jQuery addClass example

Change class name on click in jQuery

by rough cheap

HTML

<div style="text-align: center;margin: 10px 0;">
<input id="b1" type="button" value="click Me!">
</div>
<div style="text-align: center;margin: 10px 0;">
<input id="b2" type="button" value="click Me!">
</div>
<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

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

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

$('#b1').on('click', function() {
	banner.empty();
});

$('#b2').on('click', function() {
  banner.html("<p>Hello World</p><button>Change color</button>");
})