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How can use jQuery's AJAX functions to make HTTP requests and handle JSON data returned from APIs?

Gautam Ramesh16623-Apr-2023

How can use jQuery's AJAX functions to make HTTP requests and handle JSON data returned from APIs?

jqueryajax jquery javascript json 
Updated on 11-Jun-2023
Gautam Ramesh

Gautam Ramesh

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I am Gautam Ramesh from Uttar Pradesh. Have completed my B. Tech. course from MNNIT campus Prayagraj in 2022. I have good knowledge of computer networking.

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1 Answers

Aryan Kumar

Aryan Kumar

11-Jun-2023

jQuery's AJAX functions can be used to make HTTP requests and handle JSON data returned from APIs. To make an HTTP request, you can use the .ajax() function. The .ajax() function takes a number of parameters, including the URL of the API, the type of request (GET, POST, PUT, or DELETE), and the data to be sent to the API.

For example, the following code makes a GET request to the /api/users endpoint of an API:

Code snippet

$.ajax({
  url: "/api/users",
  type: "GET",
});

The .ajax() function returns a jqXHR object. The jqXHR object has a number of properties, including the responseText property, which contains the response text from the API, and the status property, which contains the HTTP status code of the response.

To handle JSON data returned from an API, you can use the dataType property of the .ajax() function. The dataType property can be set to "json" to indicate that the response from the API is JSON data.

For example, the following code makes a GET request to the /api/users endpoint of an API and expects the response to be JSON data:

Code snippet

$.ajax({
  url: "/api/users",
  type: "GET",
  dataType: "json",
});

The .ajax() function will then parse the response text from the API and return a JavaScript object. The JavaScript object will contain the data returned from the API.

Here is an example of how to handle JSON data returned from an API:

Code snippet

$.ajax({
  url: "/api/users",
  type: "GET",
  dataType: "json",
  success: function(data) {
    // Do something with the data returned from the API.
  },
  error: function(xhr, textStatus, errorThrown) {
    // Handle errors.
  },
});

In the above code, the success callback function will be called when the request is successful and the data parameter will contain the JavaScript object with the data returned from the API. The error callback function will be called when the request fails and the xhr, textStatus, and errorThrown parameters will contain information about the error.

jQuery's AJAX functions provide a powerful way to make HTTP requests and handle JSON data returned from APIs. By using jQuery's AJAX functions, you can easily create web applications that interact with APIs.

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