Nuxt/packages/nuxt/src/app/plugins/chunk-reload.client.ts

import { joinURL } from 'ufo'
import { defineNuxtPlugin, useRuntimeConfig } from '#app/nuxt'
import { useRouter } from '#app/composables/router'
import { reloadNuxtApp } from '#app/composables/chunk'

export default defineNuxtPlugin((nuxtApp) => {
  const router = useRouter()
  const config = useRuntimeConfig()

  const chunkErrors = new Set()

  router.beforeEach(() => { chunkErrors.clear() })
  nuxtApp.hook('app:chunkError', ({ error }) => { chunkErrors.add(error) })

  router.onError((error, to) => {
    if (chunkErrors.has(error)) {
      const isHash = 'href' in to && (to.href as string).startsWith('#')
      const path = isHash ? config.app.baseURL + (to as any).href : joinURL(config.app.baseURL, to.fullPath)
      reloadNuxtApp({ path, persistState: true })
    }
  })
})