Abort previous pending XHR when navigating

lib/send-request.js

@@ -0,0 +1,46 @@
+module.exports = function(location, options, callback) {
+  options = options || {};
+  var requestMethod = options.requestMethod || "GET";
+  var requestPayload = options.requestPayloadString || null;
+  var request = new XMLHttpRequest()
+
+  request.onreadystatechange = function() {
+    if (request.readyState === 4) {
+      if (request.status === 200) {
+        callback(request.responseText, request)
+      }
+      else {
+        callback(null, request)
+      }
+    }
+  }
+
+  request.onerror = function(e) {
+    console.log(e)
+    callback(null, request)
+  }
+
+  request.ontimeout = function() {
+    callback(null, request)
+  }
+
+  // Add a timestamp as part of the query string if cache busting is enabled
+  if (this.options.cacheBust) {
+    location += (!/[?&]/.test(location) ? "?" : "&") + new Date().getTime()
+  }
+
+  request.open(requestMethod.toUpperCase(), location, true)
+  request.timeout = options.timeout
+  request.setRequestHeader("X-Requested-With", "XMLHttpRequest")
+  request.setRequestHeader("X-PJAX", "true")
+
+  // Add the request payload if available
+  if (options.requestPayloadString != undefined && options.requestPayloadString != "") {
+    // Send the proper header information along with the request
+    request.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
+  }
+
+  request.send(requestPayload)
+
+  return request
+}