https://github.com/github/fetch

Among countless others. Please don't bring in all of jQuery if you're just going to use one function from it.

http://youmightnotneedjquery.com/

var request = new XMLHttpRequest(); request.open('GET', '/my/url', true);

request.onload = function() { if (request.status >= 200 && request.status < 400) { // Success! var data = JSON.parse(request.responseText); } else { // We reached our target server, but it returned an error

  }

request.onerror = function() { // There was a connection error of some sort };

request.send();

OR

Even better, you should just use a reactive front end framework. https://vuejs.org/ combined with https://github.com/vuejs/vue-resource is currently my fave.