vuepress-theme-aurora/lib/client/clientAppSetup.js

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import { computed, provide } from 'vue';
import { defineClientAppSetup, usePageFrontmatter } from '@vuepress/client';
import {resolveSidebarItems, sidebarItemsSymbol, useThemeData, useThemeLocaleData,} from './composables';
export default defineClientAppSetup(() => {
    // we need to access sidebar items in multiple components
    // so we make it global computed
    const themeLocale = useThemeLocaleData();
    const frontmatter = usePageFrontmatter();
    const sidebarItems = computed(() => resolveSidebarItems(frontmatter.value, themeLocale.value));
    provide(sidebarItemsSymbol, sidebarItems);
});