jQuery addClass example

Change class name on click in jQuery

by Aditya Sharma

HTML

<form class="check-dirty">
  <input type="text" name="test2">
  <input type="text" name="test3">
  <button data-param-source="#test1">Test</button>
</form>

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 checkDirtyForm = $(".check-dirty")
var dirtyHandler = function(){
  jQuery(this).closest("form").addClass("dirty");
}
checkDirtyForm.find(":submit").filter(":disabled").each(function() {
	jQuery(this).closest("form").addClass("dirty");
})
// handle click and add class
checkDirtyForm.on("change", ":input", dirtyHandler)
checkDirtyForm.on("click", "a", dirtyHandler)