File: image-loading-lazy-move-document.html

package info (click to toggle)
thunderbird 1%3A143.0.1-1
  • links: PTS, VCS
  • area: main
  • in suites: experimental
  • size: 4,703,968 kB
  • sloc: cpp: 7,770,492; javascript: 5,943,842; ansic: 3,918,754; python: 1,418,263; xml: 653,354; asm: 474,045; java: 183,079; sh: 111,238; makefile: 20,410; perl: 14,359; objc: 13,059; yacc: 4,583; pascal: 3,405; lex: 1,720; ruby: 999; exp: 762; sql: 715; awk: 580; php: 436; lisp: 430; sed: 69; csh: 10
file content (38 lines) | stat: -rw-r--r-- 1,294 bytes parent folder | download | duplicates (25)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
<!DOCTYPE html>
<head>
<title>Moving loading='lazy' image into another top level document</title>
<link rel="help" href="https://github.com/scott-little/lazyload">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
</head>

<div style="height:1000vh;"></div>
<img loading="lazy"
     src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAIAAAAC64paAAAAG0lEQVR42mP8z0A%2BYKJA76jmUc2jmkc1U0EzACKcASfOgGoMAAAAAElFTkSuQmCC">
<script>
promise_test(async t => {
  let image_loaded = false;
  const img = document.querySelector("img");
  img.addEventListener("load", () => { image_loaded = true; });

  await new Promise(resolve => window.addEventListener("load", resolve));

  assert_false(image_loaded,
               "lazy-load image shouldn't be loaded yet");

  const anotherWin = window.open("resources/newwindow.html");

  await new Promise(resolve => anotherWin.addEventListener("load", resolve));

  anotherWin.document.body.appendChild(img);

  assert_false(image_loaded,
               "lazy-load image shouldn't be loaded yet");

  img.scrollIntoView();

  await new Promise(resolve => img.addEventListener("load", resolve));
  assert_true(img.complete,
              "Now the lazy-load image should be loaded");
});
</script>