ladybird/Tests/LibWeb/Text/input/css/animating-unresolved-properties-crash.html

<!-- https://github.com/SerenityOS/serenity/issues/23609 -->
<style>
    :root {
        --accent: #00f;
    }

    @keyframes myMove {
        0% {
            border-top: 2px solid var(--accent);
        }
    }

    div {
        animation: myMove 1s infinite;
    }
</style>
<div></div>
<script src="../include.js"></script>
<script>
    asyncTest(done => {
        requestAnimationFrame(() => {
            println("PASS! (Didn't crash)");
            done();
        });
    });
</script>