File: shift-into-viewport.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 (36 lines) | stat: -rw-r--r-- 1,054 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
 
<!DOCTYPE html>
<title>Layout Instability: shift into viewport</title>
<link rel="help" href="https://wicg.github.io/layout-instability/" />
<style>

body { margin: 0; }
#j { position: absolute; width: 600px; height: 200px; top: 100%; background: blue; }

</style>
<div id='j'></div>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="resources/util.js"></script>
<script>

promise_test(async () => {
  const watcher = new ScoreWatcher;

  // Wait for the initial render to complete.
  await waitForAnimationFrames(2);

  // Move div partially into viewport.
  document.querySelector("#j").style.top =
      document.documentElement.clientHeight - 200 + "px";

  // The element moves from outside the viewport to within the viewport, which
  // should generate a shift.
  // (width 600) * (height 0 + move 200)
  const expectedScore = computeExpectedScore(600 * 200, 200);

  await watcher.promise;
  assert_equals(watcher.score, expectedScore);
}, "Shift into viewport.");

</script>