| <!DOCTYPE html> |
| <html> |
| <head> |
| <meta charset="utf-8"> |
| <script src="../resources/testharness.js"></script> |
| <script src="../resources/testharnessreport.js"></script> |
| <style> |
| #box { |
| position: relative; |
| height: 20px; |
| width: 20px; |
| background-color: #9bb; |
| left: 0px; |
| top: 0px; |
| animation-name: horiz, vert; |
| animation-duration: 4s; |
| animation-iteration-count: infinite; |
| animation-direction: alternate; |
| animation-timing-function: linear; |
| } |
| @keyframes horiz { |
| from { left: 100px; } |
| to { left: 500px; } |
| } |
| @keyframes vert { |
| from { top: 100px; } |
| to { top: 500px; } |
| } |
| </style> |
| </head> |
| <body> |
| <!-- |
| This test performs two animations, left and top. |
| When it removes the left animation, the top animation |
| should continue from where it left off. |
| --> |
| <div id="box"></div> |
| <script> |
| 'use strict'; |
| function waitForProgress() { |
| var initialTop = getComputedStyle(box).top; |
| return new Promise(resolve => { |
| function poll() { |
| var top = getComputedStyle(box).top; |
| if (top === initialTop) { |
| requestAnimationFrame(poll); |
| } else { |
| resolve(); |
| } |
| } |
| requestAnimationFrame(poll); |
| }); |
| } |
| |
| async_test(t => { |
| var previousTop = getComputedStyle(box).top; |
| waitForProgress().then(t.step_func(() => { |
| assert_greater_than(parseFloat(getComputedStyle(box).left), 100); |
| var currentTop = getComputedStyle(box).top; |
| assert_greater_than(parseFloat(currentTop), parseFloat(previousTop)); |
| box.style.animationName = 'vert'; |
| assert_equals(getComputedStyle(box).left, '0px'); |
| assert_equals(getComputedStyle(box).top, currentTop); |
| previousTop = currentTop; |
| })).then(waitForProgress).then(t.step_func_done(() => { |
| assert_equals(getComputedStyle(box).left, '0px'); |
| assert_greater_than(parseFloat(getComputedStyle(box).top), parseFloat(previousTop)); |
| })); |
| }, 'top animation continues when left animation stops'); |
| </script> |
| </body> |
| </html> |
