Vanilla JavaScript $.getJSON version with callback

// Remember XHMLHTTP requests are asynchronous!! function getJSON(url, callback) { var xhr = new XMLHttpRequest();"GET", url, true); xhr.onload = function (e) { if (xhr.readyState === 4) { if (xhr.status === 200) { var res = xhr.responseText; // Executes your callback with the // response already parsed into JSON callback(JSON.parse(res)); } else { // Server responded with some error console.error(xhr.statusText); } // End of verifying response status } // Please read: // .../ajax_xmlhttprequest_onreadystatechange.asp }; // End of what to do when the response is answered // What to do if there's an error with the request xhr.onerror = function (e) { console.error(xhr.statusText); }; // End of error handling // Send the request to the server xhr.send(null); } // End of getJSON function //================================================// // EXAMPLE OF USE WITH GITHUB API // //================================================// var apiURL = ""; getJSON(apiURL, function(userInfo) { console.log(userInfo); }); // End of request // -> You should now see an object that contains info // about my github account profile.
How to do a simple getJSON replacement for vanilla javascript without the need of Angular's HTTP module or jQuery's $.getJSON method. Careful, this does not work (apparently) with JSONP requests.

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