jQuery addClass example

Change class name on click in jQuery

by veer_vin

HTML

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

CSS

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

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

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

JavaScript

$("#banner button").click( function(){
   chatTimer();
});

function chatTimer(){
	var counter = 600;
   setInterval(function() {
     counter--;
      if (counter >= 0) {
         span = document.getElementById("count");
         span.innerHTML = counter;
      }
      if (counter === 0) {
         alert('sorry, out of time');
         clearInterval(counter);
       }
     }, 1000);
}