The JavaScript fetch() function.

The fetch() function in JavaScript is used to make network requests to a server and retrieve data. It returns a promise that resolves to the Response object representing the response to the request. You can use this function to make HTTP requests and receive data from APIs or other web services.

Can the JavaScript fetch() function be replaced by Axios?

Yes, the fetch() function in JavaScript can be replaced by the Axios library, which is a popular HTTP client for making network requests in JavaScript. Axios provides a simple and easy-to-use API for making HTTP requests and handling responses. It also includes features like request and response interception, automatic transformation of request and response data, and more. However, it’s worth noting that Axios is an external library and requires installation, while fetch() is built into modern browsers and does not require any additional installation.

What are Some of the Javascript inbuilt functionalities for REST API calls?

JavaScript does not have any inbuilt functionalities for making REST API calls. However, modern browsers provide the fetch() function, which is a built-in method for making network requests to REST APIs. With fetch(), you can make GET, POST, PUT, DELETE, and other HTTP requests to RESTful web services.

In addition to fetch(), there are also many third-party libraries and frameworks available for making REST API calls in JavaScript, like Axios, jQuery, and SuperAgent. These libraries provide additional features like request and response interception, automatic data transformation, and more.

Here are some examples of making REST API calls in JavaScript using the fetch() function:

// Rest Get Request

fetch('https://api.example.com/data')
  .then(response => response.json())
  .then(data => console.log(data))
  .catch(error => console.error(error));

// Rest Post Request

fetch('https://api.example.com/data', {
  method: 'POST',
  headers: {
    'Content-Type': 'application/json'
  },
  body: JSON.stringify({ name: 'John', age: 30 })
})
  .then(response => response.json())
  .then(data => console.log(data))
  .catch(error => console.error(error));


// Rest Update Request
fetch('https://api.example.com/data/1', {
  method: 'PUT',
  headers: {
    'Content-Type': 'application/json'
  },
  body: JSON.stringify({ name: 'John', age: 31 })
})
  .then(response => response.json())
  .then(data => console.log(data))
  .catch(error => console.error(error));


//Rest Delete Request
fetch('https://api.example.com/data/1', {
  method: 'DELETE'
}) .then(response => console.log('Data deleted'))
  .catch(error => console.error(error));

Happy learning…..