How to Consume APIs from a Server using Vuex and Axios

How to Consume APIs from a Server using Vuex and Axios

Learn how to consume APIs from a server using Vuex and Axios. “Consuming” an API means to receive requests and send responses via an API. What state management is, and when to use Vuex for your Vue applications.

Learn how to consume APIs from a server using Vuex and Axios, what state management is, and when to use Vuex for your Vue applications.

An application programming interface (API) is a set of programming standards for accessing an application. This means that with an API, your backend and frontend applications can communicate with each other without the knowledge of the user.

“Consuming” an API means to receive requests and send responses via an API. In this article, you’ll learn how to consume APIs from a server using Vuex and Axios.

Introducing Axios and Vuex

Some frameworks, such as Angular 2, JQuery, and, until version 2.0, Vue.js, come with built-in HTTP APIs. In Vue.js 2.0, the developers decided that the built-in HTTP client module, Vue-resource, was no longer essential and could be replaced by third-party libraries. Now, the most recommended library is Axios.

Axios is a flexible HTTP client library that uses promises by default and runs on both the client and the server, which makes it appropriate for fetching data during server-side rendering. It’s easy to use with Vue.js.

Passing props can be difficult or almost impossible for deeply nested components. It can be tempting to use direct parent/child instance references or try to mutate and synchronize multiple copies of the state via events. Neither of these options are recommended because they may lead to unmaintainable code and bugs.

Vuex is a state management pattern and library for Vue.js applications. It serves as a centralized store for all the components in an application.

components state management actions and mutations

When to use Vuex

If you have never built a large-scale single page application (SPA), using Vuex may feel too complicated and unnecessary. But if you are building a medium- to large-scale SPA, chances are you have run into situations that make you think about how to better handle state and share state between components. If so, Vuex is the right tool for you!

Why you should use Vuex

Typically, you’ll want to use Vuex:

  • If your components need to share and update state
  • Because Vuex provides a single source of truth for data/state
  • Because there’s no need to pass events from one component and down through multiple components when you have state management
  • Because global state is reactive, which means altering state allows it to be updated in every other component using it

Understanding state management and the Vuex state management pattern

State management is the management of the state of the application or, more importantly, the data that should be presented to the user at any given time.

In an SPA like Vue.js, multiple components may, at any given time, interact with and change the data before sending it back to the server. Therefore, developers need a way to manage these changes — “the state” — which can be done with Vuex state management.

Vuex is a state management pattern that lets you extract shared state out of components, manage it in a global singleton, and allow components access to the state or trigger actions, no matter where they are in the tree.

How to set up the simplest Vuex store structure

You’ll need Vue CLI to create your Vue app. If you don’t have Vue CLI installed already, run the following in your terminal:

npm install -g @vue/cli

To see if Vue CLI is already installed on your system, execute the code below. A Vue version should appear if Vue is already installed.

vue --version
2.9.6

Now, create a Vue project by running the following code in your terminal:

/** if you want to create the vue project in the folder you
are currently on, use this code**/
vue create .

/**if you want to create a new folder for your vue app,
you should use this code**/
vue create myApp

/**if you are using Vue CLI version lesser than 3.0 use this code.**/
vue-init webpack myApp

Next, answer the questions as shown in the image below to create your Vue app:Consuming an API with Vuex and Axios

Then, install dependencies required for the project with the following codes:

/** to install vuex store for the project**/
npm install vuex

/**to install axios for handling http requests**/
npm install axios

Set up a simple Vuex store structure

First, create a folder in your src folder and name it store. In your store folder, create a file and name it index.js.

├── index.html
└── src
    ├── components
    ├── App.vue
    └──store
       └── index.js        ## where we assemble modules and export the store

Next, in your store/index.js file, input the following code:

// import dependency to handle HTTP request to our back end
import axios from 'axios'

//to handle state
const state = {}

//to handle state
const getters = {}

//to handle actions
const actions = {}

//to handle mutations
const mutations = {}

//export store module
export default {
    state,
    getters,
    actions,
    mutations
}
/** we have just created a boiler plate for our vuex store module**/

Register your store by adding the following codes to your main.js file:

//add this line to your main.js file
import store from './store'

new Vue({
//add this line to your main.js file
store,
render: h => h(App)
})
//other lines have already been added to your main.js file by default

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