The fetch() method is used to send the requests to the server without refreshing the page. It is an alternative to the
The basic syntax of a fetch() request is as follows:
The difference between XMLHttpRequest and fetch is that fetch uses Promises which are easy to manage when dealing with multiple asynchronous operations where callbacks can create callback hell leading to unmanageable code.
However there are still some browsers that do not support fetch() method, so for those, we have to stick with the XMLHttpRequest object.
A fetch() method can be used with many type of reuqests such as POST, GET, PUT and DELETE.
GET method using fetch API:
In this example, we are going to use JSONPlaceholder which provides REST API get and post random data such as posts, users, etc.
First of all, create an HTML file with the following code:
Now, when you open the HTML file you’ll see the result as follows:
When you open DevTools in Chrome (Press
F12) you’ll see that a fetch request has been made to the route users.
You can get more data from the request, refer to the documentation.
POST request using fetch API:
The post request is widely used to submit forms to the server. Fetch also supports the POST method call. To do a POST request we need to specify additional parameters with the request such as method, headers, etc.
In this example, we’ll do a POST request on the same JSONPlaceholder and add a post in the posts. It’ll then return the same post content with an ID.
The API returns a status of 201 which is a HTTP status code for Created.
- jQuery | post() Method
- Fetch API
- PHP program to fetch data from localhost server database using XAMPP
- Perl | GET vs POST in CGI
- HTTP GET and POST Methods in PHP
- How to receive JSON POST with PHP
- How to display bootstrap carousel with three post in each slide?
- Tracxn Experienced Interview (3yrs SSE post)
- Python | Automating Happy Birthday post on Facebook using Selenium
- How to select and upload multiple files with HTML and PHP, using HTTP POST?
- Method within method in java
- A-Buffer Method
- jQuery | is() Method
- HTML | DOM contains() Method
- jQuery | die() Method
If you like GeeksforGeeks and would like to contribute, you can also write an article using contribute.geeksforgeeks.org or mail your article to email@example.com. See your article appearing on the GeeksforGeeks main page and help other Geeks.
Please Improve this article if you find anything incorrect by clicking on the "Improve Article" button below.