1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
|
<!doctype html>
<meta charset=utf-8>
<title>Scroll based animation: AnimationEffect.updateTiming</title>
<!-- Adapted to progressed based scroll animations from "wpt\web-animations\interfaces\AnimationEffect\updateTiming.html" -->
<link rel="help" href="https://drafts.csswg.org/web-animations-1/#dom-animationeffect-updatetiming">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/web-animations/testcommon.js"></script>
<script src="testcommon.js"></script>
<script src="/web-animations/resources/easing-tests.js"></script>
<script src="/web-animations/resources/timing-tests.js"></script>
<style>
.scroller {
overflow: auto;
height: 100px;
width: 100px;
will-change: transform;
}
.contents {
height: 1000px;
width: 100%;
}
</style>
<body>
<div id="log"></div>
<script>
'use strict';
// ------------------------------
// delay
// ------------------------------
promise_test(async t => {
const anim = createScrollLinkedAnimationWithTiming(t, {duration: 1000, delay: 200})
anim.play();
assert_equals(anim.effect.getTiming().delay, 200, 'initial delay 200');
assert_equals(anim.effect.getComputedTiming().delay, 200,
'getComputedTiming() initially delay 200');
anim.effect.updateTiming({ delay: 100 });
assert_equals(anim.effect.getTiming().delay, 100, 'set delay 100');
assert_equals(anim.effect.getComputedTiming().delay, 100,
'getComputedTiming() after set delay 100');
}, 'Allows setting the delay to a positive number');
test(t => {
const anim = createScrollLinkedAnimationWithTiming(t, {duration: 100, delay: -100})
anim.play();
anim.effect.updateTiming({ delay: -100 });
assert_equals(anim.effect.getTiming().delay, -100, 'set delay -100');
assert_equals(anim.effect.getComputedTiming().delay, -100,
'getComputedTiming() after set delay -100');
assert_percents_equal(anim.effect.getComputedTiming().endTime, 0,
'getComputedTiming().endTime after set delay -100');
}, 'Allows setting the delay to a negative number');
promise_test(async t => {
const anim = createScrollLinkedAnimationWithTiming(t, {duration: 100})
anim.play();
await anim.ready;
anim.effect.updateTiming({ delay: 100 });
assert_equals(anim.effect.getComputedTiming().progress, null);
assert_equals(anim.effect.getComputedTiming().currentIteration, null);
}, 'Allows setting the delay of an animation in progress: positive delay that'
+ ' causes the animation to be no longer in-effect');
promise_test(async t => {
const anim =
createScrollLinkedAnimationWithTiming(t, { fill: 'both', duration: 100 });
anim.play();
await anim.ready;
anim.effect.updateTiming({ delay: -50 });
assert_equals(anim.effect.getComputedTiming().progress, 0.5);
}, 'Allows setting the delay of an animation in progress: negative delay that'
+ ' seeks into the active interval');
promise_test(async t => {
const anim =
createScrollLinkedAnimationWithTiming(t, { fill: 'both', duration: 100 });
anim.play();
await anim.ready;
anim.effect.updateTiming({ delay: -100 });
assert_equals(anim.effect.getComputedTiming().progress, 1);
assert_equals(anim.effect.getComputedTiming().currentIteration, 0);
}, 'Allows setting the delay of an animation in progress: large negative delay'
+ ' that causes the animation to be finished');
for (const invalid of gBadDelayValues) {
test(t => {
const anim = createScrollLinkedAnimationWithTiming(t)
anim.play();
assert_throws_js(TypeError, () => {
anim.effect.updateTiming({ delay: invalid });
});
}, `Throws when setting invalid delay value: ${invalid}`);
}
// ------------------------------
// endDelay
// ------------------------------
promise_test(async t => {
const anim = createScrollLinkedAnimationWithTiming(t, { duration: 2000 });
anim.play();
await anim.ready;
anim.effect.updateTiming({ endDelay: 123.45 });
assert_time_equals_literal(anim.effect.getTiming().endDelay, 123.45,
'set endDelay 123.45');
assert_time_equals_literal(anim.effect.getComputedTiming().endDelay, 123.45,
'getComputedTiming() after set endDelay 123.45');
}, 'Allows setting the endDelay to a positive number');
promise_test(async t => {
const anim = createScrollLinkedAnimationWithTiming(t, { duration: 2000 });
anim.play();
await anim.ready;
anim.effect.updateTiming({ endDelay: -1000 });
assert_equals(anim.effect.getTiming().endDelay, -1000, 'set endDelay -1000');
assert_equals(anim.effect.getComputedTiming().endDelay, -1000,
'getComputedTiming() after set endDelay -1000');
}, 'Allows setting the endDelay to a negative number');
promise_test(async t => {
const anim = createScrollLinkedAnimationWithTiming(t, { duration: 2000 });
anim.play();
await anim.ready;
assert_throws_js(TypeError, () => {
anim.effect.updateTiming({ endDelay: Infinity });
});
}, 'Throws when setting the endDelay to infinity');
promise_test(async t => {
const anim = createScrollLinkedAnimationWithTiming(t, { duration: 2000 });
anim.play();
await anim.ready;
assert_throws_js(TypeError, () => {
anim.effect.updateTiming({ endDelay: -Infinity });
});
}, 'Throws when setting the endDelay to negative infinity');
// ------------------------------
// fill
// ------------------------------
for (const fill of ['none', 'forwards', 'backwards', 'both']) {
test(t => {
const anim = createScrollLinkedAnimationWithTiming(t, { duration: 100 })
anim.play();
anim.effect.updateTiming({ fill });
assert_equals(anim.effect.getTiming().fill, fill, 'set fill ' + fill);
assert_equals(anim.effect.getComputedTiming().fill, fill,
'getComputedTiming() after set fill ' + fill);
}, `Allows setting the fill to '${fill}'`);
}
// ------------------------------
// iterationStart
// ------------------------------
promise_test(async t => {
const anim = createScrollLinkedAnimationWithTiming(t, { iterationStart: 0.2,
iterations: 1,
fill: 'both',
duration: 100,
delay: 1 })
anim.play();
await anim.ready;
anim.effect.updateTiming({ iterationStart: 2.5 });
assert_time_equals_literal(anim.effect.getComputedTiming().progress, 0.5);
assert_equals(anim.effect.getComputedTiming().currentIteration, 2);
}, 'Allows setting the iterationStart of an animation in progress:'
+ ' backwards-filling');
promise_test(async t => {
const anim = createScrollLinkedAnimationWithTiming(t, { iterationStart: 0.2,
iterations: 1,
fill: 'both',
duration: 100,
delay: 0 })
anim.play();
await anim.ready;
anim.effect.updateTiming({ iterationStart: 2.5 });
assert_time_equals_literal(anim.effect.getComputedTiming().progress, 0.5);
assert_equals(anim.effect.getComputedTiming().currentIteration, 2);
}, 'Allows setting the iterationStart of an animation in progress:'
+ ' active phase');
promise_test(async t => {
const anim = createScrollLinkedAnimationWithTiming(t, { iterationStart: 0.3,
iterations: 1,
fill: 'both',
duration: 200,
delay: 0 })
anim.play();
await anim.ready;
assert_percents_equal(anim.currentTime, 0);
assert_percents_equal(anim.effect.getComputedTiming().localTime, 0,
"localTime");
assert_time_equals_literal(anim.effect.getComputedTiming().progress, 0.3);
assert_equals(anim.effect.getComputedTiming().currentIteration, 0);
anim.finish();
assert_percents_equal(anim.currentTime, 100);
assert_percents_equal(anim.effect.getComputedTiming().localTime, 100,
"localTime");
assert_time_equals_literal(anim.effect.getComputedTiming().progress, 0.3);
assert_equals(anim.effect.getComputedTiming().currentIteration, 1);
anim.effect.updateTiming({ iterationStart: 2.5 });
assert_percents_equal(anim.currentTime, 100);
assert_percents_equal(anim.effect.getComputedTiming().localTime, 100,
"localTime");
assert_time_equals_literal(anim.effect.getComputedTiming().progress, 0.5);
assert_equals(anim.effect.getComputedTiming().currentIteration, 3);
}, 'Allows setting the iterationStart of an animation in progress:'
+ ' forwards-filling');
for (const invalid of gBadIterationStartValues) {
test(t => {
const anim = createScrollLinkedAnimationWithTiming(t)
anim.play();
assert_throws_js(TypeError, () => {
anim.effect.updateTiming({ iterationStart: invalid });
}, `setting ${invalid}`);
}, `Throws when setting invalid iterationStart value: ${invalid}`);
}
// ------------------------------
// iterations
// ------------------------------
test(t => {
const anim = createScrollLinkedAnimationWithTiming(t, { duration: 2000 });
anim.play();
anim.effect.updateTiming({ iterations: 2 });
assert_equals(anim.effect.getTiming().iterations, 2, 'set duration 2');
assert_equals(anim.effect.getComputedTiming().iterations, 2,
'getComputedTiming() after set iterations 2');
}, 'Allows setting iterations to a double value');
test(t => {
const anim = createScrollLinkedAnimationWithTiming(t, { duration: 2000 });
anim.play();
assert_throws_js(TypeError, () => {
anim.effect.updateTiming({ iterations: Infinity });
}, "test");
}, `Throws when setting iterations to Infinity`);
// progress based animations behave a bit differently than time based animations
// when changing iterations.
test(t => {
const anim =
createScrollLinkedAnimationWithTiming(
t, { duration: 100000, fill: 'both' });
anim.play();
anim.finish();
assert_equals(anim.effect.getComputedTiming().progress, 1,
'progress when animation is finished');
assert_percents_equal(anim.effect.getComputedTiming().duration, 100,
'duration when animation is finished');
assert_equals(anim.effect.getComputedTiming().currentIteration, 0,
'current iteration when animation is finished');
anim.effect.updateTiming({ iterations: 2 });
assert_equals(anim.effect.getComputedTiming().progress, 1,
'progress after adding an iteration');
assert_percents_equal(anim.effect.getComputedTiming().duration, 50,
'duration after adding an iteration');
assert_equals(anim.effect.getComputedTiming().currentIteration, 1,
'current iteration after adding an iteration');
anim.effect.updateTiming({ iterations: 4 });
assert_equals(anim.effect.getComputedTiming().progress, 1,
'progress after setting iterations to 4');
assert_percents_equal(anim.effect.getComputedTiming().duration, 25,
'duration after setting iterations to 4');
assert_equals(anim.effect.getComputedTiming().currentIteration, 3,
'current iteration after setting iterations to 4');
anim.effect.updateTiming({ iterations: 0 });
assert_equals(anim.effect.getComputedTiming().progress, 0,
'progress after setting iterations to zero');
assert_percents_equal(anim.effect.getComputedTiming().duration, 0,
'duration after setting iterations to zero');
assert_equals(anim.effect.getComputedTiming().currentIteration, 0,
'current iteration after setting iterations to zero');
}, 'Allows setting the iterations of an animation in progress');
// Added test for checking duration "auto"
test(t => {
const anim = createScrollLinkedAnimationWithTiming(t, { fill: 'both' });
anim.play();
anim.finish();
assert_equals(anim.effect.getComputedTiming().progress, 1,
'progress when animation is finished');
assert_percents_equal(anim.effect.getComputedTiming().duration, 100,
'duration when animation is finished');
assert_equals(anim.effect.getComputedTiming().currentIteration, 0,
'current iteration when animation is finished');
anim.effect.updateTiming({ iterations: 2 });
assert_equals(anim.effect.getComputedTiming().progress, 1,
'progress after adding an iteration');
assert_percents_equal(anim.effect.getComputedTiming().duration, 50,
'duration after adding an iteration');
assert_equals(anim.effect.getComputedTiming().currentIteration, 1,
'current iteration after adding an iteration');
anim.effect.updateTiming({ iterations: 4 });
assert_equals(anim.effect.getComputedTiming().progress, 1,
'progress after setting iterations to 4');
assert_percents_equal(anim.effect.getComputedTiming().duration, 25,
'duration after setting iterations to 4');
assert_equals(anim.effect.getComputedTiming().currentIteration, 3,
'current iteration after setting iterations to 4');
anim.effect.updateTiming({ iterations: 0 });
assert_equals(anim.effect.getComputedTiming().progress, 0,
'progress after setting iterations to zero');
assert_percents_equal(anim.effect.getComputedTiming().duration, 0,
'duration after setting iterations to zero');
assert_equals(anim.effect.getComputedTiming().currentIteration, 0,
'current iteration after setting iterations to zero');
}, 'Allows setting the iterations of an animation in progress with duration ' +
'"auto"');
// ------------------------------
// duration
// ------------------------------
// adapted for progress based animations
const gGoodDurationValuesForProgressBased = [
// until duration returns a CSSNumberish which can handle percentages, 100%
// will be represented as 100
{ specified: 123.45, computed: 100 },
{ specified: 'auto', computed: 100 },
{ specified: Infinity, computed: 100 },
];
for (const duration of gGoodDurationValuesForProgressBased) {
test(t => {
const anim = createScrollLinkedAnimationWithTiming(t, 2000);
anim.play();
anim.effect.updateTiming({ duration: duration.specified });
if (typeof duration.specified === 'number') {
assert_time_equals_literal(anim.effect.getTiming().duration,
duration.specified,
'Updates specified duration');
} else {
assert_equals(anim.effect.getTiming().duration, duration.specified,
'Updates specified duration');
}
assert_percents_equal(anim.effect.getComputedTiming().duration,
duration.computed,
'Updates computed duration');
}, `Allows setting the duration to ${duration.specified}`);
}
// adapted for progress based animations
const gBadDurationValuesForProgressBased = [
-1, NaN, -Infinity, 'abc', '100'
];
for (const invalid of gBadDurationValuesForProgressBased) {
test(t => {
assert_throws_js(TypeError, () => {
const anim = createScrollLinkedAnimationWithTiming(t, { duration: invalid })
anim.play();
});
}, 'Throws when setting invalid duration: '
+ (typeof invalid === 'string' ? `"${invalid}"` : invalid));
}
test(t => {
const anim =
createScrollLinkedAnimationWithTiming(
t, { duration: 100000, fill: 'both' });
anim.play();
anim.finish();
assert_equals(anim.effect.getComputedTiming().progress, 1,
'progress when animation is finished');
anim.effect.updateTiming({ duration: anim.effect.getTiming().duration * 2 });
assert_time_equals_literal(anim.effect.getComputedTiming().progress, 1,
'progress after doubling the duration');
anim.effect.updateTiming({ duration: 0 });
assert_equals(anim.effect.getComputedTiming().progress, 1,
'progress after setting duration to zero');
anim.effect.updateTiming({ duration: 'auto' });
assert_equals(anim.effect.getComputedTiming().progress, 1,
'progress after setting duration to \'auto\'');
}, 'Allows setting the duration of an animation in progress');
promise_test(t => {
const anim =
createScrollLinkedAnimationWithTiming(
t, { duration: 100000, fill: 'both' });
anim.play();
return anim.ready.then(() => {
const originalStartTime = anim.startTime;
const originalCurrentTime = anim.currentTime;
assert_percents_equal(
anim.effect.getComputedTiming().duration,
100,
'Initial duration should be as set on KeyframeEffect'
);
anim.effect.updateTiming({ duration: 200000 });
assert_percents_equal(
anim.effect.getComputedTiming().duration,
100,
'Effect duration should remain at 100% for progress based animations'
);
assert_percents_equal(anim.startTime, originalStartTime,
'startTime should be unaffected by changing effect ' +
'duration');
assert_percents_equal(anim.currentTime, originalCurrentTime,
'currentTime should be unaffected by changing ' +
'effect duration');
});
}, 'Allows setting the duration of an animation in progress such that the' +
' the start and current time do not change');
// ------------------------------
// direction
// ------------------------------
test(t => {
const anim = createScrollLinkedAnimationWithTiming(t, { duration: 2000 });
anim.play();
const directions = ['normal', 'reverse', 'alternate', 'alternate-reverse'];
for (const direction of directions) {
anim.effect.updateTiming({ direction: direction });
assert_equals(anim.effect.getTiming().direction, direction,
`set direction to ${direction}`);
}
}, 'Allows setting the direction to each of the possible keywords');
promise_test(async t => {
const anim =
createScrollLinkedAnimationWithTiming(
t, { duration: 10000, direction: 'normal' });
const scroller = anim.timeline.source;
const maxScroll = scroller.scrollHeight - scroller.clientHeight;
anim.play();
await anim.ready;
scroller.scrollTop = maxScroll * 0.07
await waitForNextFrame();
assert_time_equals_literal(anim.effect.getComputedTiming().progress, 0.07,
'progress before updating direction');
anim.effect.updateTiming({ direction: 'reverse' });
assert_time_equals_literal(anim.effect.getComputedTiming().progress, 0.93,
'progress after updating direction');
}, 'Allows setting the direction of an animation in progress from \'normal\' ' +
'to \'reverse\'');
promise_test(async t => {
const anim =
createScrollLinkedAnimationWithTiming(
t, { duration: 10000, direction: 'normal' });
anim.play();
await anim.ready;
assert_equals(anim.effect.getComputedTiming().progress, 0,
'progress before updating direction');
anim.effect.updateTiming({ direction: 'reverse' });
assert_equals(anim.effect.getComputedTiming().progress, 1,
'progress after updating direction');
}, 'Allows setting the direction of an animation in progress from \'normal\' to'
+ ' \'reverse\' while at start of active interval');
promise_test(async t => {
const anim = createScrollLinkedAnimationWithTiming(t, { fill: 'backwards',
duration: 10000,
delay: 10000,
direction: 'normal' });
anim.play();
await anim.ready;
assert_equals(anim.effect.getComputedTiming().progress, 0,
'progress before updating direction');
anim.effect.updateTiming({ direction: 'reverse' });
assert_equals(anim.effect.getComputedTiming().progress, 1,
'progress after updating direction');
}, 'Allows setting the direction of an animation in progress from \'normal\' to'
+ ' \'reverse\' while filling backwards');
promise_test(async t => {
const anim = createScrollLinkedAnimationWithTiming(t, { iterations: 2,
duration: 10000,
direction: 'normal' });
const scroller = anim.timeline.source;
const maxScroll = scroller.scrollHeight - scroller.clientHeight;
anim.play();
await anim.ready;
scroller.scrollTop = maxScroll * 0.17 // 34% through first iteration
await waitForNextFrame();
assert_time_equals_literal(anim.effect.getComputedTiming().progress, 0.34,
'progress before updating direction');
anim.effect.updateTiming({ direction: 'alternate' });
assert_time_equals_literal(anim.effect.getComputedTiming().progress, 0.34,
'progress after updating direction');
}, 'Allows setting the direction of an animation in progress from \'normal\' to'
+ ' \'alternate\'');
promise_test(async t => {
const anim = createScrollLinkedAnimationWithTiming(t, { iterations: 2,
duration: 10000,
direction: 'alternate' });
const scroller = anim.timeline.source;
const maxScroll = scroller.scrollHeight - scroller.clientHeight;
anim.play();
await anim.ready;
scroller.scrollTop = maxScroll * 0.17
await waitForNextFrame();
// anim.currentTime = 17000; // 34% through first iteration
assert_time_equals_literal(anim.effect.getComputedTiming().progress, 0.34,
'progress before updating direction');
anim.effect.updateTiming({ direction: 'alternate-reverse' });
assert_time_equals_literal(anim.effect.getComputedTiming().progress, 0.66,
'progress after updating direction');
}, 'Allows setting the direction of an animation in progress from \'alternate\''
+ ' to \'alternate-reverse\'');
// ------------------------------
// easing
// ------------------------------
async function assert_progress(animation, scrollPercent, easingFunction) {
const scroller = animation.timeline.source;
const maxScroll = scroller.scrollHeight - scroller.clientHeight;
scroller.scrollTop = maxScroll * scrollPercent
await waitForNextFrame();
assert_approx_equals(animation.effect.getComputedTiming().progress,
easingFunction(scrollPercent),
0.01,
'The progress of the animation should be approximately'
+ ` ${easingFunction(scrollPercent)} at ${scrollPercent}%`);
}
for (const options of gEasingTests) {
promise_test(async t => {
const anim = createScrollLinkedAnimationWithTiming(t, { duration: 100000,
fill: 'forwards' });
anim.play();
anim.effect.updateTiming({ easing: options.easing });
assert_equals(anim.effect.getTiming().easing,
options.serialization || options.easing);
const easing = options.easingFunction;
await assert_progress(anim, 0, easing);
await assert_progress(anim, 0.25, easing);
await assert_progress(anim, 0.5, easing);
await assert_progress(anim, 0.75, easing);
await assert_progress(anim, 1, easing);
}, `Allows setting the easing to a ${options.desc}`);
}
for (const easing of gRoundtripEasings) {
test(t => {
const anim = createScrollLinkedAnimationWithTiming(t);
anim.play();
anim.effect.updateTiming({ easing: easing });
assert_equals(anim.effect.getTiming().easing, easing);
}, `Updates the specified value when setting the easing to '${easing}'`);
}
// Because of the delay being so large, this progress based animation is always
// in the finished state with progress 1. Included here because it is in the
// original test file for time based animations.
promise_test(async t => {
const delay = 1000000;
const anim = createScrollLinkedAnimationWithTiming(t,
{ duration: 1000000, fill: 'both', delay: delay, easing: 'steps(2, start)' });
const scroller = anim.timeline.source;
const maxScroll = scroller.scrollHeight - scroller.clientHeight;
anim.play();
await anim.ready;
anim.effect.updateTiming({ easing: 'steps(2, end)' });
assert_equals(anim.effect.getComputedTiming().progress, 0,
'easing replace to steps(2, end) at before phase');
scroller.scrollTop = maxScroll * 0.875
await waitForNextFrame();
assert_equals(anim.effect.getComputedTiming().progress, 0.5,
'change currentTime to active phase');
anim.effect.updateTiming({ easing: 'steps(2, start)' });
assert_equals(anim.effect.getComputedTiming().progress, 1,
'easing replace to steps(2, start) at active phase');
scroller.scrollTop = maxScroll * 1.25
await waitForNextFrame();
anim.effect.updateTiming({ easing: 'steps(2, end)' });
assert_equals(anim.effect.getComputedTiming().progress, 1,
'easing replace to steps(2, end) again at after phase');
}, 'Allows setting the easing of an animation in progress');
</script>
</body>
|
