| <!DOCTYPE html> |
| <meta charset="utf-8"> |
| <style> |
| |
| :root { |
| --custom-color: blue; |
| } |
| |
| .target { |
| width: 100px; |
| height: 100px; |
| background: linear-gradient(var(--custom-color), green); |
| transition-duration: 1s; |
| } |
| |
| .target.transition { |
| margin-left: 100px; |
| } |
| |
| </style> |
| <body> |
| <script src="../resources/testharness.js"></script> |
| <script src="../resources/testharnessreport.js"></script> |
| <script> |
| |
| 'use strict'; |
| |
| promise_test(async test => { |
| const target = document.body.appendChild(document.createElement("div")); |
| target.classList.add("target"); |
| |
| await new Promise(requestAnimationFrame); |
| target.classList.add("transition"); |
| |
| const animations = target.getAnimations(); |
| assert_equals(animations.length, 1, "There is only one animation applied to the target."); |
| assert_true(animations[0] instanceof CSSTransition, "The single animation applied to the target is a CSS transition."); |
| assert_equals(animations[0].transitionProperty, "margin-left", "The single CSS transition applied to the target is for the margin-left property."); |
| }, `An element with a background-image set to a CSS gradient with a stop color set by a custom property does not yield a background-image transition when another CSS property changes.`); |
| |
| </script> |
| </body> |
