another attempt

src/client/app/composables/preFetch.ts

@@ -66,7 +66,7 @@ export function usePrefetch() {
           if (!hasFetched.has(pathname)) {
             hasFetched.add(pathname)
             const pageChunkPath = pathToFile(pathname)
-            doFetch(pageChunkPath)
+            if (pageChunkPath) doFetch(pageChunkPath)
           }
         }
       })
@@ -76,7 +76,6 @@ export function usePrefetch() {
       document
         .querySelectorAll<HTMLAnchorElement | SVGAElement>('#app a')
         .forEach((link) => {
-          const { target } = link
           const { hostname, pathname } = new URL(
             link.href instanceof SVGAnimatedString
               ? link.href.animVal
@@ -91,7 +90,7 @@ export function usePrefetch() {
           if (
             // only prefetch same tab navigation, since a new tab will load
             // the lean js chunk instead.
-            target !== `_blank` &&
+            link.target !== '_blank' &&
             // only prefetch inbound links
             hostname === location.hostname
           ) {

src/client/app/index.ts

@@ -1,23 +1,22 @@
+import RawTheme from '@theme/index'
 import {
-  type App,
   createApp as createClientApp,
   createSSRApp,
   defineComponent,
   h,
   onMounted,
-  watchEffect
+  watchEffect,
+  type App
 } from 'vue'
-import RawTheme from '@theme/index'
-import { inBrowser, pathToFile } from './utils'
-import { type Router, RouterSymbol, createRouter, scrollTo } from './router'
-import { siteDataRef, useData } from './data'
-import { useUpdateHead } from './composables/head'
-import { usePrefetch } from './composables/preFetch'
-import { dataSymbol, initData } from './data'
-import { Content } from './components/Content'
 import { ClientOnly } from './components/ClientOnly'
-import { useCopyCode } from './composables/copyCode'
+import { Content } from './components/Content'
 import { useCodeGroups } from './composables/codeGroups'
+import { useCopyCode } from './composables/copyCode'
+import { useUpdateHead } from './composables/head'
+import { usePrefetch } from './composables/preFetch'
+import { dataSymbol, initData, siteDataRef, useData } from './data'
+import { RouterSymbol, createRouter, scrollTo, type Router } from './router'
+import { inBrowser, pathToFile } from './utils'
 
 function resolveThemeExtends(theme: typeof RawTheme): typeof RawTheme {
   if (theme.extends) {
@@ -123,6 +122,8 @@ function newRouter(): Router {
   return createRouter((path) => {
     let pageFilePath = pathToFile(path)
 
+    if (!pageFilePath) return null
+
     if (isInitialPageLoad) {
       initialPath = pageFilePath
     }

src/client/app/router.ts

@@ -22,7 +22,7 @@ export const RouterSymbol: InjectionKey<Router> = Symbol()
 
 // we are just using URL to parse the pathname and hash - the base doesn't
 // matter and is only passed to support same-host hrefs.
-const fakeHost = `http://a.com`
+const fakeHost = 'http://a.com'
 
 const getDefaultRoute = (): Route => ({
   path: '/',
@@ -36,7 +36,7 @@ interface PageModule {
 }
 
 export function createRouter(
-  loadPageModule: (path: string) => Promise<PageModule>,
+  loadPageModule: (path: string) => Awaitable<PageModule> | null,
   fallbackComponent?: Component
 ): Router {
   const route = reactive(getDefaultRoute())
@@ -73,6 +73,9 @@ export function createRouter(
     const pendingPath = (latestPendingPath = targetLoc.pathname)
     try {
       let page = await loadPageModule(pendingPath)
+      if (!page) {
+        throw new Error(`Page not found: ${pendingPath}`)
+      }
       if (latestPendingPath === pendingPath) {
         latestPendingPath = null
 
@@ -120,7 +123,10 @@ export function createRouter(
         }
       }
     } catch (err: any) {
-      if (!/fetch/.test(err.message) && !/^\/404(\.html|\/)?$/.test(href)) {
+      if (
+        !/fetch|Page not found/.test(err.message) &&
+        !/^\/404(\.html|\/)?$/.test(href)
+      ) {
         console.error(err)
       }
 
@@ -176,7 +182,7 @@ export function createRouter(
             !e.shiftKey &&
             !e.altKey &&
             !e.metaKey &&
-            target !== `_blank` &&
+            !target &&
             origin === currentUrl.origin &&
             // don't intercept if non-html extension is present
             !(extMatch && extMatch[0] !== '.html')

src/client/app/utils.ts

@@ -18,7 +18,7 @@ export { inBrowser } from '../shared'
 /**
  * Join two paths by resolving the slash collision.
  */
-export function joinPath(base: string, path: string): string {
+export function joinPath(base: string, path: string) {
   return `${base}${path}`.replace(/\/+/g, '/')
 }
 
@@ -31,7 +31,7 @@ export function withBase(path: string) {
 /**
  * Converts a url path to the corresponding js chunk filename.
  */
-export function pathToFile(path: string): string {
+export function pathToFile(path: string) {
   let pagePath = path.replace(/\.html$/, '')
   pagePath = decodeURIComponent(pagePath)
   pagePath = pagePath.replace(/\/$/, '/index') // /foo/ -> /foo/index
@@ -57,6 +57,7 @@ export function pathToFile(path: string): string {
           : pagePath.slice(0, -3) + '_index.md'
         pageHash = __VP_HASH_MAP__[pagePath.toLowerCase()]
       }
+      if (!pageHash) return null
       pagePath = `${base}assets/${pagePath}.${pageHash}.js`
     } else {
       // ssr build uses much simpler name mapping

src/client/theme-default/components/VPLocalSearchBox.vue

@@ -230,6 +230,7 @@ debouncedWatch(
 async function fetchExcerpt(id: string) {
   const file = pathToFile(id.slice(0, id.indexOf('#')))
   try {
+    if (!file) throw new Error(`Cannot find file for id: ${id}`)
     return { id, mod: await import(/*@vite-ignore*/ file) }
   } catch (e) {
     console.error(e)

src/client/theme-default/support/utils.ts

@@ -33,7 +33,7 @@ export function normalizeLink(url: string): string {
   }
 
   const { site } = useData()
-  const { pathname, search, hash } = new URL(url, 'http://example.com')
+  const { pathname, search, hash } = new URL(url, 'http://a.com')
 
   const normalizedPath =
     pathname.endsWith('/') || pathname.endsWith('.html')