# 关于Nuxt的一些API ## Components 组件 ## Composables 复合函数 ## Utils 工具 ### `definePageMeta(meta: PageMeta): void` > 定义页面属性 ```typescript interface PageMeta { validate?: (route: RouteLocationNormalized) => boolean | Promise | Partial | Promise> redirect?: RouteRecordRedirectOption name?: string path?: string props?: RouteRecordRaw['props'] alias?: string | string[] pageTransition?: boolean | TransitionProps layoutTransition?: boolean | TransitionProps viewTransition?: boolean | 'always' key?: false | string | ((route: RouteLocationNormalizedLoaded) => string) keepalive?: boolean | KeepAliveProps layout?: false | LayoutKey | Ref | ComputedRef middleware?: MiddlewareKey | NavigationGuard | Array scrollToTop?: boolean | ((to: RouteLocationNormalizedLoaded, from: RouteLocationNormalizedLoaded) => boolean) [key: string]: unknown } ``` - layoutTransition > 设置要应用于当前布局的过渡的名称。您还可以将此值设置为 false 以禁用布局过渡。 > > Type: boolean | TransitionProps - pageTransition > 设置要应用于当前页面的过渡的名称。您还可以将此值设置为 false 以禁用布局过渡。 > > Type: boolean | TransitionProps ### `onBeforeRouteLeave(leaveGuard): void` eg: '/pages/index.vue' > 当前路由离开前的拦截 > > leaveGuard: Navigation Guard. 导航护卫。 > > (to, from, next)