| <!DOCTYPE html> |
| <title>Element scroll promises are interrupted correctly</title> |
| <meta name="timeout" content="long"> |
| <meta name="viewport" content="width=device-width,initial-scale=1"> |
| <link rel="author" title="Mustaq Ahmed" href="mailto:mustaq@chromium.org"> |
| <link rel="help" href="https://drafts.csswg.org/cssom-view/#scrolling"> |
| <script src="/resources/testharness.js"></script> |
| <script src="/resources/testharnessreport.js"></script> |
| <script src="/dom/events/scrolling/scroll_support.js"></script> |
| <style> |
| .filler { height: 5000px } |
| |
| .scroller { |
| overflow: scroll; |
| height: 100px; |
| } |
| </style> |
| <div id="scroller" class="scroller"> |
| <div class="filler"></div> |
| <div class="filler"></div> |
| <div id="inner_scroller" class="scroller"> |
| <div class="filler"></div> |
| <div class="filler"></div> |
| </div> |
| </div> |
| <div id="other_scroller" class="scroller"> |
| <div class="filler"></div> |
| </div> |
| <script> |
| "use strict"; |
| |
| const scroller = document.getElementById("scroller"); |
| const inner_scroller = document.getElementById("inner_scroller"); |
| const other_scroller = document.getElementById("other_scroller"); |
| |
| const target_at_5000px = scroller.firstElementChild.nextElementSibling; |
| const innertarget_at_5000px = inner_scroller.lastElementChild; |
| |
| function resetScrollPositions() { |
| scroller.scrollTop = 0; |
| inner_scroller.scrollTop = 0; |
| other_scroller.scrollTop = 0; |
| assert_true(!scroller.scrollTop && !inner_scroller.scrollTop |
| && !other_scroller.scrollTop, "Sanity check initial position"); |
| } |
| |
| promise_setup(async () => { |
| await waitForCompositorReady(); |
| }); |
| |
| for (const scroll_method of ["scrollTo", "scrollBy", "scrollIntoView"]) { |
| promise_test(async () => { |
| resetScrollPositions(); |
| |
| let promise1 = scroll_method != "scrollIntoView" |
| ? scroller[scroll_method]({ top: 5000, behavior: "smooth" }) |
| : target_at_5000px.scrollIntoView({ behavior: "smooth" }); |
| |
| const pos2 = 7000; |
| scroller.scrollTop = pos2; |
| |
| assert_equals(scroller.scrollTop, pos2, "Position before promise wait"); |
| const result1 = await promise1; |
| assert_true(result1.interrupted, "Interruption bit in promise"); |
| |
| assert_equals(scroller.scrollTop, pos2, "Position after promise wait"); |
| }, `Element.${scroll_method} interrupted by a non-promise scroll`); |
| |
| promise_test(async () => { |
| resetScrollPositions(); |
| |
| const pos1 = 5000; |
| let promise1 = scroll_method != "scrollIntoView" |
| ? scroller[scroll_method]({ top: pos1, behavior: "smooth" }) |
| : target_at_5000px.scrollIntoView({ behavior: "smooth" }); |
| |
| other_scroller.scrollTop = 100; |
| |
| assert_not_equals(scroller.scrollTop, pos1, |
| "Position before promise wait"); |
| const result1 = await promise1; |
| assert_false(result1.interrupted, "Interruption bit in promise"); |
| assert_equals(scroller.scrollTop, pos1, "Position after promise wait"); |
| }, `Element.${scroll_method} uninterrupted by an unrelated non-promise scroll`); |
| } |
| |
| for (const interrupt_behavior of ["auto", "smooth"]) { |
| promise_test(async () => { |
| resetScrollPositions(); |
| |
| const pos1 = 5000; |
| let promise1 = scroller.scrollTo({ top: pos1, behavior: "smooth" }); |
| |
| const pos2 = 7000; |
| let promise2 = |
| scroller.scrollTo({ top: pos2, behavior: interrupt_behavior }); |
| |
| assert_not_equals(scroller.scrollTop, pos1, |
| "Position before first promise wait"); |
| const result1 = await promise1; |
| assert_true(result1.interrupted, "Interruption bit in first promise"); |
| assert_not_equals(scroller.scrollTop, pos1, |
| "Position after first promise wait"); |
| |
| const result2 = await promise2; |
| assert_false(result2.interrupted, "Interruption bit in second promise"); |
| assert_equals(scroller.scrollTop, pos2, |
| "Position after interrupting promise wait"); |
| }, `Element.scrollTo: interrupted by ${interrupt_behavior} scroll`); |
| |
| promise_test(async () => { |
| resetScrollPositions(); |
| |
| const pos1 = 5000; |
| let promise1 = scroller.scrollBy({ top: pos1, behavior: "smooth" }); |
| |
| const pos2 = 2000; |
| let promise2 = |
| scroller.scrollBy({ top: pos2, behavior: interrupt_behavior }); |
| |
| assert_not_equals(scroller.scrollTop, pos1, |
| "Position before first promise wait"); |
| const result1 = await promise1; |
| assert_true(result1.interrupted, "Interruption bit in first promise"); |
| assert_not_equals(scroller.scrollTop, pos1, |
| "Position after first promise wait"); |
| |
| const result2 = await promise2; |
| assert_false(result2.interrupted, "Interruption bit in second promise"); |
| assert_equals(scroller.scrollTop, pos2, |
| "Position after interrupting promise wait"); |
| }, `Element.scrollBy: interrupted by ${interrupt_behavior} scroll`); |
| |
| promise_test(async () => { |
| resetScrollPositions(); |
| |
| const pos1 = 5000; |
| let promise1 = target_at_5000px.scrollIntoView({ behavior: "smooth" }); |
| |
| const pos2 = 7000; |
| let promise2 = |
| scroller.scrollTo({ top: pos2, behavior: interrupt_behavior }); |
| |
| assert_not_equals(scroller.scrollTop, pos1, |
| "Position before first promise wait"); |
| const result1 = await promise1; |
| assert_true(result1.interrupted, "Interruption bit in first promise"); |
| assert_not_equals(scroller.scrollTop, pos1, |
| "Position after first promise wait"); |
| |
| const result2 = await promise2; |
| assert_false(result2.interrupted, "Interruption bit in second promise"); |
| assert_equals(scroller.scrollTop, pos2, |
| "Position after interrupting promise wait"); |
| }, `Element.scrollIntoView: interrupted by ${interrupt_behavior} scroll`); |
| } |
| |
| // Below are scrollIntoView tests involving nested scrollers. |
| promise_test(async () => { |
| resetScrollPositions(); |
| |
| let promise1 = target_at_5000px.scrollIntoView({ behavior: "smooth" }); |
| let promise2 = innertarget_at_5000px.scrollIntoView({ behavior: "smooth" }); |
| |
| const result1 = await promise1; |
| assert_true(result1.interrupted, "Interruption bit in first promise"); |
| assert_not_equals(scroller.scrollTop, 5000, |
| "Position after first promise wait"); |
| |
| const result2 = await promise2; |
| assert_false(result2.interrupted, "Interruption bit in second promise"); |
| assert_equals(scroller.scrollTop, 10000, |
| "Position after interrupting promise wait"); |
| assert_equals(inner_scroller.scrollTop, 5000, |
| "Inner-position after interrupting promise wait"); |
| }, `Element.scrollIntoView: interrupted by inner scroll`); |
| |
| promise_test(async () => { |
| resetScrollPositions(); |
| |
| let promise1 = innertarget_at_5000px.scrollIntoView({ behavior: "smooth" }); |
| let promise2 = target_at_5000px.scrollIntoView({ behavior: "smooth" }); |
| |
| const result1 = await promise1; |
| assert_true(result1.interrupted, "Interruption bit in first promise"); |
| assert_not_equals(scroller.scrollTop, 10000, |
| "Position after first promise wait"); |
| |
| const result2 = await promise2; |
| assert_false(result2.interrupted, "Interruption bit in second promise"); |
| assert_equals(scroller.scrollTop, 5000, |
| "Position after interrupting promise wait"); |
| }, `Element.scrollIntoView: interrupted by outer scroll`); |
| </script> |
