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Issue 2556243003: IntersectionObserver: compute correct intersection ratio for 0x0 elements (Closed)
Patch Set: Logic fix Created 4 years ago
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1 <!DOCTYPE html>
2 <script src="../resources/intersection-observer-helper-functions.js"></script>
3 <script src="../resources/testharness.js"></script>
4 <script src="../resources/testharnessreport.js"></script>
5
6 <title>Ensure that a visible zero-area element is given the correct intersection ratio</title>
7
8 <div id='target' style='width: 0px; height: 0px'</div>"
9
10 <script>
11 'use strict';
12
13 async_test(t => {
14 let target = document.getElementById('target');
15 let entries = [];
16 new IntersectionObserver(changes => {
17 entries.push(...changes);
18 }).observe(target);
19 waitForNotification(t.step_func_done(() => {
20 assert_equals(entries.length, 1);
21 assert_equals(entries[0].intersectionRatio, 1);
22 }));
23 });
24 </script>
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