How does Vue use the interface provided by the backend?

Using the backend interface in Vue

Using the interface provided by the backend in a Vue.js application allows you to communicate with the server, obtain and update data. This article will introduce how to use the backend interface in Vue.

1. Install Axios

First, you need to install the Axios library, which is a JavaScript library for making HTTP requests. Execute the following command in the terminal:

<code>npm install axios</code>

Then, import Axios in your Vue.js file:

<code class="js">import axios from 'axios'</code>

2. Create a request

To create an HTTP request, please Use the axios object:

<code class="js">axios.get('api/todos')
  .then(response => {
    // 处理成功的响应
  })
  .catch(error => {
    // 处理请求错误
  })</code>

get method is used to send GET requests, post method is used to send POST requests, and so on.

3. Pass data

To pass data to the backend, use the data option:

<code class="js">axios.post('api/todos', {
  title: '学习 Vue.js'
})
  .then(response => {
    // 处理成功的响应
  })
  .catch(error => {
    // 处理请求错误
  })</code>

4. Process the response

The successful response contains the data attribute, which contains the data returned by the backend.

<code class="js">axios.get('api/todos')
  .then(response => {
    const todos = response.data;
    // 使用 todos 数据
  })
  .catch(error => {
    // 处理请求错误
  })</code>

5. Using Vuex

Vuex is a state management library that helps you manage and share data in Vue.js applications. You can use Vuex to manage data fetched from the backend and access it through components.

To use Vuex, you need to create a Vuex store:

<code class="js">import Vuex from 'vuex'
import { createStore } from 'vuex'

const store = createStore({
  state: {
    todos: []
  },
  actions: {
    getTodos({ commit }) {
      axios.get('api/todos')
        .then(response => {
          commit('setTodos', response.data)
        })
        .catch(error => {
          // 处理请求错误
        })
    }
  },
  mutations: {
    setTodos(state, todos) {
      state.todos = todos
    }
  }
})</code>

Then, you can use the mapState and mapActions helper functions in the component to Access Vuex storage:

<code class="js">import { mapState, mapActions } from 'vuex'

export default {
  computed: {
    ...mapState(['todos'])
  },
  methods: {
    ...mapActions(['getTodos'])
  }
}</code>

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