KeyframeEffect-getKeyframes-width-and-height-transition.tentative.html

Enable keyboard shortcuts

This WPT test may be referenced by the following Test IDs:
- /css/css-transitions/KeyframeEffect-getKeyframes-width-and-height-transition.tentative.html - WPT Dashboard Interop Dashboard

<!doctype html>

<meta charset=utf-8>

<title>AnimationEffect.getKeyframes() for CSS transitions of the width and height properties</title>

<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>

<style>

.animated-div {

  width: 100px;

  height: 100px;

</style>

<div id="log"></div>

<script>

'use strict';

test(t => {

  const div = addDiv(t, { class: 'animated-div' });

  div.style.transition = 'width 10s';

  getComputedStyle(div).width;

  div.style.width = '200px';

  const keyframes = div.getAnimations()[0].effect.getKeyframes();

  assert_equals(keyframes[0].width, "100px", 'from keyframe value');

  assert_equals(keyframes[1].width, "200px", 'to keyframe value');

}, 'getKeyframes() output for a width transition');

test(t => {

  const div = addDiv(t, { class: 'animated-div' });

  div.style.transition = 'height 10s';

  getComputedStyle(div).height;

  div.style.height = '200px';

  const keyframes = div.getAnimations()[0].effect.getKeyframes();

  assert_equals(keyframes[0].height, "100px", 'from keyframe value');

  assert_equals(keyframes[1].height, "200px", 'to keyframe value');

}, 'getKeyframes() output for a height transition');

</script>