jQuery addClass example

Change class name on click in jQuery

by rajnandan1

HTML

<div id="banner-message">
  <p>Hello World</p>
  <button>Change color</button>
  <input class="form-control" type="text" id="txt_credit_days" name="" 
pattern="^[A-Z0-9._%+-]+@[A-Z0-9.-]+\.[A-Z]{2,4}$"title="Enter in specified 
format">
</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")
})

$("input[pattern]").blur(function(){
  var elem = $(this);
	 
  var pattern = new RegExp(elem.attr("pattern"));
  if (pattern.test(elem.val())) {
     alert('okay');
  } else {
  	 alert('bad');
  }
})