Nuxt/examples/async-data/README.md

Async data with Nuxt.js

data (context)

Nuxt.js supercharges the data method from vue.js to let you handle async operation before setting the real component data.

data is called every time before loading the component (only if attached to a route). It can be called from the server-side or before navigating to the corresponding route.

The data method receives the context as the first argument, you can use it to fetch some data and return the component data. To make the data method asynchronous, return a Promise, nuxt.js will wait for the promise to be resolved before rendering the Component.

For example:

export default {
  data ({ params }) {
    return axios.get(`http://my-api/posts/${params.id}`)
    .then((res) => {
      return { title: res.data.title }
    })
  }
}

And then, you can display the data inside your template:

<template>
  <h1>{{ title }}</h1>
</template>

Context

List of all the available keys in context:

Key	Type	Available	Description
isClient	Boolean	Client & Server	Boolean to let you know if you're actually renderer from the client-side
isServer	Boolean	Client & Server	Boolean to let you know if you're actually renderer from the server-side
route	vue-router route	Client & Server	vue-router route instance see documentation
store	vuex store	Client & Server	Vuex.Store instance. Available only if store: true is set in nuxt.config.js
params	Object	Client & Server	Alias of route.params
query	Object	Client & Server	Alias of route.query
req	http.Request	Server	Request from the node.js server. If nuxt is used as a middleware, the req object might be different depending of the framework you're using.
res	http.Response	Server	Response from the node.js server. If nuxt is used as a middleware, the res object might be different depending of the framework you're using.

Demo

npm install
npm start

Go to http://localhost:3000 and navigate inside the app.