jQuery addClass example

Change class name on click in jQuery

by Petr Haluza

HTML

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

CSS

body {
  background: white;
  padding: 20px;
  font-family: Helvetica;
}

JavaScript

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

// handle click and add class
button.on("click", function(){
  banner.addClass("alt")
})