Vue HTTP Requests

Vue HTTP Requests (API Calls)

In Vue.js, HTTP requests are used to communicate with backend servers or APIs to:

Fetch data (GET)
Send data (POST)
Update data (PUT / PATCH)
Delete data (DELETE)

Vue itself does not include an HTTP library, so we commonly use:

Axios (most popular)
Browser Fetch API

Where to Make HTTP Requests in Vue?

Best places:

mounted() lifecycle hook
created() lifecycle hook
watch (when reacting to data changes)
Methods (on button click, form submit)

Using Axios in Vue (Recommended)

Install Axios

Basic GET Request

<script>
import axios from 'axios'

export default {
data() {
return {
users: [],
loading: false
}
},
async mounted() {
this.loading = true
const response = await axios.get('https://jsonplaceholder.typicode.com/users')
this.users = response.data
this.loading = false
}
}
</script>




<ul>
<li v-for="user in users" :key="user.id">
{{ user.name }}
</li>
</ul>

import axios from 'axios'

export default {

data() {

return {

users: [],

loading: false

}

async mounted() {

this.loading = true

const response = await axios.get('https://jsonplaceholder.typicode.com/users')

this.users = response.data

this.loading = false

}

</script>

<ul>

</li>

</ul>

POST Request (Send Data)

With async/await:

PUT / PATCH Request (Update Data)

DELETE Request

Handling Errors

Always handle errors
Show user-friendly messages

Using Fetch API (Alternative)

Axios is preferred because:

Automatic JSON parsing
Better error handling
Interceptors support

HTTP Requests with Methods (Button Click)

HTTP Requests with Watchers

Great for search & filters

Axios Global Configuration (Best Practice)

Or create instance:

API Service Pattern (Scalable Apps)

Keeps components clean
Easy to maintain

Loading & UI States

Essential for good UX

Common Mistakes

API calls inside computed properties
No error handling
Direct API calls everywhere
Not canceling unnecessary requests

Best Practices

Use Axios
Centralize API logic
Handle loading & error states
Use async/await
Secure tokens properly

Summary Table

Task	Method
Fetch data	`axios.get()`
Send data	`axios.post()`
Update data	`put()` / `patch()`
Delete data	`axios.delete()`
Best hook	`mounted()`
Large apps	API service layer

Conclusion

HTTP requests are the bridge between your Vue frontend and backend APIs.
Mastering Axios + proper architecture is crucial for real-world Vue applications.

Vue HTTP Requests