| <!DOCTYPE html> |
| <title>CSS Transitions Test: Cascading @starting-style</title> |
| <link rel="help" href="https://drafts.csswg.org/css-transitions-2/#defining-before-change-style-the-starting-style-rule"> |
| <script src="/resources/testharness.js"></script> |
| <script src="/resources/testharnessreport.js"></script> |
| <script src="/css/css-transitions/support/helper.js"></script> |
| <style> |
| .color-transition { |
| transition: color 100s steps(2, start); |
| } |
| |
| @starting-style { |
| #t1 { color: red; } |
| } |
| #t1 { color: green; } |
| |
| @starting-style { |
| div#t2 { color: lime; } |
| } |
| #t2 { color: green; } |
| |
| #t3 { color: green; } |
| @starting-style { |
| #t3 { color: red; } |
| } |
| #t3 > div { color: green; } |
| |
| #t4 { color: green; } |
| #t4[hidden] { color: red; } |
| #t4 > div { color: lime; } |
| @starting-style { |
| #t4 > div { color: inherit; } |
| } |
| |
| #t5 { color: green; } |
| @starting-style { |
| #t5 { color: black; } |
| } |
| #t5 > div { color: lime; } |
| @starting-style { |
| #t5 > div { color: inherit; } |
| } |
| |
| #t6 { color: green; } |
| @starting-style { |
| #t6 { color: black; } |
| } |
| #t6 .color-transition { color: lime; } |
| @starting-style { |
| #t6 .color-transition { color: inherit; } |
| } |
| |
| </style> |
| <div id="t1" hidden class="color-transition"></div> |
| <div id="t2" hidden class="color-transition"></div> |
| <div id="t3" hidden> |
| <div class="color-transition"></div> |
| </div> |
| <div id="t4" hidden> |
| <div class="color-transition"></div> |
| </div> |
| <div id="t5" hidden class="color-transition"> |
| <div class="color-transition"></div> |
| </div> |
| <div id="t6" hidden class="color-transition"> |
| <div> |
| <div class="color-transition"></div> |
| </div> |
| </div> |
| <script> |
| setup(() => { |
| assert_true(supportsStartingStyle(), "Prerequisite: @starting-style parses"); |
| }); |
| |
| promise_test(async t => { |
| await waitForAnimationFrames(2); |
| t1.removeAttribute("hidden"); |
| await waitForAnimationFrames(2); |
| assert_equals(getComputedStyle(t1).color, "rgb(0, 128, 0)", |
| "No transition of color"); |
| }, "Overridden @starting-style - order of appearance"); |
| |
| promise_test(async t => { |
| t2.removeAttribute("hidden"); |
| await waitForAnimationFrames(2); |
| assert_equals(getComputedStyle(t2).color, "rgb(0, 192, 0)", |
| "Transition of color"); |
| }, "@starting-style with higher specificity"); |
| |
| promise_test(async t => { |
| t3.removeAttribute("hidden"); |
| await waitForAnimationFrames(2); |
| assert_equals(getComputedStyle(t3.firstElementChild).color, "rgb(0, 128, 0)", |
| "No transition of color"); |
| }, "Starting style does not inherit from parent starting style"); |
| |
| promise_test(async t => { |
| assert_equals(getComputedStyle(t4).color, "rgb(255, 0, 0)", |
| "Parent transition started"); |
| t4.removeAttribute("hidden"); |
| await waitForAnimationFrames(2); |
| assert_equals(getComputedStyle(t4).color, "rgb(0, 128, 0)", |
| "Parent changed to green"); |
| assert_equals(getComputedStyle(t4.firstElementChild).color, "rgb(0, 192, 0)", |
| "Transition started from parent's after-change style color"); |
| }, "Starting style inheriting from parent's after-change style"); |
| |
| promise_test(async t => { |
| t5.removeAttribute("hidden"); |
| await waitForAnimationFrames(2); |
| assert_equals(getComputedStyle(t5).color, "rgb(0, 64, 0)", |
| "Parent transition started"); |
| assert_equals(getComputedStyle(t5.firstElementChild).color, "rgb(0, 192, 0)", |
| "Transition started from parent's after-change style color"); |
| }, "Starting style inheriting from parent's after-change style while parent transitioning"); |
| |
| promise_test(async t => { |
| t6.removeAttribute("hidden"); |
| await waitForAnimationFrames(2); |
| assert_equals(getComputedStyle(t6).color, "rgb(0, 64, 0)", |
| "Parent transition started"); |
| assert_equals(getComputedStyle(t6.firstElementChild).color, "rgb(0, 64, 0)", |
| "Inherited effect from parent transition"); |
| assert_equals(getComputedStyle(t6.firstElementChild.firstElementChild).color, "rgb(0, 192, 0)", |
| "Transition started from parent's after-change style color, inherited from ancestors after-change color"); |
| }, "Starting style inheriting from parent's after-change style while ancestor is transitioning"); |
| |
| </script> |
