How does the vue front-end call the back-end interface?

The steps for the Vue front-end to call the back-end interface: Install the Axios library, create the Axios client, send HTTP requests: GET, POST, PUT, DELETE, etc. Process the response data: use .then() to process error information: use .catch ()

How does the Vue front-end call the back-end interface

To call the back-end interface from the Vue front-end, you can follow Following steps:

1. Using the Axios library

Axios is a popular JavaScript HTTP client library that simplifies communication with backend interfaces.

2. Install Axios

Install Axios in your Vue project:

<code class="bash">npm install axios</code>

3. Create Axios client

Create an Axios instance:

<code class="javascript">import axios from 'axios';

// 创建 Axios 客户端
const client = axios.create({
  baseURL: 'http://localhost:3000/api', // 你的后端 API 基 URL
});</code>

4. Send HTTP request

Use Axios client to send HTTP request:

<code class="javascript">// GET 请求
client.get('/users').then((response) => {
  // 处理响应数据
});

// POST 请求
client.post('/users', { name: 'John Doe' }).then((response) => {
  // 处理响应数据
});

// 其他 HTTP 方法（PUT、DELETE 等）的使用方式类似</code>

5. Processing the response

Once the server responds, the Axios client will return a Promise containing response data and metadata. You can use .then() to handle the response:

<code class="javascript">client.get('/users').then((response) => {
  // 响应数据存储在 response.data 中
  console.log(response.data);
});</code>

6. Error handling

If the request fails, Axios will return a Promise, including error message. You can use .catch() to handle errors:

<code class="javascript">client.get('/users').catch((error) => {
  // 错误信息存储在 error.response 中
  console.error(error.response);
});</code>

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