File: zero-area-element-visible.html

package info (click to toggle)
firefox-esr 78.15.0esr-1~deb11u1
  • links: PTS, VCS
  • area: main
  • in suites: bullseye
  • size: 3,301,156 kB
  • sloc: cpp: 5,665,905; javascript: 4,798,386; ansic: 2,878,233; python: 977,004; asm: 270,347; xml: 181,456; java: 111,756; sh: 72,926; makefile: 21,819; perl: 13,380; cs: 4,725; yacc: 4,565; objc: 3,026; pascal: 1,787; lex: 1,720; ada: 1,681; exp: 505; php: 436; lisp: 260; awk: 152; ruby: 103; csh: 80; sed: 53; sql: 45
file content (40 lines) | stat: -rw-r--r-- 1,147 bytes parent folder | download | duplicates (10) 
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
 
<!DOCTYPE html>
<meta name="viewport" content="width=device-width,initial-scale=1">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="./resources/intersection-observer-test-utils.js"></script>

<style>
pre, #log {
  position: absolute;
  top: 0;
  left: 200px;
}
#target {
  width: 0px;
  height: 0px;
}
</style>

<div id='target'></div>

<script>
var entries = [];

runTestCycle(function() {
  var target = document.getElementById('target');
  assert_true(!!target, "target exists");
  var observer = new IntersectionObserver(function(changes) {
    entries = entries.concat(changes)
  });
  observer.observe(target);
  entries = entries.concat(observer.takeRecords());
  assert_equals(entries.length, 0, "No initial notifications.");
  runTestCycle(step0, "First rAF should generate a notification.");
}, "Ensure that a zero-area target intersecting root generates a notification with intersectionRatio == 1");

function step0() {
  assert_equals(entries.length, 1, "One notification.");
  assert_equals(entries[0].intersectionRatio, 1, "intersectionRatio == 1");
}
</script>