[Webkit-unassigned] [Bug 243199] Enable lazy iframe loading by default

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=243199

Sam Sneddon [:gsnedders] <gsnedders at apple.com> changed:

           What    |Removed                     |Added
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                 CC|                            |webkit-bug-importer at group.a
                   |                            |pple.com

--- Comment #1 from Sam Sneddon [:gsnedders] <gsnedders at apple.com> ---
Current WPT results:

/html/semantics/embedded-content/the-iframe-element/iframe-loading-lazy-multiple-queued-navigations.html
  FAIL Multiple queued lazy load navigations do not crash the page - assert_true: The iframe should be navigated to the resource provided by the latest `src` mutation expected true got false
@http://web-platform.test:8000/html/semantics/embedded-content/the-iframe-element/iframe-loading-lazy-multiple-queued-navigations.html:40:16
@http://web-platform.test:8000/resources/testharness.js:2590:30
@http://web-platform.test:8000/resources/testharness.js:2665:37
onload at http://web-platform.test:8000/html/semantics/embedded-content/the-iframe-element/iframe-loading-lazy-multiple-queued-navigations.html:51:29

/html/semantics/embedded-content/the-iframe-element/iframe-loading-lazy.html
  FAIL Below-viewport srcdoc iframes load lazily - assert_true: The window load event should have fired before the below-viewport srcdoc iframe's subresource loads expected true got false
@http://web-platform.test:8000/html/semantics/embedded-content/the-iframe-element/iframe-loading-lazy.html:52:16
@http://web-platform.test:8000/resources/testharness.js:2590:30
@http://web-platform.test:8000/resources/testharness.js:2637:40
onload at about:srcdoc:2:55
  FAIL Below-viewport data: url iframes load lazily - assert_true: The window load event should have fired before the below-viewport data url iframe loads expected true got false
@http://web-platform.test:8000/html/semantics/embedded-content/the-iframe-element/iframe-loading-lazy.html:65:16
@http://web-platform.test:8000/resources/testharness.js:2590:30
@http://web-platform.test:8000/resources/testharness.js:2665:37
onload at http://web-platform.test:8000/html/semantics/embedded-content/the-iframe-element/iframe-loading-lazy.html:96:38
  FAIL Below-viewport blob url iframes load lazily - assert_true: The window load event should have fired before the below-viewport blob url iframe loads expected true got false
@http://web-platform.test:8000/html/semantics/embedded-content/the-iframe-element/iframe-loading-lazy.html:72:16
@http://web-platform.test:8000/resources/testharness.js:2590:30
@http://web-platform.test:8000/resources/testharness.js:2665:37
onload at http://web-platform.test:8000/html/semantics/embedded-content/the-iframe-element/iframe-loading-lazy.html:100:38

The former of these is bug 243198, the latter of these I haven't actually filed (but I don't think needs to block shipping, especially while Chrome fails them: https://wpt.fyi/results/html/semantics/embedded-content/the-iframe-element/iframe-loading-lazy.html?label=master&label=experimental&aligned

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