45 lines
700 B
HTML
45 lines
700 B
HTML
<!DOCTYPE html>
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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: 100px;
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}
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#anchor {
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position: absolute;
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anchor-name: --a;
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left: 0;
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top: 0;
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width: 10px;
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height: 10px;
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background: cornflowerblue;
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}
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#target {
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position: absolute;
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position-anchor: --a;
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left: 0;
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top: anchor(bottom);
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width: 10px;
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height: 80px;
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background: lime;
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position-try-fallbacks: --fallback;
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}
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@position-try --fallback {
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left: anchor(right);
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top: 0;
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width: 10px;
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height: 10%;
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}
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</style>
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<div id="container">
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<div id="anchor"></div>
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<div id="target"></div>
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</div>
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<script>
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document.body.offsetTop;
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document.getElementById('container').style.height = '20px';
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</script>
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