| Steve Kobes | a7b88cb | 2020-04-24 20:00:20 | [diff] [blame] | 1 | <!DOCTYPE html> |
| 2 | <title>Layout Instability: sources attribute</title> |
| 3 | <link rel="help" href="https://wicg.github.io/layout-instability/" /> |
| 4 | <style> |
| 5 | |
| 6 | body { margin: 10px; } |
| 7 | #shifter { position: relative; width: 300px; height: 100px; } |
| 8 | |
| 9 | </style> |
| 10 | <div id="shifter"></div> |
| 11 | <script src="/resources/testharness.js"></script> |
| 12 | <script src="/resources/testharnessreport.js"></script> |
| 13 | <script src="resources/util.js"></script> |
| 14 | <script> |
| 15 | |
| 16 | strrect = r => `[${r.x},${r.y},${r.width},${r.height}]`; |
| 17 | |
| 18 | promise_test(async () => { |
| 19 | const watcher = new ScoreWatcher; |
| 20 | const shifter = document.querySelector("#shifter"); |
| 21 | |
| 22 | // Wait for the initial render to complete. |
| 23 | await waitForAnimationFrames(2); |
| 24 | |
| 25 | // Modify the position of the div. |
| 26 | shifter.style = "top: 60px; left: 10px"; |
| 27 | await watcher.promise; |
| 28 | |
| 29 | const sources = watcher.lastEntry.sources; |
| 30 | assert_equals(sources.length, 1); |
| 31 | |
| 32 | const source = sources[0]; |
| 33 | assert_equals(source.node, shifter); |
| 34 | assert_equals(strrect(source.previousRect), "[10,10,300,100]"); |
| 35 | assert_equals(strrect(source.currentRect), "[20,70,300,100]"); |
| 36 | }, "Sources attribute."); |
| 37 | |
| 38 | </script> |
