Quick and Simple XMLHttpRequest

xhr.js

window.xhr = function (url, callback, method, params) {
	if (typeof callback !== 'function' ) throw "no callback passed!";
	try {
		var xmlhttp  = new XMLHttpRequest() || new ActiveXObject("Microsoft.XMLHTTP");					
		xmlhttp.onreadystatechange = function () {
			if (xmlhttp.readyState == 4 && xmlhttp.status == 200) {
				callback(xmlhttp.responseText);
	    	}
  		};  		
  		xmlhttp.open(method||"GET", url, true);
		// uncomment line for laravel xhr requests. otherwise you get 419 error.
  		//xmlhttp.setRequestHeader('X-CSRF-TOKEN', document.head.querySelector('meta[name="csrf-token"]').getAttribute('content'));
		xmlhttp.send(params || '');
	} catch (e) {
		console.log('xhr', e);
	}
}

basic example:

xhr('/my-url', function (response) {
console.log(response);
});