This reverts commit 7e4d1e8
temporarily, as it breaks building the HTML Standard on master. When
whatwg/html#5916 is finished and merged, then we
can add this check back.

This reverts commit 7e4d1e8
temporarily, as it breaks building the HTML Standard on master. When
whatwg/html#5916 is finished and merged, then we
can add this check back.

Follow up to whatwg#5694 whatwg#5916 setting dfn types on more items identified by reffy

Follow up to whatwg#5694 whatwg#5916 whatwg#5956 setting dfn types on items defined in IDL fragments

Follow up to whatwg#5694 whatwg#5916 setting dfn types on more items identified by reffy

Follow-up to:

* #5694
* #5916

...setting dfn types on more items identified by reffy

A follow-up to:

* #5694
* #5916

* Editorial: remove redundant "the"

* Meta: default branch rename

Also correct a broken link. Not even w3.org URLs are that cool.

Helps with whatwg/meta#174.

* Editorial: clean up calls to "parse a URL"

It actually takes a string, so calls should be clear about that.

* Review Draft Publication: January 2021

* Simplify <link>s

In particular, remove their activation behavior, stop them from matching
:link and :visited, and stop suggesting that they be focusable areas.

This also includes a slight expansion and rearrangement of the link
element's section to make it clearer what hyperlinks created by <link>
are meant for, contrasting them to <a> and <area> hyperlinks.

Closes whatwg#4831. Closes whatwg#2617. Helps with whatwg#5490.

* Meta: remove demos/offline/* (whatwg#6307)

These are no longer needed as of e4330d5.

* Meta: minor references cleanup

Use more HTTPS and drop obsolete HTML Differences reference.

* Editorial: anticlockwise → counterclockwise

We use en-US these days. Spotted in https://twitter.com/iso2022jp/status/1352601086519955456.

* Use :focus-visible in the UA stylesheet

See w3c/csswg-drafts#4278.

* Editorial: align with WebIDL and Infra

* Fix "update a style block" early return

The new version matches implementation reality and CSSWG resolution.

The algorithm was also inconsistent, as it looked at whether
the element was in a shadow tree or in the document tree, but it was
only specified to be re-run if the element becomes connected or
disconnected.

The CSSWG discussed this in
w3c/csswg-drafts#3096 (comment)
and http://wpt.live/shadow-dom/ShadowRoot-interface.html tests this.

This also matches closer the definition of <link rel="stylesheet">,
which does use connectedness (though it uses "browsing-context
connected", which is a bit different):
https://html.spec.whatwg.org/#link-type-stylesheet

* Modernize and refactor simple dialogs

This contains a small bug fix, in that confirm() and prompt() said
"return" in some cases instead of "return false" or "return null" as
appropriate.

Other notable changes, all editorial, are:

* Factoring out repeated "cannot show simple dialogs" steps, which will
  likely expand over time (see e.g. whatwg#6297).
* Separating out and explaining the no-argument overload of alert().
* Passing the document through to the "printing steps", instead of just
  having them talk about "this Window object".

* Meta: add definition markup for MessageEvent

* Remove <marquee> events

They are only supported by one engine (Gecko).

Closes whatwg#2957.

* Clarify when microtasks happen

* Ignore COEP on non-secure contexts

Fixes whatwg#6328.

* Editorial: update URL Standard integration

* Editorial: only invoke response's location URL once

Complements whatwg/fetch#1149.

* Track the incumbent settings and active script in Promise callbacks

Closes whatwg#5213.

* createImageBitmap(): stop clipping sourceRect to source's dimensions

It has been found in whatwg#6306 that this was an oversight at the time of its introduction. Current behavior goes against author expectations and no implementer has opposed the change to "no-clip".

Tests: web-platform-tests/wpt#27040.

Closes whatwg#6306.

* Remove CSP plugin-types blocking

With Flash not being supported anymore, the CSP directive plugin-types has lost its main reason for being and is being removed from the Content Security Policy specification: w3c/webappsec-csp#456.

This change removes references to the relevant algorithm from the Content Security Policy spec.

* Meta: set more dfn types

A follow-up to:

* whatwg#5694
* whatwg#5916

* Editorial: occuring → occurring

* Make all plugin-related APIs no-ops

Part of whatwg#6003.

* Disallow simple dialogs from different-origin domain iframes

Closes whatwg#5407.

* Revive @@iterator for PluginArray/MimeTypeArray/Plugin

@@iterator is implicitly installed by defining an indexed property getter. Since there is no other way to define it exclusively, this restores some methods back to being indexed getters.

This fixes an inadvertent observable behavior change in d4f07b8.

* Adjust web+ scheme security considerations to account for FTP removal

Also, network scheme is now reduced to HTTP(S) scheme.

Helps with whatwg#5375, but form submission issue remains.

See whatwg/fetch#1166 for context.

* Meta: export pause

Nobody but XMLHttpRequest take a dependency on this please. You have been warned.

Context: whatwg/xhr#311.

* Fix typo: ancestor → accessor

Fixes whatwg#6374.

Co-authored-by: Dominic Farolino <domfarolino@gmail.com>
Co-authored-by: Anne van Kesteren <annevk@annevk.nl>
Co-authored-by: Domenic Denicola <d@domenic.me>
Co-authored-by: Emilio Cobos Álvarez <emilio@crisal.io>
Co-authored-by: Momdo Nakamura <xmomdo@gmail.com>
Co-authored-by: Jake Archibald <jaffathecake@gmail.com>
Co-authored-by: Yutaka Hirano <yhirano@chromium.org>
Co-authored-by: Shu-yu Guo <syg@chromium.org>
Co-authored-by: Kaiido <tristan.fraipont@gmail.com>
Co-authored-by: Antonio Sartori <anton.sartori@gmail.com>
Co-authored-by: Michael[tm] Smith <mike@w3.org>
Co-authored-by: Ikko Ashimine <eltociear@gmail.com>
Co-authored-by: Carlos IL <carlosjoan91@gmail.com>
Co-authored-by: Kagami Sascha Rosylight <saschanaz@outlook.com>
Co-authored-by: Simon Pieters <zcorpan@gmail.com>

Follow up to whatwg#5694 whatwg#5916 whatwg#5956 setting dfn types on items defined in IDL fragments