fix(client): make page data hmr work as expected

Author: meteorlxy

packages/@vuepress/client/src/injections/pageData.ts

@@ -41,6 +41,7 @@ export const resolvePageData = async (routePath: string): Promise<PageData> => {
 if (import.meta.webpackHot || import.meta.hot) {
   // reuse vue HMR runtime
   __VUE_HMR_RUNTIME__.updatePageData = (data: PageData) => {
+    pagesData.value[data.path] = () => Promise.resolve(data)
     if (data.key === pageData.value.key) {
       pageData.value = data
     }

packages/@vuepress/client/src/injections/pagesData.ts

@@ -1,12 +1,12 @@
-import { readonly, ref } from 'vue'
+import { ref } from 'vue'
 import type { Ref } from 'vue'
 import type { PageData } from '@vuepress/shared'
 import { pagesData as pagesDataRaw } from '@internal/pagesData'
 
 export type PagesData = Record<string, () => Promise<PageData>>
 export type PagesDataRef = Ref<PagesData>
 
-export const pagesData: PagesDataRef = ref(readonly(pagesDataRaw) as PagesData)
+export const pagesData: PagesDataRef = ref(pagesDataRaw)
 
 export const usePagesData = (): PagesDataRef => {
   return pagesData