0
<div id="box"></div>
<div class="text"></div>?



$(document).ready(function () { 
$('#box').click(function () {
      $('.text').slideToggle('slow');
  });


});


#box{
height:40px;
width:100px;
background:red;
}

#box:hover{background:blue;}

#box:after{
content: "";
height: 10px;
position: absolute;
width: 0;
margin-top:40px;
margin-left:40px;
border: 10px solid transparent;
border-top-color: red;
}


#box:hover:after{

border-top-color: blue;
}

.text{

display:none;
height:40px;
width:100px;
background:#fd0;
margin-top:20px;
}

http://jsfiddle.net/zfQvD/16/

Is that possible to use jQuery to add the styled after arrow? when text class is closed, remove after arrow class if text class is shown, then add the arrow? I tried, but seems doesn't work

SomeKittens
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olo
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  • Can you reword what you are trying to accomplish? A little lost by your wording – AJak Nov 14 '12 at 02:26
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    You can't style pseudo elements in JavaScript because they don't actually exist in the DOM. Use a regular tag instead.. – elclanrs Nov 14 '12 at 02:29
  • just add the styled arrow when /expand/, remove arrow when not /expand/ – olo Nov 14 '12 at 02:29
  • possible duplicate of [Manipulating CSS pseudo-elements using jQuery (e.g. :before and :after)](http://stackoverflow.com/questions/5041494/manipulating-css-pseudo-elements-using-jquery-e-g-before-and-after) – Blazemonger Feb 03 '14 at 20:08

1 Answers1

5

As per @elclanrs comment, you can't add pseudo elements with JS. What you can do, however, is declare them in your CSS to be only shown when a parent element has a specific class, and then toggle this class with JS, like this:

#box.expanded:after {
 content:'';
 height: 10px;
 position: absolute;
 width: 0;
 margin-top:40px;
 margin-left:40px;
 border: 10px solid transparent;
 border-top-color: red;
}

You also have to add a line to your JS for this class to be added upon clicking the box:

$('#box').click(function () {
  $(this).toggleClass('expanded');
  $('.text').slideToggle('slow');
});

See the example here: http://jsfiddle.net/zfQvD/17/

unclenorton
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  • What if I can't have a class? Like say, my style is dynamic, calculated from JS and I need to that style to .foo:before. Is there a way to do it? – kvn Jun 24 '15 at 12:24