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ladybird/Tests/LibWeb/Text/input/DOM/Element-removeAttributeNode.html
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HTML

<!DOCTYPE html>
<script src="../include.js"></script>
<script>
test(() => {
let e = document.createElement("div");
e.setAttribute("foo", "bar");
let a = e.getAttributeNode("foo");
let removed = e.removeAttributeNode(a);
println(a === removed);
try {
e.removeAttributeNode(a);
println("FAIL");
} catch (e) {
println("OK: " + e);
}
});
</script>