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    <p><strong>New ways I: <code>fetch</code></strong></p> <p><strong><em>TL;DR</strong> I'd recommend this way as long as you don't have to send synchronous requests or support old browsers.</em></p> <p>A long as your request is asynchronous you can use the <a href="https://developer.mozilla.org/en-US/docs/Web/API/Fetch_API" rel="noreferrer">Fetch API</a> to send HTTP requests. The fetch API works with <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Using_promises" rel="noreferrer">promises</a>, which is a nice way to handle asynchronous workflows in JavaScript. With this approach you use <code>fetch()</code> to send a request and <code>ResponseBody.json()</code> to parse the response:</p> <pre><code>fetch(url) .then(function(response) { return response.json(); }) .then(function(jsonResponse) { // do something with jsonResponse }); </code></pre> <p><em>Compatibility: The Fetch API is not supported by IE11 as well as Edge 12 &amp; 13. However, there are <a href="https://github.com/github/fetch" rel="noreferrer">polyfills</a>.</em></p> <p><strong>New ways II: <code>responseType</code></strong></p> <p>As <a href="https://stackoverflow.com/users/834003/londeren">Londeren</a> has written in <a href="https://stackoverflow.com/a/45501836/398844">his answer</a>, newer browsers allow you to use the <code>responseType</code> property to define the expected format of the response. The parsed response data can then be accessed via the <code>response</code> property:</p> <pre><code>var req = new XMLHttpRequest(); req.responseType = 'json'; req.open('GET', url, true); req.onload = function() { var jsonResponse = req.response; // do something with jsonResponse }; req.send(null); </code></pre> <p><em>Compatibility: <code>responseType = 'json'</code> is not supported by IE11.</em></p> <p><strong>The classic way</strong></p> <p>The standard XMLHttpRequest has no <code>responseJSON</code> property, just <code>responseText</code> and <code>responseXML</code>. As long as bitly really responds with some JSON to your request, <code>responseText</code> should contain the JSON code as text, so all you've got to do is to parse it with <code>JSON.parse()</code>:</p> <pre><code>var req = new XMLHttpRequest(); req.overrideMimeType("application/json"); req.open('GET', url, true); req.onload = function() { var jsonResponse = JSON.parse(req.responseText); // do something with jsonResponse }; req.send(null); </code></pre> <p><em>Compatibility: This approach should work with any browser that supports <code>XMLHttpRequest</code> and <code>JSON</code>.</em></p> <p><strong>JSONHttpRequest</strong></p> <p>If you prefer to use <code>responseJSON</code>, but want a more lightweight solution than JQuery, you might want to check out my JSONHttpRequest. It works exactly like a normal XMLHttpRequest, but also provides the <code>responseJSON</code> property. All you have to change in your code would be the first line:</p> <pre><code>var req = new JSONHttpRequest(); </code></pre> <p>JSONHttpRequest also provides functionality to easily send JavaScript objects as JSON. More details and the code can be found here: <a href="http://pixelsvsbytes.com/2011/12/teach-your-xmlhttprequest-some-json/" rel="noreferrer">http://pixelsvsbytes.com/2011/12/teach-your-xmlhttprequest-some-json/</a>.</p> <p><em>Full disclosure: I'm the owner of Pixels|Bytes. I think my script is a good solution to the problem, so I posted it here. Please leave a comment, if you want me to remove the link.</em></p>
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    1. COpixelsvsbytes.com it's really worth to read
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    2. CO+1; IMO this was the real answer to the question - no jQuery just plain old vanilla ```XMLHttpRequest```; just what the question was about.
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