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<!DOCTYPE html>
<meta charset="utf-8">
<link rel=author href="mailto:xiaochengh@chromium.org">
<link rel=help href="https://open-ui.org/components/popover.research.explainer">
<link rel=help href="https://html.spec.whatwg.org/multipage/popover.html">
<button id=main-menu-button>Show menu</button>
<div id=main-menu>
<div>Foo</div>
<button id=nested-menu-button>
Show nested menu
</button>
<div>Bar</div>
</div>
<div id=nested-menu>
Baz
</div>
<style>
#main-menu-button {
position: absolute;
top: 200px;
left: 100px;
width: 100px;
}
#main-menu {
position: absolute;
top: 200px;;
left: 200px;
width: 150px;
line-height: 20px;
}
#nested-menu-button {
width: 100%;
}
#nested-menu {
position: absolute;
top: 220px;
left: 350px;
}
[popover] {
border: 0;
margin: 0;
padding: 0;
}
</style>
<script>
document.getElementById('main-menu-button').click();
document.getElementById('nested-menu-button').click();
</script>
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