141 lines
3.3 KiB
HTML
141 lines
3.3 KiB
HTML
<!DOCTYPE html>
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<title>CSS Anchor Positioning Test: @position-try and cascade interaction</title>
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<link rel="help" href="https://drafts.csswg.org/css-anchor-position-1/#fallback-apply">
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<script src="/resources/testharness.js"></script>
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<script src="/resources/testharnessreport.js"></script>
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<style>
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.cb {
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position: relative;
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width: 100px;
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height: 100px;
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background: lightpink;
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display: inline-block;
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}
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.abs {
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position: absolute;
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background: darkcyan;
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left: 0px;
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top: 0px;
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width: 150px; /* force fallback */
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height: 25px;
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position-try-fallbacks: --pf;
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}
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@position-try --pf {
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width: 50px;
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left: 50px;
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top: 50px;
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}
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</style>
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<!-- Basic @position-try rule -->
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<div class=cb>
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<div id=abs_try class=abs></div>
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</div>
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<script>
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test(() => {
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assert_equals(abs_try.offsetLeft, 50);
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assert_equals(abs_try.offsetTop, 50);
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}, '@position-try rule applies');
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</script>
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<!-- Inline style -->
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<div class=cb>
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<div id=abs_inline class=abs style="left:20px"></div>
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</div>
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<script>
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test(() => {
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assert_equals(abs_inline.offsetLeft, 50);
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assert_equals(abs_inline.offsetTop, 50);
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}, '@position-try rule wins over inline style');
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</script>
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<!-- !important -->
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<style>
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#abs_important {
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left: 10px !important;
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}
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</style>
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<div class=cb>
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<div id=abs_important class=abs></div>
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</div>
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<script>
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test(() => {
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assert_equals(abs_important.offsetLeft, 10);
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assert_equals(abs_important.offsetTop, 50);
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}, '@position-try rule does not win over !important');
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</script>
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<!-- Animations -->
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<style>
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@keyframes anim {
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from { top: 20px; }
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to { top: 20px; }
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}
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#abs_animation {
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animation: anim 1000s steps(2, start) paused;
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}
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</style>
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<div class=cb>
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<div id=abs_animation class=abs></div>
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</div>
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<script>
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test(() => {
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assert_equals(abs_animation.offsetLeft, 50);
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assert_equals(abs_animation.offsetTop, 20);
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}, '@position-try rule does not win over animations');
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</script>
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<!-- Transitions -->
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<style>
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#abs_transition.move {
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top: 10px !important;
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transition: top 1000s steps(2, start);
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</style>
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<div class=cb>
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<div id=abs_transition class=abs></div>
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</div>
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<script>
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test(() => {
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abs_transition.offsetTop;
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abs_transition.classList.add('move');
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assert_equals(abs_transition.offsetLeft, 50);
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assert_equals(abs_transition.offsetTop, 30);
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}, '@position-try rule does not win over transitions');
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</script>
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<!-- revert / revert-layer -->
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<style>
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#abs_revert {
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position-try-fallbacks: --pf-revert;
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}
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@layer author-layer {
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#abs_revert {
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top: 30px;
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left: 30px;
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}
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}
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#abs_revert {
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top: 20px;
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left: 20px;
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/* overflowing .cb to force --pf-revert to be applied */
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width: 200px;
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height: 200px;
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}
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@position-try --pf-revert {
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left: revert;
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top: revert-layer;
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width: 30px;
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height: 30px;
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}
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</style>
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<div class=cb class=abs>
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<div id=abs_revert class=abs></div>
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</div>
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<script>
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test(() => {
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assert_equals(abs_revert.offsetLeft, 0, "left reverted back to user origin");
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assert_equals(abs_revert.offsetTop, 20, "top reverted back to author");
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assert_equals(abs_revert.offsetWidth, 30, "width from --pf-revert");
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assert_equals(abs_revert.offsetHeight, 30, "height from --pf-revert");
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}, '@position-try revert / revert-layer reverts to user / author origin');
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</script>
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