How to Extract JSON Data from a URL Using JavaScript?

Retrieving JSON Data from a URL Using JavaScript

This article addresses the issue of extracting JSON data from a specific URL. The provided URL returns JSON in the following format:

<code class="json">{
  query: {
    count: 1,
    created: "2015-12-09T17:12:09Z",
    lang: "en-US",
    diagnostics: {},
    ...
  }
}</code>

Attempts to access the JSON object using the following code were unsuccessful:

<code class="js">responseObj = readJsonFromUrl('http://query.yahooapis.com/v1/publ...');
var count = responseObj.query.count;

console.log(count) // should be 1</code>

Solution:

To obtain a JavaScript object from the URL's JSON response, one can utilize jQuery's .getJSON() function:

<code class="js">$.getJSON('http://query.yahooapis.com/v1/public/yql?q=select%20%2a%20from%20yahoo.finance.quotes%20WHERE%20symbol%3D%27WRC%27&amp;format=json&amp;diagnostics=true&amp;env=store://datatables.org/alltableswithkeys&amp;callback', function(data) {
    // JSON result in `data` variable
});</code>

Alternatively, for a pure JavaScript solution, consider the following answer:

<code class="js">// Create a new XMLHttpRequest object
var xhr = new XMLHttpRequest();

// Open a GET request to the specified URL
xhr.open('GET', 'http://query.yahooapis.com/v1/public/yql?q=select%20%2a%20from%20yahoo.finance.quotes%20WHERE%20symbol%3D%27WRC%27&amp;format=json&amp;diagnostics=true&amp;env=store://datatables.org/alltableswithkeys&amp;callback', true);

// Set the response type to JSON
xhr.responseType = 'json';

// Send the request
xhr.send();

// Handle the response
xhr.onload = function() {
    if (xhr.status === 200) {
        // The request was successful
        var data = xhr.response;

        // Access the JSON data as needed
        console.log(data.query.count);
    } else {
        // The request failed
        console.log('Error: ' + xhr.status);
    }
};</code>

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