Axios is a popular JavaScript library that allows you to make HTTP requests in a convenient and easy way. It is often used to interact with RESTful APIs, but can also be used to make requests to other types of servers. In this article, we will take a look at how to use axios and provide some code examples to help you get started.
First, let's start by installing axios. You can do this by running the following command in your terminal:
npm install axios
Once axios is installed, you can import it into your JavaScript file like this:
import axios from 'axios';
Now that we have axios imported, let's take a look at how to make a simple GET request. The following code will send a GET request to the specified URL and print the response to the console:
axios.get('https://jsonplaceholder.typicode.com/todos/1')
.then(response => {
console.log(response.data);
})
.catch(error => {
console.log(error);
});
You can also add options like headers, params, timeout and auth to the request.
axios.get('https://jsonplaceholder.typicode.com/todos/1', {
headers: {
'Content-Type': 'application/json'
},
params: {
id: 1
},
timeout: 1000,
auth: {
username: 'myusername',
password: 'mypassword'
}
})
.then(response => {
console.log(response.data);
})
.catch(error => {
console.log(error);
});
You can also make POST, PUT, DELETE requests using axios with similar syntax. Here is an example of a POST request:
axios.post('https://jsonplaceholder.typicode.com/todos', {
title: 'New Todo',
completed: false
})
.then(response => {
console.log(response.data);
})
.catch(error => {
console.log(error);
});
In addition to making individual requests, axios also provides a way to make multiple requests at the same time using the axios.all() method. This can be useful if you need to make several requests and don't want to wait for each one to complete before making the next one. Here is an example of how to use axios.all():
axios.all([
axios.get('https://jsonplaceholder.typicode.com/todos/1'),
axios.get('https://jsonplaceholder.typicode.com/todos/2')
])
.then(axios.spread((todo1, todo2) => {
console.log(todo1.data);
console.log(todo2.data);
}))
.catch(error => {
console.log(error);
});
You can also create an instance of axios with a custom config, and reuse it to make multiple requests.
In addition to making HTTP requests, Axios also provides some other useful features. One of these is the ability to cancel requests. This can be useful if you need to cancel a request that is taking too long or is no longer needed. To cancel a request, you can use the Cancel class from the axios package and pass it to the cancel property of the config object when making the request. Here is an example:
const CancelToken = axios.CancelToken;
const source = CancelToken.source();
axios.get('https://jsonplaceholder.typicode.com/todos/1', {
cancelToken: source.token
})
.then(response => {
console.log(response.data);
})
.catch(thrown => {
if (axios.isCancel(thrown)) {
console.log('Request canceled', thrown.message);
} else {
console.log(thrown);
}
});
// To cancel the request
source.cancel('Operation canceled by the user.');
Another feature provided by Axios is the ability to create and manage request interceptors. Interceptors are functions that can be used to modify or process requests and responses before they are sent or received. For example, you could use an interceptor to add an authentication token to every request. Here is an example of how to use an interceptor:
axios.interceptors.request.use(function (config) {
// Do something before request is sent
config.headers.Authorization = 'Bearer YOUR_TOKEN';
return config;
}, function (error) {
// Do something with request error
return Promise.reject(error);
});
axios.interceptors.response.use(function (response) {
// Do something with response data
return response;
}, function (error) {
// Do something with response error
return Promise.reject(error);
});
Lastly, Axios also provides the ability to create and manage an instance with a default config that can be reused across your application.
const instance = axios.create({
baseURL: 'https://jsonplaceholder.typicode.com',
headers: {'X-Custom-Header': 'foobar'}
});
instance.get('/todos/1')
.then(response => {
console.log(response.data);
})
.catch(error => {
console.log(error);
});
In conclusion, Axios is a powerful JavaScript library that makes it easy to make HTTP requests in a convenient and easy way. It also provides some additional features such as request canceling, interceptors, and instance management which can be useful in a variety of scenarios. With the examples provided in this article, you should now have a good understanding of how to use Axios and be able to start making HTTP requests in your own projects.
Popular questions
- What is Axios and what is it used for?
Axios is a popular JavaScript library that allows you to make HTTP requests in a convenient and easy way. It is often used to interact with RESTful APIs, but can also be used to make requests to other types of servers.
- How do you install Axios?
You can install Axios by running the following command in your terminal:
npm install axios
- How do you make a GET request using Axios?
You can make a GET request using Axios by calling the axios.get() method and passing in the URL of the resource you want to retrieve. Here is an example:
axios.get('https://jsonplaceholder.typicode.com/todos/1')
.then(response => {
console.log(response.data);
})
.catch(error => {
console.log(error);
});
- How can you cancel a request made with Axios?
You can cancel a request made with Axios by using the Cancel class from the axios package and passing it to the cancel property of the config object when making the request. Here is an example:
const CancelToken = axios.CancelToken;
const source = CancelToken.source();
axios.get('https://jsonplaceholder.typicode.com/todos/1', {
cancelToken: source.token
})
.then(response => {
console.log(response.data);
})
.catch(thrown => {
if (axios.isCancel(thrown)) {
console.log('Request canceled', thrown.message);
} else {
console.log(thrown);
}
});
source.cancel('Operation canceled by the user.');
- How can you create and manage an instance with a default config that can be reused across your application?
You can create and manage an instance with a default config that can be reused across your application by using the axios.create() method. This method takes in a config object and returns an instance of axios with that config. Here is an example:
const instance = axios.create({
baseURL: 'https://jsonplaceholder.typicode.com',
headers: {'X-Custom-Header': 'foobar'}
});
instance.get('/todos/1')
.then(response => {
console.log(response.data);
})
.catch(error => {
console.log(error);
});
Tag
HTTP
