Vue error: Unable to use axios to send request correctly, how to solve it?

Vue error: Unable to use axios to send requests correctly, how to solve it?

It is a very common operation to use axios to send HTTP requests in Vue projects. However, sometimes we may encounter some problems, such as being unable to use axios to send requests correctly, and at this time we need to find a solution.

The following are some common problems that may occur and their corresponding solutions:

Problem 1: Axios cannot be introduced correctly

Solution: First, make sure you have installed it through npm If you have axios dependency, you can install it through the command npm install axios --save. Then in your Vue component, use import axios from 'axios' to introduce the axios library. Make sure there are no issues with the path and naming. If you still cannot import it, you can try to reinstall axios, or check whether axios exists in the node_modules folder in the root directory of your project.

Problem 2: Unable to send request

Solution: First, make sure your network is available. If your network is unavailable, then naturally the request cannot be sent. Secondly, check whether your request URL is correct and make sure there is no error in your API interface address. In addition, check whether your HTTP request method is correct, that is, whether the correct method (such as get, post, etc.) is used when sending the request through axios.

The following is a sample code that uses axios to send a GET request:

import axios from 'axios'

axios.get('api_url_here')
  .then(response => {
    console.log(response.data)
  })
  .catch(error => {
    console.log(error)
  })

Problem 3: Cross-domain problem

Solution: When your interface address is different from your front-end project When the addresses are not under the same domain name, you may encounter cross-domain problems. You can allow cross-domain access by setting response headers in the background interface, or use a proxy method to solve cross-domain problems.

The following is an example of using axios to send a POST request, and using a proxy method to solve cross-domain problems:

// vue.config.js

module.exports = {
  devServer: {
    proxy: {
      '/api': {
        target: 'http://api.example.com',
        changeOrigin: true
      }
    }
  }
}

// Vue组件

import axios from 'axios'

axios.post('/api/login', {
  username: 'example',
  password: '123456'
})
  .then(response => {
    console.log(response.data)
  })
  .catch(error => {
    console.log(error)
  })

Summary:

When you encounter the problem of not being able to use axios to send correctly When requesting problems, first ensure that the axios library is correctly introduced, and then check whether the network, URL and HTTP request methods are correct. If you encounter cross-domain problems, you can solve them by setting response headers or using a proxy. I hope the above solutions can help you solve the problem.

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