| Tobias Schneider | 9a6600e | 2017-06-28 17:46:45 | [diff] [blame] | 1 | <!DOCTYPE html> |
| Hiroyuki Ikezoe | 9ddcc73 | 2019-05-18 23:45:29 | [diff] [blame] | 2 | <meta name="viewport" content="width=device-width,initial-scale=1"> |
| Tobias Schneider | 9a6600e | 2017-06-28 17:46:45 | [diff] [blame] | 3 | <script src="/resources/testharness.js"></script> |
| 4 | <script src="/resources/testharnessreport.js"></script> |
| 5 | <script src="./resources/intersection-observer-test-utils.js"></script> |
| 6 | |
| 7 | <style> |
| 8 | pre, #log { |
| 9 | position: absolute; |
| 10 | top: 0; |
| 11 | left: 200px; |
| 12 | } |
| 13 | .spacer { |
| 14 | height: calc(100vh + 100px); |
| 15 | } |
| 16 | #target { |
| 17 | width: 100px; |
| 18 | height: 100px; |
| 19 | background-color: green; |
| 20 | } |
| 21 | </style> |
| 22 | <div class="spacer"></div> |
| 23 | <div id="target"></div> |
| 24 | <div class="spacer"></div> |
| 25 | |
| 26 | <script> |
| 27 | var entries = []; |
| 28 | |
| 29 | runTestCycle(function() { |
| 30 | var target = document.getElementById("target"); |
| 31 | assert_true(!!target, "Target exists"); |
| 32 | function createObserver() { |
| 33 | new IntersectionObserver(function(changes) { |
| 34 | entries = entries.concat(changes) |
| 35 | }).observe(target); |
| 36 | } |
| 37 | createObserver(); |
| 38 | runTestCycle(step0, "First rAF"); |
| 39 | }, "IntersectionObserver that is unreachable in js should still generate notifications."); |
| 40 | |
| 41 | function step0() { |
| 42 | document.scrollingElement.scrollTop = 300; |
| 43 | runTestCycle(step1, "document.scrollingElement.scrollTop = 300"); |
| 44 | assert_equals(entries.length, 1, "One notification."); |
| 45 | } |
| 46 | |
| 47 | function step1() { |
| 48 | document.scrollingElement.scrollTop = 0; |
| 49 | assert_equals(entries.length, 2, "Two notifications."); |
| 50 | } |
| 51 | </script> |
