| <!DOCTYPE html> |
| <html> |
| <head> |
| <meta charset=utf-8 /> |
| <title>IsInputPending: clicks should be reported during main thread contention</title> |
| </title> |
| <div> |
| Click the button twice and expect two green lines of text. |
| This test should be run under --enable-blink-features=ExperimentalIsInputPending |
| </div> |
| </head> |
| <button onclick="next()">Start</button> |
| <p id="preClickResult"></p> |
| <p id="postClickResult"></p> |
| <script> |
| |
| function hasPendingClick() { |
| return navigator.scheduling.isInputPending(['click']); |
| } |
| |
| // |expected| is the expected value from isInputPending(['click']). |
| function createResult(actual, expected) { |
| const result = document.createElement('div'); |
| if (actual == expected) { |
| result.innerHTML = 'PASSED: isInputPending was ' + actual; |
| result.style = 'color:green'; |
| } |
| else { |
| result.innerHTML = 'FAILED: isInputPending was ' + actual; |
| result.style = 'color:red'; |
| } |
| return result; |
| } |
| |
| let state = "start"; |
| |
| function next() { |
| switch (state) { |
| case "start": |
| // Don't return from the event loop until a click is detected. |
| while (!hasPendingClick()) {} |
| |
| const preClickResult = document.querySelector("#preClickResult"); |
| preClickResult.appendChild(createResult(true, true)); |
| |
| state = "clicked"; |
| break; |
| case "clicked": |
| // In the click event handler, expect no pending clicks. |
| const postClickResult = document.querySelector("#postClickResult"); |
| postClickResult.appendChild(createResult(hasPendingClick(), false)); |
| |
| state = "end"; |
| break; |
| case "end": |
| break; |
| } |
| } |
| |
| </script> |
| </html> |
