| <!doctype html> |
| <meta charset=utf-8> |
| <title>KeyframeEffect.setKeyframes() for CSS transitions</title> |
| <!-- TODO: Add a more specific link for this once it is specified. --> |
| <link rel="help" href="https://drafts.csswg.org/css-transitions-2/#csstransition"> |
| <script src="/resources/testharness.js"></script> |
| <script src="/resources/testharnessreport.js"></script> |
| <script src="support/helper.js"></script> |
| <div id="log"></div> |
| <script> |
| 'use strict'; |
| |
| test(t => { |
| const div = addDiv(t); |
| |
| div.style.left = '0px'; |
| getComputedStyle(div).transitionProperty; |
| div.style.transition = 'left 100s'; |
| div.style.left = '100px'; |
| |
| const transition = div.getAnimations()[0]; |
| transition.effect.setKeyframes({ left: ['200px', '300px', '100px'] }); |
| |
| assert_equals(getComputedStyle(div).left, '200px'); |
| }, 'Keyframes set using setKeyframes() are reflected in computed style for' |
| + ' a running transition'); |
| |
| test(t => { |
| const div = addDiv(t); |
| |
| div.style.left = '0px'; |
| getComputedStyle(div).transitionProperty; |
| div.style.transition = 'left 100s'; |
| div.style.left = '100px'; |
| |
| const transition = div.getAnimations()[0]; |
| transition.effect.setKeyframes({ top: ['0px', '100px', '300px'] }); |
| |
| assert_equals(transition.transitionProperty, 'left'); |
| }, 'A transition with replaced keyframes still returns the original' |
| + ' transitionProperty'); |
| |
| test(t => { |
| const div = addDiv(t); |
| |
| div.style.left = '0px'; |
| getComputedStyle(div).transitionProperty; |
| div.style.transition = 'left 100s'; |
| div.style.left = '100px'; |
| |
| const transition = div.getAnimations()[0]; |
| transition.effect.setKeyframes({ }); |
| |
| assert_equals(transition.transitionProperty, 'left'); |
| }, 'A transition with no keyframes still returns the original' |
| + ' transitionProperty'); |
| |
| function retarget_test(description, newKeyframes, reversed_start) { |
| test(t => { |
| const div = addDiv(t); |
| |
| div.style.left = '0px'; |
| getComputedStyle(div).transitionProperty; |
| div.style.transition = 'left 100s linear'; |
| div.style.left = '100px'; |
| |
| const transition = div.getAnimations()[0]; |
| transition.currentTime = 50 * MS_PER_SEC; |
| transition.effect.setKeyframes(newKeyframes); |
| |
| // Reverse transition |
| div.style.left = '0px'; |
| const reversedTransition = div.getAnimations()[0]; |
| |
| assert_approx_equals( |
| reversedTransition.effect.getComputedTiming().activeDuration, |
| 50 * MS_PER_SEC, 1, |
| "The reversed transition has correctly reduced duration" |
| ); |
| assert_equals(reversedTransition.effect.getKeyframes()[0].left, reversed_start, |
| "The reversed transition starts at the expected point"); |
| }, description); |
| } |
| |
| retarget_test("A transition with replaced keyframes animating the same property " + |
| "still exhibits normal reversing behavior.", |
| {left: ['200px', '300px', '100px']}, '300px'); |
| |
| retarget_test("A transition with replaced keyframes animating a different property " + |
| "still exhibits normal reversing behavior (reversing from the base value).", |
| {top: ['200px', '300px', '100px']}, '100px'); |
| |
| retarget_test("A transition with replaced keyframes animating nothing " + |
| "still exhibits normal reversing behavior (reversing from the base value).", |
| {}, '100px'); |
| |
| test(t => { |
| const div = addDiv(t); |
| |
| // Initialize the style. |
| div.style.left = '100px'; |
| div.style.top = '100px'; |
| div.style.transition = 'left 100s linear, top 100s linear'; |
| getComputedStyle(div).left; |
| |
| // Start some transitions. |
| div.style.left ='200px'; |
| div.style.top = '200px'; |
| const transitions = div.getAnimations(); |
| |
| // Hand control of the left property over to top's transition. The composite |
| // ordering of the animations is 'left' then 'top' since the transitions were |
| // generated in the same transition generation and follow Unicode ordering. |
| assert_equals(transitions[0].transitionProperty, 'left'); |
| transitions[0].effect.setKeyframes({}); |
| transitions[1].effect.setKeyframes([ |
| {left: '100px', top: '100px'}, |
| {left: '400px', top: '200px'}]) |
| getComputedStyle(div).left; |
| |
| // These updates form a single style change, equivalent to setting times and |
| // then setting left. |
| transitions[0].currentTime = 50 * MS_PER_SEC; |
| div.style.left ='100px'; |
| transitions[1].currentTime = 60 * MS_PER_SEC; |
| |
| // As there was a style change event, the new 'left' transition now has a |
| // higher value for the transition generation than the 'top' transition, |
| // reversing the order of the transitions returned by getAnimations. |
| const reversedTransition = div.getAnimations()[1]; |
| assert_equals(reversedTransition.transitionProperty, 'left', |
| "A reversed transition on left is produced"); |
| |
| assert_approx_equals( |
| reversedTransition.effect.getComputedTiming().activeDuration, |
| 50 * MS_PER_SEC, 1, |
| "The reversed transition has correctly reduced duration (based on the " + |
| "original left transition)."); |
| |
| assert_equals(reversedTransition.effect.getKeyframes()[0].left, '280px', |
| "The reversed transition gets its start value from the other " + |
| "transition controlling left"); |
| |
| }, "A transition with replaced keyframes animating nothing on a property " + |
| "being controlled by another modified transition exhibits normal " + |
| "reversing behavior and reverses from the other transition's current " + |
| "value."); |
| |
| test(t => { |
| const div = addDiv(t); |
| |
| // Initialize the style. |
| div.style.left = '100px'; |
| div.style.transition = 'left 100s linear'; |
| getComputedStyle(div).left; |
| |
| // Start the transtion. |
| div.style.left ='200px'; |
| const transition = div.getAnimations()[0]; |
| |
| // Update the keyframes and advance to the midpoint of the animation. |
| transition.effect.setKeyframes([ |
| { offset: 0, left: '-50px', composite: 'add', easing: 'linear'}]); |
| transition.currentTime = 50 * MS_PER_SEC; |
| assert_equals(getComputedStyle(div).left, '175px', |
| 'The computed style is based on the updated keyframes'); |
| |
| div.style.left = '100px'; |
| const reversedTransition = div.getAnimations()[0]; |
| assert_equals(reversedTransition.effect.getKeyframes()[0].left, '175px', |
| 'The start value matches the \'before change\' value'); |
| |
| }, 'A transition with replaced kefyrames and composite \'add\' exhibits ' + |
| 'normal reversing behavior, and the effect is not double counted when ' + |
| 'calculating the before change style'); |
| |
| </script> |