.split(':');
   min = e[1]-s[1];
   hour_carry = 0;
   if(min < 0) {
       min += 60;
       hour_carry += 1;
   }
   hour = e[0]-s[0]-hour_carry;
   min = ((min/60)*100).toString()
   diff = hour + ":" + min.substring(0,2);
   alert(diff);