Why fetch() API method is used?
The fetch() method is used to send the requests to the server without refreshing the page. It is an alternative to the XMLHttpRequest object. We will be taking a fake API which will contain Array as an example and from that API we will show to DELETE data by fetch API method by making custom HTTP library. The API used in this tutorial is: https://jsonplaceholder.typicode.com/users/2
Explanation: First we need to create index.html file and paste the below code of index.html file into that. The index.html file includes
library.js and app.js files at the bottom of the body tag. Now in library.js file, first create an ES6 class DeleteHTTP and within that class, there is async fetch() function which DELETES the data from the api. There are two stages of await. First for fetch() and then for its response. Whatever response we receive, we return it to the calling function in app.js file.
Now in app.js file, first instantiate DeleteHTTP class. Then by http.delete prototype function send URL to the library.js file. Further, in this, there are two promises to be resolved. The first is for any response data and the second is for any error.
Output: Open index.html file in the browser then right click-> inspect element->console. The following output you will see for DELETE request: