jquery - What is preventing my JavaScript from modifying the iframe? -


there example here inserts iframe height of iframe changed height of inserted content. explains trick here.

however when try , bootstrap example, preventing javascript modifying iframe. height never added iframe.

question

can see why height isn't added iframe, done in original example?

i using iframe content

wget http://www.456bereastreet.com/lab/iframe-height/iframe-content.html

and html is

<!doctype html> <html lang="en">   <head>     <meta charset="utf-8">     <meta http-equiv="x-ua-compatible" content="ie=edge">     <meta name="viewport" content="width=device-width, initial-scale=1">     <link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.4/css/bootstrap.min.css" rel="stylesheet">     <script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.2/jquery.min.js"></script>     <script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.4/js/bootstrap.min.js"></script>      <style>       iframe {          width:100%;          margin:0 0 1em;          border:0;       }       #external-frame {min-height:800px;}        body {          padding-top: 70px;       }        .container .jumbotron {          background-color: #ffffff;          padding-right: 0px;          padding-left: 0px;          height: 100%;          margin:0 auto;       }     </style>      <script>       window.onload = function () {          setiframeheight(document.getelementbyid('external-frame'));       };     </script>   </head>   <body>      <div class="container">       <div class="jumbotron">     <iframe src="iframe-content.html" frameborder="0" id="external-frame"></iframe>       </div>     </div>    </body> </html>

this feels obvious, looks didn't define setiframeheight or include script defines it.
if want call function, need have function.
that's function, copied page linked to:

function setiframeheight(iframe) {     if (iframe) {         var iframewin = iframe.contentwindow || iframe.contentdocument.parentwindow;         if (iframewin.document.body) {             iframe.height = iframewin.document.documentelement.scrollheight || iframewin.document.body.scrollheight;         }     } };

paste in script tag , should go.


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