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Commit 91310914 authored by Stephen McGruer's avatar Stephen McGruer Committed by Commit Bot
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Port another set of sticky tests to JS rather than reftests 

Change-Id: Idf6dd882d2d50b1ec349f245d76717553ee266b3
Reviewed-on: https://chromium-review.googlesource.com/882002Reviewed-by: default avatarRobert Flack <flackr@chromium.org>
Commit-Queue: Stephen McGruer <smcgruer@chromium.org>
Cr-Commit-Position: refs/heads/master@{#532966}
parent 665cdea2
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third_party/WebKit/LayoutTests/external/wpt/css/css-position/position-sticky-inflow-position-ref.html deleted 100644 → 0
View file @ 665cdea2
<!DOCTYPE html>
<title>Reference for position:sticky elements should not affect the flow position of other elements</title>
<style>
.scroller {
height: 200px;
width: 100px;
overflow-y: scroll;
margin-bottom: 15px;
}
.sticky {
background-color: green;
}
.box {
height: 50px;
width: 50px;
}
.before {
background-color: fuchsia;
}
.after {
background-color: orange;
}
.padding {
height: 450px;
}
</style>
<div class="scroller">
<div class="before box"></div>
<div class="box"></div>
<div class="after box"></div>
<div class="sticky box"></div>
<div class="padding"></div>
</div>
<div>You should see a fuchsia box, a one-box gap, an orange box, and then a green box above.</div>
third_party/WebKit/LayoutTests/external/wpt/css/css-position/position-sticky-inflow-position.html
View file @ 91310914
<!DOCTYPE html> <!DOCTYPE html>
<title>position:sticky elements should not affect the flow position of other elements</title> <title>position:sticky elements should not affect the flow position of other elements</title>
<link rel="match" href="position-sticky-inflow-position-ref.html" />
<link rel="help" href="https://www.w3.org/TR/css-position-3/#sticky-pos" /> <link rel="help" href="https://www.w3.org/TR/css-position-3/#sticky-pos" />
<meta name="assert" content="This test checks that position:sticky elements do not affect the flow position of other elements" /> <meta name="assert" content="This test checks that position:sticky elements do not affect the flow position of other elements" />
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<style> <style>
.scroller { .scroller {
position: relative;
height: 200px; height: 200px;
width: 100px; width: 100px;
overflow-y: scroll; overflow: scroll;
margin-bottom: 15px;
} }
.sticky { #sticky {
background-color: green; background-color: green;
position: sticky; position: sticky;
top: 150px; top: 150px;
} }
.box { #before {
height: 50px;
width: 50px;
}
.before {
background-color: fuchsia; background-color: fuchsia;
} }
.after { #after {
background-color: orange; background-color: orange;
} }
.box {
height: 50px;
width: 50px;
}
.padding { .padding {
height: 500px; height: 500px;
} }
</style> </style>
<div class="scroller"> <div class="scroller">
<div class="before box"></div> <div id="before" class="box"></div>
<div class="sticky box"></div> <div id="sticky" class="box"></div>
<div class="after box"></div> <div id="after" class="box"></div>
<div class="padding"></div> <div class="padding"></div>
</div> </div>
<div>You should see a fuchsia box, a one-box gap, an orange box, and then a green box above.</div> <script>
test(() => {
// The sticky element is pushed to be stuck 150 pixels from the top.
assert_equals(sticky.offsetTop, 150);
// Neither 'before' or 'after' should be affected by the change in the sticky
// element's location.
assert_equals(before.offsetTop, 0);
assert_equals(after.offsetTop, before.clientHeight + sticky.clientHeight);
}, 'sticky offset should not affect the position of other elements.');
</script>
third_party/WebKit/LayoutTests/external/wpt/css/css-position/position-sticky-margins-ref.html deleted 100644 → 0
View file @ 665cdea2
<!DOCTYPE html>
<title>Reference for position:sticky elements should properly interact with margins</title>
<style>
.group {
display: inline-block;
position: relative;
width: 180px;
height: 400px;
}
.scroller {
width: 150px;
height: 300px;
overflow-y: scroll;
overflow-x: hidden;
}
.indicator {
position: relative;
background-color: green;
margin: 15px;
}
.box {
width: 100px;
height: 100px;
}
.padding {
height: 385px;
}
</style>
<script>
window.addEventListener('load', function() {
document.getElementById('scroller1').scrollTop = 0;
document.getElementById('scroller2').scrollTop = 60;
document.getElementById('scroller3').scrollTop = 120;
});
</script>
<div class="group">
<div id="scroller1" class="scroller">
<div class="indicator box" style="top: 0;"></div>
<div class="padding"></div>
</div>
</div>
<div class="group">
<div id="scroller2" class="scroller">
<div class="indicator box" style="top: 50px;"></div>
<div class="padding"></div>
</div>
</div>
<div class="group">
<div id="scroller3" class="scroller">
<div class="indicator box" style="top: 85px;"></div>
<div class="padding"></div>
</div>
</div>
<div>You should see three green boxes above. No red should be visible.</div>
third_party/WebKit/LayoutTests/external/wpt/css/css-position/position-sticky-margins.html
View file @ 91310914
<!DOCTYPE html> <!DOCTYPE html>
<title>position:sticky elements should properly interact with margins</title> <title>position:sticky elements should properly interact with margins</title>
<link rel="match" href="position-sticky-margins-ref.html" />
<link rel="help" href="https://www.w3.org/TR/css-position-3/#sticky-pos" /> <link rel="help" href="https://www.w3.org/TR/css-position-3/#sticky-pos" />
<meta name="assert" content="position:sticky elements should ignore margins when sticking, but consider them when making sure sticky elements do not escape their containing block" /> <meta name="assert" content="position:sticky elements should ignore margins when sticking, but consider them when making sure sticky elements do not escape their containing block" />
<style> <script src="/resources/testharness.js"></script>
.group { <script src="/resources/testharnessreport.js"></script>
display: inline-block;
position: relative;
width: 180px;
height: 400px;
}
.scroller { <script src="resources/sticky-util.js"></script>
position: relative;
width: 150px;
height: 300px;
overflow-y: scroll;
overflow-x: hidden;
}
.holder { <body></body>
width: 130px;
height: 200px;
}
.sticky {
position: sticky;
background-color: green;
top: 5px;
margin: 15px;
}
.indicator {
left: 15px;
position: absolute;
background-color: red;
}
.box {
width: 100px;
height: 100px;
}
.padding {
height: 300px;
}
</style>
<script> <script>
window.addEventListener('load', function() { test(() => {
document.getElementById('scroller1').scrollTop = 0; const elements = setupStickyTest('top', 50);
document.getElementById('scroller2').scrollTop = 60; elements.sticky.style.margin = '15px';
document.getElementById('scroller3').scrollTop = 120; elements.scroller.scrollTop = 100;
}); assert_equals(elements.sticky.offsetTop,
elements.container.offsetTop + elements.filler.clientHeight + 15);
}, 'Before sticking, the margin should be obeyed.');
test(() => {
const elements = setupStickyTest('top', 50);
elements.sticky.style.margin = '15px';
elements.scroller.scrollTop = 200;
// This math cancels to sticky.offsetTop == (scroller.scrollTop + 50), but
// for clarity the calculations are left explicit.
const nonStickyTopY = elements.container.offsetTop +
elements.filler.clientHeight;
const targetTopY = elements.scroller.scrollTop + 50;
const stickyOffset = targetTopY - nonStickyTopY;
assert_equals(elements.sticky.offsetTop, nonStickyTopY + stickyOffset);
}, 'Whilst stuck, the margin is irrelevant.');
test(() => {
const elements = setupStickyTest('top', 50);
elements.sticky.style.margin = '15px';
elements.scroller.scrollTop = 300;
const maxOffsetInContainer = elements.container.offsetTop +
elements.container.clientHeight - elements.sticky.clientHeight;
assert_equals(elements.sticky.offsetTop, maxOffsetInContainer - 15);
}, 'The margin is taken into account when making sure the sticky element ' +
'does not escape its container');
</script> </script>
<!-- Before sticking, the margin should be obeyed. -->
<div class="group">
<div id="scroller1" class="scroller">
<div class="indicator box" style="top: 15px;"></div>
<div class="holder">
<div class="sticky box"></div>
</div>
<div class="padding"></div>
</div>
</div>
<!-- Whilst stuck, the margin is irrelevant. -->
<div class="group">
<div id="scroller2" class="scroller">
<div class="indicator box" style="top: 65px;"></div>
<div class="holder">
<div class="sticky box"></div>
</div>
<div class="padding"></div>
</div>
</div>
<!-- The margin does count when making sure the sticky element does not escape
its containing block. -->
<div class="group">
<div id="scroller3" class="scroller">
<div class="indicator box" style="top: 100px;"></div>
<div class="holder">
<div class="sticky box"></div>
</div>
<div class="padding"></div>
</div>
</div>
<div>You should see three green boxes above. No red should be visible.</div>
third_party/WebKit/LayoutTests/external/wpt/css/css-position/position-sticky-overflow-padding-ref.html deleted 100644 → 0
View file @ 665cdea2
<!DOCTYPE html>
<title>Reference for position:sticky elements should respect padding on their ancestor overflow element</title>
<style>
.group {
display: inline-block;
position: relative;
width: 150px;
height: 250px;
}
.scroller {
padding: 20px 0;
position: relative;
width: 100px;
height: 200px;
overflow-x: hidden;
overflow-y: auto;
}
.contents {
height: 500px;
}
.indicator {
background-color: green;
position: absolute;
left: 0;
}
.box {
width: 100%;
height: 100px;
}
</style>
<script>
window.addEventListener('load', function() {
document.getElementById('scroller1').scrollTop = 50;
document.getElementById('scroller2').scrollTop = 175;
document.getElementById('scroller3').scrollTop = 220;
});
</script>
<div class="group">
<div id="scroller1" class="scroller">
<div class="contents">
<div class="indicator box" style="top: 170px;"></div>
</div>
</div>
</div>
<div class="group">
<div id="scroller2" class="scroller">
<div class="contents">
<div class="indicator box" style="top: 195px;"></div>
</div>
</div>
</div>
<div class="group">
<div id="scroller3" class="scroller">
<div class="contents">
<div class="indicator box" style="top: 220px;"></div>
</div>
</div>
</div>
<div>You should see three green boxes above. No red should be visible.</div>
third_party/WebKit/LayoutTests/external/wpt/css/css-position/position-sticky-overflow-padding.html
View file @ 91310914
<!DOCTYPE html> <!DOCTYPE html>
<title>position:sticky elements should respect padding on their ancestor overflow element</title> <title>position:sticky elements should respect padding on their ancestor overflow element</title>
<link rel="match" href="position-sticky-overflow-padding-ref.html" />
<link rel="help" href="https://www.w3.org/TR/css-position-3/#sticky-pos" /> <link rel="help" href="https://www.w3.org/TR/css-position-3/#sticky-pos" />
<meta name="assert" content="This test checks that position:sticky elements respect padding on their ancestor overflow element" /> <meta name="assert" content="This test checks that position:sticky elements respect padding on their ancestor overflow element" />
<style> <script src="/resources/testharness.js"></script>
.group { <script src="/resources/testharnessreport.js"></script>
display: inline-block;
position: relative;
width: 150px;
height: 250px;
}
.scroller { <script src="resources/sticky-util.js"></script>
/* The target sticky position should be offset by this padding. */
padding: 20px 0;
position: relative;
width: 100px;
height: 200px;
overflow-x: hidden;
overflow-y: auto;
}
.contents { <body></body>
height: 500px;
}
.prepadding {
height: 100px;
}
.container {
height: 200px;
}
.innerpadding {
height: 50px;
}
.indicator {
background-color: red;
position: absolute;
left: 0;
}
.sticky {
background-color: green;
position: sticky;
top: 0;
}
.box {
width: 100%;
height: 100px;
}
</style>
<script> <script>
window.addEventListener('load', function() { test(() => {
document.getElementById('scroller1').scrollTop = 50; const elements = setupStickyTest('top', 50);
document.getElementById('scroller2').scrollTop = 175; elements.scroller.style.padding = '20px 0';
document.getElementById('scroller3').scrollTop = 220;
}); // Before sticking; the element isn't within the padding range.
elements.scroller.scrollTop = 150;
const nonStickyTopY = elements.container.offsetTop +
elements.filler.clientHeight;
assert_equals(elements.sticky.offsetTop, nonStickyTopY);
}, 'A sticky element should not be affected by ancestor padding until it ' +
'reaches it');
test(() => {
const elements = setupStickyTest('top', 50);
elements.sticky.style.top = '0';
elements.scroller.style.padding = '20px 0';
elements.scroller.scrollTop = 200;
// This math cancels to sticky.offsetTop == (scroller.scrollTop + 50), but
// for clarity the calculations are left explicit.
const nonStickyTopY = elements.container.offsetTop +
elements.filler.clientHeight;
const targetTopY = elements.scroller.scrollTop;
const stickyOffset = targetTopY - nonStickyTopY;
assert_equals(elements.sticky.offsetTop, nonStickyTopY + stickyOffset + 20);
}, 'A sticky element should be offset by ancestor padding even when stuck');
test(() => {
const elements = setupStickyTest('top', 50);
elements.sticky.style.top = '0';
elements.scroller.style.padding = '20px 0';
elements.scroller.scrollTop = 315;
const maxOffsetInContainer = elements.container.offsetTop +
elements.container.clientHeight - elements.sticky.clientHeight;
assert_equals(elements.sticky.offsetTop, maxOffsetInContainer);
}, 'Ancestor overflow padding does not allow a sticky element to escape its ' +
'container');
</script> </script>
<div class="group">
<div id="scroller1" class="scroller">
<div class="indicator box" style="top: 170px;"></div>
<div class="contents">
<div class="prepadding"></div>
<div class="container">
<div class="innerpadding"></div>
<div class="sticky box"></div>
</div>
</div>
</div>
</div>
<div class="group">
<div id="scroller2" class="scroller">
<div class="indicator box" style="top: 195px;"></div>
<div class="contents">
<div class="prepadding"></div>
<div class="container">
<div class="innerpadding"></div>
<div class="sticky box"></div>
</div>
</div>
</div>
</div>
<div class="group">
<div id="scroller3" class="scroller">
<div class="indicator box" style="top: 220px;"></div>
<div class="contents">
<div class="prepadding"></div>
<div class="container">
<div class="innerpadding"></div>
<div class="sticky box"></div>
</div>
</div>
</div>
</div>
<div>You should see three green boxes above. No red should be visible.</div>
third_party/WebKit/LayoutTests/external/wpt/css/css-position/position-sticky-root-scroller-ref.html deleted 100644 → 0
View file @ 665cdea2
<!DOCTYPE html>
<title>Reference for position:sticky should operate correctly for the root scroller</title>
<style>
body {
/* Assumption: 3000px is taller than any user agents test window size. */
height: 3000px;
}
.indicator {
background-color: green;
position: absolute;
top: 750px;
}
.box {
width: 200px;
height: 200px;
}
</style>
<script>
window.addEventListener('load', function() {
window.scrollTo(0, 700);
});
</script>
<div class="indicator box"></div>
<div style="position: absolute; top: 1000px;">You should see a green box above. No red should be visible.</div>
third_party/WebKit/LayoutTests/external/wpt/css/css-position/position-sticky-root-scroller.html
View file @ 91310914
<!DOCTYPE html> <!DOCTYPE html>
<title>position:sticky should operate correctly for the root scroller</title> <title>position:sticky should operate correctly for the root scroller</title>
<link rel="match" href="position-sticky-root-scroller-ref.html" />
<link rel="help" href="https://www.w3.org/TR/css-position-3/#sticky-pos" /> <link rel="help" href="https://www.w3.org/TR/css-position-3/#sticky-pos" />
<meta name="assert" content="This test checks that position:sticky elements work when using the root (document) scroller" /> <meta name="assert" content="This test checks that position:sticky elements work when using the root (document) scroller" />
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<style> <style>
body { body {
/* Assumption: 3000px is taller than any user agents test window size. */ /* Assumption: 3000px is taller than any user agents test window size. */
height: 3000px; height: 3000px;
} }
.indicator { #sticky {
background-color: red;
position: absolute;
}
.sticky {
background-color: green;
position: sticky; position: sticky;
top: 50px; top: 50px;
}
.box {
width: 200px; width: 200px;
height: 200px; height: 200px;
background-color: green;
} }
</style> </style>
<div id="sticky"></div>
<script> <script>
window.addEventListener('load', function() { test(() => {
window.scrollTo(0, 700); window.scrollTo(0, 700);
}); assert_equals(sticky.offsetTop, 700 + 50);
}, 'Sticky elements work with the root (document) scroller');
</script> </script>
<div class="indicator box" style="top: 750px;"></div>
<div class="sticky box"></div>
<div style="position: absolute; top: 1000px;">You should see a green box above. No red should be visible.</div>
third_party/WebKit/LayoutTests/external/wpt/css/css-position/position-sticky-transforms-ref.html deleted 100644 → 0
View file @ 665cdea2
<!DOCTYPE html>
<title>Reference for transforms on position:sticky elements should apply after sticking</title>
<style>
.group {
display: inline-block;
position: relative;
width: 150px;
height: 250px;
}
.scroller {
position: relative;
width: 100px;
height: 200px;
overflow-x: hidden;
overflow-y: auto;
}
.contents {
height: 500px;
}
.indicator {
background-color: green;
position: relative;
}
.box {
width: 100%;
height: 50px;
}
.rotated {
transform: rotateX(60deg);
height: 100px;
width: 100%;
}
.perspective {
transform: perspective(3px) translateZ(1px);
height: 50px;
width: 50px;
}
</style>
<script>
window.addEventListener('load', function() {
document.getElementById('scroller1').scrollTop = 50;
document.getElementById('scroller2').scrollTop = 50;
document.getElementById('scroller3').scrollTop = 50;
});
</script>
<div class="group">
<div id="scroller1" class="scroller">
<div class="contents">
<div class="indicator box" style="height: 100px; top: 75px;"></div>
</div>
</div>
</div>
<div class="group">
<div id="scroller2" class="scroller">
<div class="contents">
<div class="rotated indicator" style="top: 100px;"></div>
</div>
</div>
</div>
<div class="group">
<div id="scroller3" class="scroller">
<!-- Required for blending. -->
<div class="perspective" style="position: absolute; background: red; top: 100px;"></div>
<div class="contents">
<div class="perspective indicator" style="top: 100px;"></div>
</div>
</div>
</div>
<div>You should see three green boxes above. No red should be visible.</div>
third_party/WebKit/LayoutTests/external/wpt/css/css-position/position-sticky-transforms-translate-ref.html deleted 100644 → 0
View file @ 665cdea2
<!DOCTYPE html>
<title>Reference for translations on position:sticky elements should apply after sticking</title>
<style>
.group {
display: inline-block;
position: relative;
width: 150px;
height: 250px;
}
.scroller {
position: relative;
width: 100px;
height: 200px;
overflow-x: hidden;
overflow-y: auto;
}
.contents {
height: 500px;
}
.indicator {
background-color: green;
position: relative;
}
.box {
width: 100%;
height: 50px;
}
</style>
<script>
window.addEventListener('load', function() {
document.getElementById('scroller1').scrollTop = 50;
document.getElementById('scroller2').scrollTop = 70;
document.getElementById('scroller3').scrollTop = 50;
});
</script>
<div class="group">
<div id="scroller1" class="scroller">
<div class="contents">
<div class="indicator box" style="top: 50px;"></div>
</div>
</div>
</div>
<div class="group">
<div id="scroller2" class="scroller">
<div class="contents">
<div class="indicator box" style="top: 50px;"></div>
</div>
</div>
</div>
<div class="group">
<div id="scroller3" class="scroller">
<div class="contents">
<div class="indicator box" style="top: 200px;"></div>
</div>
</div>
</div>
<div>You should see three green boxes above. No red should be visible.</div>
third_party/WebKit/LayoutTests/external/wpt/css/css-position/position-sticky-transforms-translate.html
View file @ 91310914
<!DOCTYPE html> <!DOCTYPE html>
<title>translations on position:sticky elements should apply after sticking</title> <title>translations on position:sticky elements should apply after sticking</title>
<link rel="match" href="position-sticky-transforms-translate-ref.html" />
<link rel="help" href="https://www.w3.org/TR/css-position-3/#sticky-pos" /> <link rel="help" href="https://www.w3.org/TR/css-position-3/#sticky-pos" />
<meta name="assert" content="This test checks that translations on position:sticky elements are carried out on their stuck position" /> <meta name="assert" content="This test checks that translations on position:sticky elements are carried out on their stuck position" />
<style> <script src="/resources/testharness.js"></script>
.group { <script src="/resources/testharnessreport.js"></script>
display: inline-block;
position: relative;
width: 150px;
height: 250px;
}
.scroller { <script src="resources/sticky-util.js"></script>
position: relative;
width: 100px;
height: 200px;
overflow-x: hidden;
overflow-y: auto;
}
.contents { <body style="margin: 0;"></body>
height: 500px;
}
.container {
height: 150px;
}
.indicator {
background-color: red;
position: absolute;
left: 0;
}
.sticky {
background-color: green;
position: sticky;
top: 50px;
}
.box {
width: 100%;
height: 50px;
}
</style>
<script> <script>
window.addEventListener('load', function() { test(() => {
document.getElementById('scroller1').scrollTop = 50; const elements = setupStickyTest('top', 50);
document.getElementById('scroller2').scrollTop = 70; elements.sticky.style.transform = 'translateY(-100%)';
document.getElementById('scroller3').scrollTop = 50; elements.scroller.scrollTop = 100;
}); // Transforms don't affect offsetTop, so use getBoundingClientRect.
assert_equals(elements.sticky.getBoundingClientRect().y,
elements.scroller.getBoundingClientRect().y);
}, 'Translation transform can move sticky element past sticking point');
test(() => {
const elements = setupStickyTest('top', 50);
elements.sticky.style.transform = 'translateY(50%)';
elements.scroller.scrollTop = 200;
// Transforms don't affect offsetTop, so use getBoundingClientRect.
const stickyElementOffset = elements.sticky.getBoundingClientRect().y -
elements.scroller.getBoundingClientRect().y;
assert_equals(stickyElementOffset, 100);
}, 'Stuck elements can still be moved via translations');
test(() => {
const elements = setupStickyTest('top', 50);
elements.container.style.transform = 'translateY(100px)';
elements.scroller.scrollTop = 200;
// Transforms don't affect offsetTop, so use getBoundingClientRect.
// Here the sticky element will originally have stuck at 50px from the top,
// but is then 'pulled' downwards by the 100px container transform.
const stickyElementOffset = elements.sticky.getBoundingClientRect().y -
elements.scroller.getBoundingClientRect().y;
assert_equals(stickyElementOffset, 150);
}, 'The sticky element should stick before the container is offset by a ' +
'translation');
</script> </script>
<div class="group">
<div id="scroller1" class="scroller">
<div class="indicator box" style="top: 50px;"></div>
<div class="contents">
<div class="container">
<div class="sticky box" style="transform: translateY(-100%);"></div>
</div>
</div>
</div>
</div>
<!-- The pre-transform sticky is not allowed to escape its containing block. -->
<div class="group">
<div id="scroller2" class="scroller">
<div class="indicator box" style="top: 50px;"></div>
<div class="contents">
<div class="container">
<div class="sticky box" style="transform: translateY(-100%);"></div>
</div>
</div>
</div>
</div>
<!-- The sticky element should stick before the container is transformed. -->
<div class="group">
<div id="scroller3" class="scroller">
<div class="indicator box" style="top: 200px;"></div>
<div class="contents">
<div class="container" style="transform: translateY(100px);">
<div class="sticky box"></div>
</div>
</div>
</div>
</div>
<div>You should see three green boxes above. No red should be visible.</div>
third_party/WebKit/LayoutTests/external/wpt/css/css-position/position-sticky-transforms.html
View file @ 91310914
<!DOCTYPE html> <!DOCTYPE html>
<title>transforms on position:sticky elements should apply after sticking</title> <title>transforms on position:sticky elements should apply after sticking</title>
<link rel="match" href="position-sticky-transforms-ref.html" />
<link rel="help" href="https://www.w3.org/TR/css-position-3/#sticky-pos" /> <link rel="help" href="https://www.w3.org/TR/css-position-3/#sticky-pos" />
<meta name="assert" content="This test checks that transforms on position:sticky elements are carried out on their stuck position" /> <meta name="assert" content="This test checks that transforms on position:sticky elements are carried out on their stuck position" />
<style> <script src="/resources/testharness.js"></script>
.group { <script src="/resources/testharnessreport.js"></script>
display: inline-block;
position: relative;
width: 150px;
height: 250px;
}
.scroller { <script src="resources/sticky-util.js"></script>
position: relative;
width: 100px;
height: 200px;
overflow-x: hidden;
overflow-y: auto;
}
.contents { <body style="margin: 0;"></body>
height: 500px;
}
.container {
height: 150px;
}
.indicator {
background-color: red;
position: absolute;
}
.sticky {
background-color: green;
position: sticky;
top: 50px;
}
.box {
width: 100%;
height: 50px;
}
.rotated {
transform: rotateX(60deg);
width: 100%;
height: 100px;
}
.perspective {
transform: perspective(3px) translateZ(1px);
height: 50px;
width: 50px;
}
</style>
<script> <script>
window.addEventListener('load', function() { test(() => {
document.getElementById('scroller1').scrollTop = 50; const elements = setupStickyTest('top', 50);
document.getElementById('scroller2').scrollTop = 50; elements.sticky.style.transform = 'scale(2)';
document.getElementById('scroller3').scrollTop = 50; elements.scroller.scrollTop = 200;
});
// Transforms don't affect offsetTop, so use getBoundingClientRect.
// Scaling the sticky element by 2 means its top-y moves (1/2 * height)
// upwards, in this case placing it at the top of the viewport.
const boundingRect = elements.sticky.getBoundingClientRect();
assert_equals(boundingRect.y, elements.scroller.getBoundingClientRect().y);
}, 'Scale transforms are carried out on the stuck element position');
test(() => {
const elements = setupStickyTest('top', 50);
elements.sticky.style.transform = 'rotateX(60deg)';
elements.scroller.scrollTop = 200;
// Transforms don't affect offsetTop, so use getBoundingClientRect.
// Rotating around the x-axis essentially 'squashes' it (from the camera's
// viewpoint), in this case shifting the offset to 75 rather than 50.
const stickyElementOffset = elements.sticky.getBoundingClientRect().y -
elements.scroller.getBoundingClientRect().y;
assert_equals(stickyElementOffset, 75);
}, 'Rotate transforms are carried out on the stuck element position');
test(() => {
const elements = setupStickyTest('top', 50);
elements.sticky.style.transform = 'perspective(3px) translateZ(1px)';
elements.scroller.scrollTop = 200;
// Transforms don't affect offsetTop, so use getBoundingClientRect.
const stickyElementOffset = elements.sticky.getBoundingClientRect().y -
elements.scroller.getBoundingClientRect().y;
assert_equals(stickyElementOffset, 25);
}, 'Perspective transforms are carried out on the stuck element position');
</script> </script>
<div class="group">
<div id="scroller1" class="scroller">
<div class="indicator box" style="height: 100px; top: 75px;"></div>
<div class="contents">
<div class="container">
<div class="sticky box" style="transform: scale(2);"></div>
</div>
</div>
</div>
</div>
<div class="group">
<div id="scroller2" class="scroller">
<div class="rotated indicator" style="top: 100px;"></div>
<div class="contents">
<div class="container" style="height: 250px;">
<div class="rotated sticky"></div>
</div>
</div>
</div>
</div>
<div class="group">
<div id="scroller3" class="scroller">
<div class="perspective indicator" style="top: 100px;"></div>
<div class="contents">
<div class="container">
<div class="perspective sticky"></div>
</div>
</div>
</div>
</div>
<div>You should see three green boxes above. No red should be visible.</div>
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