iFrame Height Auto (CSS)

Question

I am having problems with my iframe. I really want the frame to auto adjust heights according to the content within the iframe. I really want to do this via the CSS without

Answer 1

 

    
Update Information
    

        

            
        
    
  
 #support-box {
        width: 50%;
        float: left;
        display: block;
        height: 20rem; /* is support box height you can change as per your requirement*/
        background-color:#000;
    }
    #wrapper {
        width: 90%;
        display: block;
        position: relative;
        top: 50%;
        transform: translateY(-50%);
         background:#ffffd;
       margin:auto;
       height:100px; /* here the height values are automatic you can leave this if you can*/

    }
    #wrapper iframe {
        width: 100%;
        display: block;
        padding:10px;
        margin:auto;
    }

https://jsfiddle.net/umd2ahce/1/