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[css-anchor-position-1] position-area normal alignment towards non-auto inset (#55722)
* Adds test for position-area normal alignment towards non-auto inset when only one inset is auto. * Updates some existing tests that have a single auto inset but don't expect it to have an effect. See w3c/csswg-drafts#12512
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‎css/css-anchor-position/position-area-alignment-inset-001-expected.html‎

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<!DOCTYPE html>
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<title>position-area normal alignment vs insets</title>
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<link rel="help" href="https://www.w3.org/TR/css-anchor-position/#position-area-alignment">
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<meta name="assert" content="Test passes if normal alignment aligns towards the non-auto inset.">
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<style>
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.container {
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position: relative;
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width: 100px;
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height: 120px;
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border: solid;
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margin: 1em;
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float: left;
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}
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.anchor {
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border: solid blue 10px;
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inset: 0;
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place-self: center;
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position: absolute;
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}
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.test {
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border: solid 5px;
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position: absolute;
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width: 0;
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height: 0;
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}
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.inset1 {
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margin-bottom: auto;
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margin-left: auto;
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border-color: orange;
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}
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.inset2 {
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margin-top: auto;
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margin-right: auto;
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border-color: teal;
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}
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.center {
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margin: auto;
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border-color: aqua;
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}
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</style>
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<div class="container">
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<div class="anchor"></div>
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<div class="test inset1" style="inset: 0 60px 70px 0"></div>
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<div class="test center" style="inset: 0 60px 70px 0"></div>
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<div class="test inset2" style="inset: 0 60px 70px 0"></div>
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<div class="test inset1" style="inset: 70px 0 0 60px"></div>
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<div class="test center" style="inset: 70px 0 0 60px"></div>
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<div class="test inset2" style="inset: 70px 0 0 60px"></div>
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<div class="test inset1" style="inset: 50px 40px 50px 40px"></div>
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<div class="test center" style="inset: 50px 40px 50px 40px"></div>
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<div class="test inset2" style="inset: 50px 40px 50px 40px"></div>
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</div>
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<div class="container">
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<div class="anchor"></div>
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<div class="test inset1" style="inset: 0 0 70px"></div>
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<div class="test center" style="inset: 0 0 70px"></div>
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<div class="test inset2" style="inset: 0 0 70px"></div>
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<div class="test inset1" style="inset: 70px 0 0"></div>
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<div class="test center" style="inset: 70px 0 0"></div>
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<div class="test inset2" style="inset: 70px 0 0"></div>
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<div class="test inset1" style="inset: 50px 0"></div>
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<div class="test center" style="inset: 50px 0"></div>
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<div class="test inset2" style="inset: 50px 0"></div>
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</div>
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<div class="container" style="writing-mode: vertical-rl">
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<div class="anchor"></div>
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<div class="test inset1" style="inset: 0 60px 70px 0"></div>
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<div class="test center" style="inset: 0 60px 70px 0"></div>
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<div class="test inset2" style="inset: 0 60px 70px 0"></div>
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<div class="test inset1" style="inset: 70px 0 0 60px"></div>
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<div class="test center" style="inset: 70px 0 0 60px"></div>
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<div class="test inset2" style="inset: 70px 0 0 60px"></div>
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<div class="test inset1" style="inset: 50px 40px 50px 40px"></div>
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<div class="test center" style="inset: 50px 40px 50px 40px"></div>
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<div class="test inset2" style="inset: 50px 40px 50px 40px"></div>
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</div>
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<div class="container" style="writing-mode: vertical-rl">
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<div class="anchor"></div>
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<div class="test inset1" style="inset: 0 0 70px"></div>
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<div class="test center" style="inset: 0 0 70px"></div>
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<div class="test inset2" style="inset: 0 0 70px"></div>
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<div class="test inset1" style="inset: 70px 0 0"></div>
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<div class="test center" style="inset: 70px 0 0"></div>
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<div class="test inset2" style="inset: 70px 0 0"></div>
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<div class="test inset1" style="inset: 0 40px"></div>
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<div class="test center" style="inset: 0 40px"></div>
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<div class="test inset2" style="inset: 0 40px"></div>
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</div>

‎css/css-anchor-position/position-area-alignment-inset-001-ref.html‎

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<!DOCTYPE html>
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<title>position-area normal alignment vs insets</title>
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<link rel="help" href="https://www.w3.org/TR/css-anchor-position/#position-area-alignment">
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<meta name="assert" content="Test passes if normal alignment aligns towards the non-auto inset.">
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<style>
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.container {
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position: relative;
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width: 100px;
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height: 120px;
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border: solid;
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margin: 1em;
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float: left;
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}
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.anchor {
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border: solid blue 10px;
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inset: 0;
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place-self: center;
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position: absolute;
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}
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.test {
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border: solid 5px;
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position: absolute;
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width: 0;
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height: 0;
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}
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.inset1 {
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margin-bottom: auto;
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margin-left: auto;
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border-color: orange;
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}
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.inset2 {
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margin-top: auto;
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margin-right: auto;
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border-color: teal;
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}
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.center {
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margin: auto;
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border-color: aqua;
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}
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</style>
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<div class="container">
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<div class="anchor"></div>
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<div class="test inset1" style="inset: 0 60px 70px 0"></div>
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<div class="test center" style="inset: 0 60px 70px 0"></div>
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<div class="test inset2" style="inset: 0 60px 70px 0"></div>
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<div class="test inset1" style="inset: 70px 0 0 60px"></div>
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<div class="test center" style="inset: 70px 0 0 60px"></div>
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<div class="test inset2" style="inset: 70px 0 0 60px"></div>
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<div class="test inset1" style="inset: 50px 40px 50px 40px"></div>
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<div class="test center" style="inset: 50px 40px 50px 40px"></div>
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<div class="test inset2" style="inset: 50px 40px 50px 40px"></div>
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</div>
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<div class="container">
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<div class="anchor"></div>
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<div class="test inset1" style="inset: 0 0 70px"></div>
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<div class="test center" style="inset: 0 0 70px"></div>
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<div class="test inset2" style="inset: 0 0 70px"></div>
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<div class="test inset1" style="inset: 70px 0 0"></div>
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<div class="test center" style="inset: 70px 0 0"></div>
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<div class="test inset2" style="inset: 70px 0 0"></div>
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<div class="test inset1" style="inset: 50px 0"></div>
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<div class="test center" style="inset: 50px 0"></div>
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<div class="test inset2" style="inset: 50px 0"></div>
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</div>
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<div class="container" style="writing-mode: vertical-rl">
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<div class="anchor"></div>
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<div class="test inset1" style="inset: 0 60px 70px 0"></div>
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<div class="test center" style="inset: 0 60px 70px 0"></div>
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<div class="test inset2" style="inset: 0 60px 70px 0"></div>
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<div class="test inset1" style="inset: 70px 0 0 60px"></div>
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<div class="test center" style="inset: 70px 0 0 60px"></div>
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<div class="test inset2" style="inset: 70px 0 0 60px"></div>
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<div class="test inset1" style="inset: 50px 40px 50px 40px"></div>
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<div class="test center" style="inset: 50px 40px 50px 40px"></div>
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<div class="test inset2" style="inset: 50px 40px 50px 40px"></div>
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</div>
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<div class="container" style="writing-mode: vertical-rl">
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<div class="anchor"></div>
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<div class="test inset1" style="inset: 0 0 70px"></div>
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<div class="test center" style="inset: 0 0 70px"></div>
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<div class="test inset2" style="inset: 0 0 70px"></div>
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<div class="test inset1" style="inset: 70px 0 0"></div>
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<div class="test center" style="inset: 70px 0 0"></div>
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<div class="test inset2" style="inset: 70px 0 0"></div>
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<div class="test inset1" style="inset: 0 40px"></div>
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<div class="test center" style="inset: 0 40px"></div>
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<div class="test inset2" style="inset: 0 40px"></div>
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</div>

‎css/css-anchor-position/position-area-alignment-inset-001.html‎

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<!DOCTYPE html>
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<title>position-area normal alignment vs insets</title>
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<link rel="help" href="https://www.w3.org/TR/css-anchor-position/#position-area-alignment">
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<meta name="assert" content="Test passes if normal alignment aligns towards the non-auto inset.">
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<style>
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.container {
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position: relative;
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width: 100px;
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height: 120px;
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border: solid;
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margin: 1em;
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float: left;
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}
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.anchor {
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border: solid blue 10px;
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anchor-name: --foo;
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inset: 0;
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place-self: center;
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position: absolute;
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}
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.test {
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border: solid 5px;
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position: absolute;
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position-anchor: --foo;
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}
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.inset1 {
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top: 0;
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right: 0;
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border-color: orange;
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}
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.inset2 {
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bottom: 0;
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left: 0;
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border-color: teal;
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}
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.center {
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place-self: center;
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border-color: aqua;
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}
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</style>
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<div class="container">
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<div class="anchor"></div>
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<div class="test inset1" style="position-area: top left"></div>
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<div class="test center" style="position-area: top left"></div>
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<div class="test inset2" style="position-area: top left"></div>
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<div class="test inset1" style="position-area: bottom right"></div>
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<div class="test center" style="position-area: bottom right"></div>
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<div class="test inset2" style="position-area: bottom right"></div>
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<div class="test inset1" style="position-area: center"></div>
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<div class="test center" style="position-area: center"></div>
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<div class="test inset2" style="position-area: center"></div>
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</div>
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<div class="container">
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<div class="anchor"></div>
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<div class="test inset1" style="position-area: top"></div>
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<div class="test center" style="position-area: top"></div>
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<div class="test inset2" style="position-area: top"></div>
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<div class="test inset1" style="position-area: bottom"></div>
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<div class="test center" style="position-area: bottom"></div>
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<div class="test inset2" style="position-area: bottom"></div>
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<div class="test inset1" style="position-area: center span-all"></div>
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<div class="test center" style="position-area: center span-all"></div>
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<div class="test inset2" style="position-area: center span-all"></div>
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</div>
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<div class="container" style="writing-mode: vertical-rl">
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<div class="anchor"></div>
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<div class="test inset1" style="position-area: top left"></div>
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<div class="test center" style="position-area: top left"></div>
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<div class="test inset2" style="position-area: top left"></div>
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<div class="test inset1" style="position-area: bottom right"></div>
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<div class="test center" style="position-area: bottom right"></div>
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<div class="test inset2" style="position-area: bottom right"></div>
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<div class="test inset1" style="position-area: center"></div>
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<div class="test center" style="position-area: center"></div>
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<div class="test inset2" style="position-area: center"></div>
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</div>
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<div class="container" style="writing-mode: vertical-rl">
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<div class="anchor"></div>
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<div class="test inset1" style="position-area: top"></div>
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<div class="test center" style="position-area: top"></div>
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<div class="test inset2" style="position-area: top"></div>
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<div class="test inset1" style="position-area: bottom"></div>
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<div class="test center" style="position-area: bottom"></div>
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<div class="test inset2" style="position-area: bottom"></div>
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<div class="test inset1" style="position-area: center span-all"></div>
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<div class="test center" style="position-area: center span-all"></div>
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<div class="test inset2" style="position-area: center span-all"></div>
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</div>

‎css/css-anchor-position/position-visibility-anchors-valid.tentative.html‎

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width: 100px;
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height: 100px;
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background: red;
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top: 0;
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left: 0;
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inset: 0;
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}
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</style>
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‎css/css-anchor-position/position-visibility-anchors-visible-after-scroll-in-document.html‎

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height: 100px;
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background: green;
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position: absolute;
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top: 0;
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left: 0;
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inset: 0;
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}
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</style>
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‎css/css-anchor-position/position-visibility-anchors-visible-after-scroll-in.html‎

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height: 100px;
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background: green;
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position: absolute;
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top: 0;
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left: 0;
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inset: 0;
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}
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</style>
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‎css/css-anchor-position/position-visibility-anchors-visible-chained-004.html‎

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height: 50px;
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background: green;
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position: absolute;
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top: 0;
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left: 0;
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inset: 0;
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}
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#chained {

‎css/css-anchor-position/position-visibility-anchors-visible-change-anchor.html‎

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height: 100px;
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background: green;
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position: absolute;
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top: 0;
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left: 0;
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inset: 0;
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}
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</style>
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‎css/css-anchor-position/position-visibility-anchors-visible-change-css-visibility.html‎

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height: 100px;
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background: green;
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position: absolute;
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top: 0;
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left: 0;
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inset: 0;
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}
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</style>
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‎css/css-anchor-position/position-visibility-anchors-visible-in-overflow-ref.html‎

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height: 50px;
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background: green;
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position: absolute;
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top: 0;
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left: 0;
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inset: 0;
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}
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#target-b {
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position-anchor: --anchor;
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height: 50px;
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background: green;
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position: absolute;
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top: 0;
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left: 0;
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inset: 0;
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}
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#target-c {
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position-anchor: --anchor;
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height: 50px;
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background: green;
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position: absolute;
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top: 0;
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left: 0;
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inset: 0;
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}
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</style>
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