make iframe height dynamic based on content inside- JQUERY/Javascript

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 20  1994
情书的邮戳 2020-11-22 07:42
I am loading an aspx web page in an iframe. The content in the Iframe can be of more height than the iframe\'s height. The iframe should not have scroll bars.
I have
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抹茶落季 (楼主)
2020-11-22 08:15
A slightly improved answer to Aristos...
Then declare in your iframe as follows:
</pre>

<p>There are two minor improvements:</p>

<ol>
<li>You don't need to get the element via document.getElementById - as you already have it in the onload callback.</li>
<li>There's no need to set the <code>iframe.height = ""</code> if you're going to reassign it in the very next statement. Doing so actually incurs an overhead as you're dealing with a DOM element.</li>
</ol>

<p>Edit:
If the content in the frame is always changing then call:</p>

<pre><code>parent.resizeIframe(this.frameElement); 
</code></pre>

<p>from within the iframe after the update. Works for same origin.</p>

<p>Or to auto detect:</p>

<pre><code>  // on resize
  this.container = this.frameElement.contentWindow.document.body;

  this.watch = () => {
    cancelAnimationFrame(this.watcher);

    if (this.lastScrollHeight !== container.scrollHeight) {
      parent.resizeIframeToContentSize(this.frameElement);  
    }
    this.lastScrollHeight = container.scrollHeight;
    this.watcher = requestAnimationFrame(this.watch);
  };
  this.watcher = window.requestAnimationFrame(this.watch);
</code></pre>
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