css
Description
Optional. Adds a custom style to the menu itemUsage
css?: string;
Example
<div>
    <MenuBar {options} css={"mystyle"}></MenuBar>
</div>
<style>
    :global(.wx-menu.mystyle) {
        border: 1px solid black;
        background-color: brown;
    }
    :global(.wx-menu.mystyle .wx-item) {
        background-color: brown;
        color: white;
    }
</style>
Related article: Styling an item of MenuBar