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WIP - Prototype auto sizes for lazy-loaded img
Spec PR: whatwg/html#8008 WPT tests PR: #34427 R=pdr Bug: 1359051 Change-Id: I8e9bc836e9582a9209db53d55e0edc96f90499f2
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.../semantics/embedded-content/the-img-element/sizes/reference/sizes-auto-rendering-ref.html
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,8 @@ | ||
| <!doctype html> | ||
| <title>Auto sizes rendering</title> | ||
| <link rel="help" href="specLinkTBDhttps://drafts.csswg.org/css-images-4/#image-set-notation"> | ||
| <meta name="assert" content="auto sizes rendering"> | ||
| <img | ||
| src="/images/green.png" | ||
| width="100px" | ||
| > |
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html/semantics/embedded-content/the-img-element/sizes/sizes-auto-rendering-dynamic.html
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,31 @@ | ||
| <!doctype html> | ||
| <html class="reftest-wait"> | ||
| <title>Auto sizes dynamic rendering</title> | ||
| <link rel="help" href="specLinkTBD"> | ||
| <link rel="match" href="reference/sizes-auto-rendering-ref.html"> | ||
| <script src="/common/rendering-utils.js"></script> | ||
| <script src="/common/reftest-wait.js"></script> | ||
| <meta name="assert" content="auto sizes dynamic rendering"> | ||
| <img | ||
| id="testImg" | ||
| loading="lazy" | ||
| srcset=" | ||
| /images/fail.gif 200w, | ||
| /images/green.png 100w, | ||
| /images/red.png 50w | ||
| " | ||
| sizes="auto" | ||
| width="50px" | ||
| > | ||
| <script> | ||
| function secondImageLoaded() { | ||
| waitForAtLeastOneFrame().then(takeScreenshot); | ||
| } | ||
|
|
||
| function firstImageLoaded() { | ||
| testImg.addEventListener('load', secondImageLoaded); | ||
| testImg.style.width = '100px'; | ||
| } | ||
|
|
||
| testImg.addEventListener('load', firstImageLoaded, {once: true}); | ||
| </script> |
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html/semantics/embedded-content/the-img-element/sizes/sizes-auto-rendering.html
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,26 @@ | ||
| <!doctype html> | ||
| <html class="reftest-wait"> | ||
| <title>Auto sizes rendering</title> | ||
| <link rel="help" href="specLinkTBD"> | ||
| <link rel="match" href="reference/sizes-auto-rendering-ref.html"> | ||
| <script src="/common/rendering-utils.js"></script> | ||
| <script src="/common/reftest-wait.js"></script> | ||
| <meta name="assert" content="auto sizes rendering"> | ||
| <img | ||
| id="testImg" | ||
| loading="lazy" | ||
| srcset=" | ||
| /images/fail.gif 50w, | ||
| /images/green.png 100w, | ||
| /images/red.png 200w | ||
| " | ||
| sizes="auto" | ||
| width="100px" | ||
| > | ||
| <script> | ||
| function imageLoaded() { | ||
| waitForAtLeastOneFrame().then(takeScreenshot); | ||
| } | ||
|
|
||
| testImg.addEventListener('load', imageLoaded); | ||
| </script> |