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<!doctype html>
<meta charset="utf-8">
<title>CSS Selectors Invalidation: :nth-child(... of pseudo-class)</title>
<link rel="author" title="Zach Hoffman" href="mailto:zach@zrhoffman.net">
<link rel="match" href="nth-child-of-pseudo-class-ref.html">
<link rel="help" href="https://drafts.csswg.org/selectors-4/#child-index">
<style>
p:nth-child(odd of :defined) {
color: green;
}
not-defined, my-element {
display: block;
margin-block: 1em;
margin-inline: 0;
}
</style>
<div>
<not-defined>Ignored</not-defined>
<not-defined>Ignored</not-defined>
<p>Not ignored</p>
<my-element>Selectively ignored</my-element>
<p>Not ignored</p>
<p>Not ignored</p>
<p>Not ignored</p>
<not-defined>Ignored</not-defined>
</div>
<script>
document.documentElement.offsetTop;
customElements.define("my-element", class MyElement extends HTMLElement{});
</script>
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