W3C home > Mailing lists > Public > public-html@w3.org > April 2014

Re: iframe@srcdoc

From: Boris Zbarsky <bzbarsky@MIT.EDU>
Date: Sat, 05 Apr 2014 12:31:24 -0400
Message-ID: <53402FDC.2000003@mit.edu>
To: Andry Rendy <master.skywalker.88@gmail.com>
CC: public-html@w3.org
On 4/5/14 5:56 AM, Andry Rendy wrote:
> This indeed doesn't change my consideration about the relationship
> between src attribute and content. My proposal is to give visibility to
> the content as far as no src attribute is set. Of course if scripts
> modify the element by setting a src attribute, the content will be
> hidden as per precedence rule.

Yes, but it will show until the src is set, which is a 
backwards-incompatible change from current behavior.

> IDK about document.write() and how it can
> be used in order to change the embedded content (I think that you
> referred to that when you say "get content inserted into them").

Like this:

  <iframe id="x">Fallback content</iframe>
  <script>
    document.getElementById("x").contentDocument.open();
    document.getElementById("x").contentDocument.write("Hey");
    document.getElementById("x").contentDocument.close();
  </script>

> It wouldn't, actually. Suppose that the content of the iframe element is
> actually shown only when a src is not set (this means that when a src is
> set either via script or via a hyperlink targeting the current frame,
> this document "hides" the content).

That's a backwards-incompatible change, as I said above.

> All novelties require changes in the specifications.

While true, the question is how extensive the changes are and how much 
they affect the behavior of existing content.

> As of october 2013 no pages in a statistically significant cross-section provided by
> WebDevData used @srcdoc, maybe the reason is that such attribute is
> highly impractical

That's possible.

An alternative explanation is that the first version of Firefox to 
support @srcdoc was Firefox 25, which shipped on October 29, 2013, and 
that there is no shipping version of IE that supports @srcdoc.

This is not to say that @srcdoc is not a pain to use.  I agree that it is.

-Boris
Received on Saturday, 5 April 2014 16:31:54 UTC

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