File: background-image-set-image.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 (42 lines) | stat: -rw-r--r-- 1,293 bytes parent folder | download | duplicates (4) 
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
39
40
41
42
 
<!doctype html>
<title>Background image-set images should be LCP candidates</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<style>
  .background {
    width: calc(100vw - 40px);
    height: calc(100vw - 40px);
    max-width: 100px;
    max-height: 100px;
    background: #eee image-set("/images/lcp-100x50.png" type("image/png")) center center no-repeat;
    background-size: cover;
  }
</style>
<body>
  <div class="background"></div>
  <p>fallback</p>
</body>

<script>
  promise_test(async (t) => {
    await Promise.race([
      new Promise((resolve) => {
        const entries = [];
        new PerformanceObserver((list) => {
          entries.push(...list.getEntries());
          for (const entry of entries) {
            if (entry.url.includes("lcp-100x50")) {
              resolve(entry.url);
              return;
            }
          }
        }).observe({ type: "largest-contentful-paint", buffered: true });
      }),
      new Promise((resolve, reject) => {
        t.step_timeout(() => {
          reject(new Error("Timed out waiting for LCP entry for background image-set image."));
        }, 3000);
      }),
    ]);
  }, "Background image-set images should be eligible for LCP candidates");
</script>