Nuxt/packages/nuxt/src/app/plugins/check-outdated-build.client.ts

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import { joinURL } from 'ufo'
import type { NuxtAppManifestMeta } from '#app'
import { defineNuxtPlugin, getAppManifest, onNuxtReady, useRuntimeConfig } from '#app'
export default defineNuxtPlugin((nuxtApp) => {
if (import.meta.test) { return }
let timeout: NodeJS.Timeout
const config = useRuntimeConfig()
async function getLatestManifest () {
const currentManifest = await getAppManifest()
if (timeout) { clearTimeout(timeout) }
timeout = setTimeout(getLatestManifest, 1000 * 60 * 60)
const meta = await $fetch<NuxtAppManifestMeta>(joinURL(config.app.cdnURL || config.app.baseURL, config.app.buildAssetsDir, 'builds/latest.json'))
if (meta.id !== currentManifest.id) {
// There is a newer build which we will let the user handle
nuxtApp.hooks.callHook('app:manifest:update', meta)
}
}
onNuxtReady(() => { timeout = setTimeout(getLatestManifest, 1000 * 60 * 60) })
})