jQuery addClass example

Change class name on click in jQuery

by Pankaj Parkar

HTML

<div id="banner-message">
  <p>Hello World</p>
  <button>Make Ajax</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

// find elements
var banner = $("#banner-message")
var button = $("button")

// handle click and add class
button.on("click", function(){
  $.ajax({
    url: '/echo/json',
    xhr: function() {
        var xhr = $.ajaxSettings.xhr();
        xhr.upload.onprogress = function(e) {
            console.log(Math.floor(e.loaded / e.total *100) + '%');
        };
        return xhr;
    },
    success: function(response) {
        //your code..
    }
});
})