:::demo By default Menu is vertical, but you can change it to horizontal by setting the mode prop to 'horizontal'. In addition, you can use the sub-menu component to create a second level menu. Menu provides `background-color`, `text-color` and `active-text-color` to customize the colors.
:::demo You can use the el-menu-item-group component to create a menu group, and the name of the group is determined by the title prop or a named slot.
| select | callback function when menu is activated | index: index of activated menu, indexPath: index path of activated menu, item: the selected menu item, routeResult: result returned by `vue-router` if `router` is enabled |
| open | callback function when sub-menu expands | index: index of expanded sub-menu, indexPath: index path of expanded sub-menu |
| close | callback function when sub-menu collapses | index: index of collapsed sub-menu, indexPath: index path of collapsed sub-menu |
| popper-class | custom class name for the popup menu | string | — | — |
| show-timeout | timeout before showing a sub-menu | number | — | 300 |
| hide-timeout | timeout before hiding a sub-menu | number | — | 300 |
| disabled | whether the sub-menu is disabled | boolean | — | false |
| popper-append-to-body | whether to append the popup menu to body. If the positioning of the menu is wrong, you can try setting this prop | boolean | - | level one SubMenu: true / other SubMenus: false |
