1507842 - Removing src attribute from iframe should load about:blank in it

Status: RESOLVED FIXED

(Core :: DOM: Core & HTML, enhancement)

Description

[Boris Zbarsky [:bzbarsky]]

See https://html.spec.whatwg.org/multipage/iframe-embed-object.html#otherwise-steps-for-iframe-or-frame-elements step 1.

It looks like we don't even run https://html.spec.whatwg.org/multipage/iframe-embed-object.html#process-the-iframe-attributes on src attr removal.  Testcase:

  <iframe src="data:text/html,A  test"></iframe>
  <div onclick="document.querySelector('iframe').removeAttribute('src');">
    Click me
  </div>

Chrome and Safari both load about:blank in this case.

Comment 1

[Boris Zbarsky [:bzbarsky]]

Attachment: Removing an src attribute from an iframe should load about:blank in it

Comment 2

[Pulsebot]

Pushed by [e-mail]:
https://hg.mozilla.org/integration/mozilla-inbound/rev/60639eb34a6d
Removing an src attribute from an iframe should load about:blank in it.  r=baku

Comment 3

[Pulsebot]

Pushed by [e-mail]:
https://hg.mozilla.org/integration/mozilla-inbound/rev/deefae2125c4
Fix tab/space lint failure on a CLOSED TREE

Comment 4

[Web Platform Test Sync Bot [:wpt-sync] (Matrix: #interop:mozilla.org)]

Created web-platform-tests PR https://github.com/web-platform-tests/wpt/pull/14141 for changes under testing/web-platform/tests

Comment 5

[Razvan Maries]

https://hg.mozilla.org/mozilla-central/rev/60639eb34a6d
https://hg.mozilla.org/mozilla-central/rev/deefae2125c4

Comment 6

[Web Platform Test Sync Bot [:wpt-sync] (Matrix: #interop:mozilla.org)]

Upstream PR merged

Comment 7

[Chris Mills [:cmills]]

Note to MDN writers' team:

I've added a note about this to the Fx65 rel notes:
https://developer.mozilla.org/en-US/docs/Mozilla/Firefox/Releases/65#HTML

I don't think there is a lot of docs work to do here, but you might want to add a note about this somewhere on the <iframe> reference page.

Comment 8

[Chris Mills [:cmills]]

I've added a note about this to the src information at
https://developer.mozilla.org/en-US/docs/Web/HTML/Element/iframe#Attributes
https://developer.mozilla.org/en-US/docs/Web/API/HTMLIFrameElement#Properties

I'm not sure if this needs a specific entry in the browser compatibility data?