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jQuery: Replace all CSS Background Images

Posted on 2013-06-03
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Last Modified: 2013-06-05
I use jQuery to replace all images that are added with the <img> tag.  How can I also replace all images that are added with CSS?

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>Demo</title>
<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.7/jquery.min.js"></script>
<script type="text/javascript">

$(document).ready(function() {
  $('img').each(function () {
   if($(this).attr('src')) $(this).attr('src','http://upload.wikimedia.org/wikipedia/en/0/0f/Red_X_Symbol.gif');
  });
});

</script>
<style type="text/css">
h1 {
background: transparent url(http://upload.wikimedia.org/wikipedia/commons/8/85/Emoticon_smile.png) no-repeat scroll 0 50%;
padding: 0 0 0 20px;
}
</style>

</head>
<body>

<h1>Logo</h1>
<p><img src="http://upload.wikimedia.org/wikipedia/commons/8/85/Emoticon_smile.png" alt="Smile" /></p>
<p style="padding: 0; margin: 0; width: 16px; height: 16px; background: transparent url(http://upload.wikimedia.org/wikipedia/commons/8/85/Emoticon_smile.png) repeat scroll 0 0;"></p>
<div><img src="http://upload.wikimedia.org/wikipedia/commons/8/85/Emoticon_smile.png" alt="Smile" /></div>
<p style="padding: 0; margin: 0; width: 16px; height: 16px; background: transparent url(http://upload.wikimedia.org/wikipedia/commons/8/85/Emoticon_smile.png) repeat scroll 0 0;"></p>
</body>
</html>

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Question by:hankknight
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3 Comments
 
LVL 58

Accepted Solution

by:
Gary earned 2000 total points
ID: 39217701
Assume you mean has a background-image?

if ($('element').css('background-image')){
...
}
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Author Comment

by:hankknight
ID: 39224100
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>Demo</title>
<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.7/jquery.min.js"></script>
<script type="text/javascript">

$(document).ready(function() {

  $('img').each(function () {
   if($(this).attr('src')) $(this).attr('src',$(this).attr('src')+'?refresh');
   if($(this).attr('longdesc')) $(this).attr('longdesc',$(this).attr('longdesc')+'?refresh');
  });
  $('*').each(function () {
   if($(this).css('background-image') && $(this).css('background-image')!='none') {
       $(this).css('backgroundImage', 'url("'+ $(this).css('background-image').replace(/^url\(['"](.+)['"]\)/, '$1')+'?refresh' +'")');
   }
  });

});

</script>
<style type="text/css">
h1 {
background: transparent url(http://upload.wikimedia.org/wikipedia/commons/8/85/Emoticon_smile.png) no-repeat scroll 0 50%;
padding: 0 0 0 20px;
}
</style>

</head>
<body>

<h1>Logo</h1>
<p><img src="http://upload.wikimedia.org/wikipedia/commons/8/85/Emoticon_smile.png" alt="Smile" /></p>
<p style="padding: 0; margin: 0; width: 16px; height: 16px; background: transparent url(http://upload.wikimedia.org/wikipedia/commons/8/85/Emoticon_smile.png) repeat scroll 0 0;"></p>
<div><img src="http://upload.wikimedia.org/wikipedia/commons/8/85/Emoticon_smile.png" alt="Smile" /></div>
<p style="padding: 0; margin: 0; width: 16px; height: 16px; background: transparent url('http://upload.wikimedia.org/wikipedia/commons/8/85/Emoticon_smile.png') repeat scroll 0 0;"></p>
<p style="padding: 0; margin: 0; width: 16px; height: 16px; background: transparent url('http://upload.wikimedia.org/wikipedia/commons/8/85/Emoticon_smile.png") repeat scroll 0 0;'></p>
</body>
</html>

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Expert Comment

by:Gary
ID: 39224113
Looping each and every element on the page with * is probably not a good idea - if you can, narrow it down to div, span etc.
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