Nuxt/packages/vue-app/template/mixins/fetch.server.js

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import Vue from 'vue'
import { hasFetch, normalizeError, addLifecycleHook } from '../utils'
async function serverPrefetch() {
if (!this._fetchOnServer) {
return
}
// Call and await on $fetch
try {
await this.$options.fetch.call(this)
} catch (err) {
this.$fetchState.error = normalizeError(err)
}
this.$fetchState.pending = false
// Define an ssrKey for hydration
this._ssrKey = this.$ssrContext.nuxt.fetch.length
// Add data-ssr-key on parent element of Component
const attrs = this.$vnode.data.attrs = this.$vnode.data.attrs || {}
attrs['data-ssr-key'] = this._ssrKey
// Call asyncData & add to ssrContext for window.__NUXT__.fetch
this.$ssrContext.nuxt.fetch.push(this.$fetchState.error ? { _error: this.$fetchState.error } : this._data)
}
export default {
beforeCreate() {
if (!hasFetch(this)) {
return
}
if (typeof this.$options.fetchOnServer === 'function') {
this._fetchOnServer = this.$options.fetchOnServer.call(this) !== false
} else {
this._fetchOnServer = this.$options.fetchOnServer !== false
}
Vue.util.defineReactive(this, '$fetchState', {
pending: true,
error: null,
timestamp: Date.now()
})
addLifecycleHook(this, 'serverPrefetch', serverPrefetch)
}
}