| <!doctype html> |
| <html> |
| <head> |
| <meta charset=utf-8> |
| <title>CSS Transitions Test: Transitions do not run for an element that is not being rendered</title> |
| <link rel="help" title="Starting transitions" |
| href="https://drafts.csswg.org/css-transitions/#starting"> |
| |
| <script src="/resources/testharness.js" type="text/javascript"></script> |
| <script src="/resources/testharnessreport.js" type="text/javascript"></script> |
| <script src="./support/helper.js" type="text/javascript"></script> |
| |
| </head> |
| <body> |
| <div id="log"></div> |
| |
| <script> |
| promise_test(async t => { |
| // Create element that is not rendered |
| const div = addDiv(t, { |
| style: |
| 'transition: background-color 100s;' + |
| 'background-color: red;' + |
| 'display: none', |
| }); |
| |
| // Attach event listeners |
| div.addEventListener( |
| 'transitionrun', |
| t.step_func(() => { |
| assert_unreached('transitionrun event should not be fired'); |
| }) |
| ); |
| |
| // Resolve before-change style |
| getComputedStyle(div).backgroundColor; |
| |
| // Set up and resolve after-change style |
| div.style.backgroundColor = 'green'; |
| getComputedStyle(div).backgroundColor; |
| |
| // There should be no events received for the triggered transition. |
| await waitForFrame(); |
| await waitForFrame(); |
| }, 'Transitions do not run on an element not being rendered'); |
| |
| test(t => { |
| // Create element that is not rendered |
| const div = addDiv(t, { |
| style: |
| 'transition: background-color 100s;' + |
| 'background-color: red;' + |
| 'display: none', |
| }); |
| |
| // Resolve before-change style |
| getComputedStyle(div).backgroundColor; |
| |
| // Make it rendered |
| div.style.display = 'block'; |
| |
| // Set up and resolve after-change style |
| div.style.backgroundColor = 'green'; |
| getComputedStyle(div).backgroundColor; |
| |
| // We should have jumped immediately to the after-change style rather than |
| // transitioning to it. |
| assert_equals( |
| getComputedStyle(div).backgroundColor, |
| 'rgb(0, 128, 0)', |
| 'No transition should run' |
| ); |
| }, 'Transitions do not run for an element newly rendered'); |
| |
| promise_test(async t => { |
| // Create element |
| const div = addDiv(t, { |
| style: 'transition: background-color 100s; background-color: red', |
| }); |
| |
| // Attach event listeners |
| div.addEventListener('transitionrun', t.step_func(() => { |
| assert_unreached('transitionrun event should not be fired'); |
| })); |
| |
| // Resolve before-change style |
| getComputedStyle(div).backgroundColor; |
| |
| // Set up after-change style |
| div.style.backgroundColor = 'green'; |
| |
| // But make the element non-rendered |
| div.style.display = 'none'; |
| |
| // There should be no events received for the triggered transition. |
| await waitForFrame(); |
| await waitForFrame(); |
| }, 'Transitions do not run for an element newly made not rendered'); |
| |
| promise_test(async t => { |
| // Create element |
| const div = addDiv(t, { |
| style: 'transition: background-color 100s; background-color: red', |
| }); |
| |
| // Attach event listeners |
| const eventWatcher = new EventWatcher(t, div, [ |
| 'transitionrun', |
| 'transitioncancel', |
| ]); |
| |
| // Trigger transition |
| getComputedStyle(div).backgroundColor; |
| div.style.backgroundColor = 'green'; |
| getComputedStyle(div).backgroundColor; |
| |
| await eventWatcher.wait_for('transitionrun'); |
| |
| // Make the element no longer rendered |
| div.style.display = 'none'; |
| |
| await eventWatcher.wait_for('transitioncancel'); |
| }, 'Transitions are canceled when an element is no longer rendered'); |
| </script> |
| |
| </body> |
| </html> |
