| <!DOCTYPE html> |
| <html> |
| <head> |
| <meta charset=utf-8 /> |
| <title>ShouldYield: clicks should make shouldYield return true. |
| </title> |
| <div> |
| Click the button and expect two green lines of text. |
| This test should be run under --enable-blink-features=ExperimentalShouldYield. |
| </div> |
| </head> |
| <button onclick="runTest()">Click me</button> |
| <p id="shortTaskResult"></p> |
| <p id="longTaskResult"></p> |
| <script> |
| // |expected| is the expected value from performance.shouldYield. |
| function createResult(expected) { |
| const result = document.createElement('div'); |
| const shouldYield = performance.shouldYield; |
| if (shouldYield == expected) { |
| result.innerHTML = 'PASSED: performance.shouldYield was ' + shouldYield; |
| result.style = 'color:green'; |
| } |
| else { |
| result.innerHTML = 'FAILED: performance.shouldYield was ' + shouldYield; |
| result.style = 'color:red'; |
| } |
| return result; |
| } |
| |
| function shortTaskCheck() { |
| document.getElementById("shortTaskResult").appendChild(createResult(false)); |
| } |
| |
| let hasPrinted = false; |
| function runTest() { |
| if (hasPrinted) |
| return; |
| // Be busy until shouldYield becomes true. |
| while ( !performance.shouldYield ) {} |
| document.getElementById('longTaskResult').appendChild(createResult(true)); |
| hasPrinted = true; |
| setTimeout(shortTaskCheck, 0); |
| } |
| </script> |
| </html> |
