ladybird/Tests/LibWeb/Text/input/HTML/set-outerHTML.html

<script src="../include.js"></script>
<div id="oldBox"><p>A box.</p></div>
<script>
    test(() => {
        let oldElement = document.getElementById("oldBox");
        println(`${oldElement.id}='${oldElement.innerHTML}'`);

        oldElement.outerHTML = '<div id="newBox"><p>Changed box.</p></div>';

        let newElement = document.getElementById("newBox");
        println(`${newElement.id}='${newElement.innerHTML}'`);

        try {
            document.documentElement.outerHTML = 'should throw exception!';
        } catch (e) {
            println(e);
        }
    });
</script>