vue3 单页面body样式

<script>
import { onBeforeMount, onBeforeUnmount } from "vue";

export default {
    setup() {
        onBeforeMount(() => {
            document.body.setAttribute("style", "background: #fff");
        });
        onBeforeUnmount(() => {
            document.body.removeAttribute("style");
        });
    },
};
</script>