jQuery addClass example

Change class name on click in jQuery

by aparadise

HTML

<div id="banner-message">
  <p id="foo" style="display:none;">Hello World</p>
  <p>
  dallas
  </p>
  <button>Change color</button>
</div>
<!--
https://stackoverflow.com/questions/15924751/check-if-a-element-is-displaynone-or-block-on-click-jquery
-->

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

var isHidden = document.getElementById("foo").style.display == "none";
/*
if(isHidden){
alert(1)
}else{
alert(2)
}

*/

/*
$('p').filter(function() {
    return console.log( $(this).css('display') == 'none'  );
}).length;
*/

$('p').each(function() {

  if (($(this).css('display') !== 'none') && ($(this).length < 1)  )  {
    alert(1)
  } else {
    alert(2)
  }
});