Introduction

CORS (Cross-Origin Resource Sharing) errors can occur when making requests from a Vue.js application to a different domain. Handling CORS errors is crucial for ensuring that your application can access resources from other domains. In this guide, we'll explore how to handle CORS errors in Vue.js and provide sample code to demonstrate the process.

Sample Code

Let's create a Vue.js application and implement error handling for CORS errors:

<div id="app">
  <button @click="fetchData">Fetch Data</button>
  <p v-if="errorMessage">{{ errorMessage }}</p>
const app = new Vue({
  el: '#app',
  data: {
    errorMessage: null,
  },
  methods: {
    fetchData() {
      fetch('https://api.example.com/data')
        .then(response => {
          if (!response.ok) {
            throw new Error('Network response was not ok');
          }
          return response.json();
        })
        .then(data => {
          this.errorMessage = null;
          // Process and use the fetched data here
        })
        .catch(error => {
          if (error.name === 'TypeError' && error.message === 'Failed to fetch') {
            this.errorMessage = 'CORS error: Check the server-side CORS configuration.';
          } else {
            this.errorMessage = 'An error occurred while fetching data.';
          }
        });
    },
  },
});
            

In this code:

• We create a Vue component that contains a button to fetch data and a paragraph to display error messages.
• The `fetchData` method uses the `fetch` API to make a request to an external API.
• We handle CORS errors by checking the response's status and providing appropriate error messages.
• If a network or CORS error occurs, we display a relevant error message to the user.