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<html class="test-wait">
<style>
h1::before { content: " [before] "; display: table; }
</style>
<h1>Heading</h1>
<script>
async function trigger1() {
let heading = document.querySelector('h1');
let computed_accessible_node = await self.getComputedAccessibleNode(heading);
let first_child = computed_accessible_node.firstChild;
// The first child of the heading is a pseudo element <table>.
await first_child.ensureUpToDate();
// The next child down has an accessibility object but no node.
let grand_child = first_child.firstChild;
await grand_child.ensureUpToDate();
document.documentElement.className = '';
}
trigger1();
</script>
</html>
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