File: popover-open-with-has-sibling-selector.html

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<!DOCTYPE html>
<html class="reftest-wait">
<link rel="author" title="Tim Nguyen" href="https://github.com/nt1m">
<link rel="help" href="https://drafts.csswg.org/selectors/#selectordef-popover-open">
<link rel="match" href="../reference/ref-filled-green-100px-square.xht">
<style>
    .half-square {
        width: 100px;
        height: 50px;
        background-color: red;
    }
    #p1-sibling:not(:has(+:popover-open)) {
        background-color: green;
    }
    #p2-sibling:has(+:popover-open) {
        background-color: green;
    }
    [popover] {
        visibility: hidden;
    }
</style>

<p>Test passes if there is a filled green square and <strong>no red</strong>.</p>

<div>
    <div id="p1-sibling" class="half-square"></div>
    <div popover id="p1">Popover 1</div>
</div>

<div>
    <div id="p2-sibling" class="half-square"></div>
    <div popover id="p2">Popover 2</div>
</div>

<script>
    addEventListener("load", async () => {
        p1.showPopover();
        await new Promise(r => requestAnimationFrame(r));
        p1.hidePopover();
        await new Promise(r => requestAnimationFrame(r));
        p2.showPopover();
        document.documentElement.classList.remove("reftest-wait");
    });
</script>
</html>