Technical review: Document responsive iframe sizing

[chrisdavidmills]

Description

Chrome 149 adds support for responsive iframe sizing; see https://chromestatus.com/feature/5108373464547328 (it says 151, but the feature still seems to be behind a pref, since 149).

This relies on three new features:

• The CSS frame-sizing property
• The Window.requestResize method
• The <meta name=responsive-embedded-sizing> meta tag

This PR adds docs for all three features.

Motivation

Additional details

Related issues and pull requests

[github-actions]

Preview URLs (6 pages)

• /en-US/docs/Web/API/Window/requestResize
• /en-US/docs/Web/API/Window
• /en-US/docs/Web/CSS/Guides/Box_sizing
• /en-US/docs/Web/CSS/Reference/Properties/frame-sizing
• /en-US/docs/Web/HTML/Reference/Elements/meta/name/responsive-embedded-sizing
• /en-US/docs/Web/HTML/Reference/Elements/meta/name

Flaws (3)

Note! 4 documents with no flaws that don't need to be listed. 🎉

Found an unexpected or unresolvable flaw? Please report it here.

URL: /en-US/docs/Web/API/Window
Title: Window
Flaw count: 2

• macros:
  • Macro domxref produces link /en-US/docs/Web/API/HTMLElement/invalid_event which is a redirect
  • Macro domxref produces link /en-US/docs/Web/API/Element/select_event which is a redirect

---

URL: /en-US/docs/Web/API/Window/requestResize
Title: Window: requestResize() method
Flaw count: 1

• macros:
  • Macro domxref produces link /en-US/docs/Web/API/frame-sizing which doesn't resolve

External URLs (2)

URL: /en-US/docs/Web/API/Window/requestResize
Title: Window: requestResize() method

• https://mdn.github.io/dom-examples/responsive-iframe-sizing/js-request-resize/ (2 times) (Note! This may be a new URL 👀)

---

URL: /en-US/docs/Web/CSS/Reference/Properties/frame-sizing
Title: frame-sizing CSS property

• https://mdn.github.io/dom-examples/responsive-iframe-sizing/basic/ (2 times) (Note! This may be a new URL 👀)