Fallback background-image if default doesn't exist

Question

I want to set an image as a background, however the image name might be either bg.png or bg.jpg.

Is there any non-javascript way to create

Answer 1

You can use multiple backgrounds if there is no transparency involved and they occupy all available space or have the same size:

div{   
     background-image: url('http://placehold.it/1000x1000'), url('http://placehold.it/500x500');
     background-repeat:no-repeat;
     background-size: 100%;
     height:200px;
     width:200px;
}

If the first doesn't exit, the second will be displayed.

div{   
     background-image: url('http://placehol/1000x1000'), url('http://placehold.it/500x500');
     background-repeat:no-repeat;
     background-size: 100%;
     height:200px;
     width:200px;
}