JavaScriptCollection
diff --git a/‎d3.js‎
Lines changed: 8 additions & 7 deletions b/‎d3.js‎
Lines changed: 8 additions & 7 deletions
@@ -390,13 +390,14 @@
     return n ? Math.round(x * (n = Math.pow(10, n))) / n : Math.round(x);
   };
   d3.xhr = function(url, mimeType, callback) {
-    var xhr = {}, dispatch = d3.dispatch("progress", "load", "error"), headers = {}, response = d3_identity, request = new XMLHttpRequest();
-    request.onreadystatechange = function() {
-      if (request.readyState === 4) {
-        var s = request.status;
-        !s && request.response || s >= 200 && s < 300 || s === 304 ? dispatch.load.call(xhr, response.call(xhr, request)) : dispatch.error.call(xhr, request);
-      }
+    var xhr = {}, dispatch = d3.dispatch("progress", "load", "error"), headers = {}, response = d3_identity, request = new (window.XDomainRequest && /^(http(s)?:)?\/\//.test(url) ? XDomainRequest : XMLHttpRequest)();
+    "onload" in request ? request.onload = request.onerror = respond : request.onreadystatechange = function() {
+      request.readyState > 3 && respond();
     };
+    function respond() {
+      var s = request.status;
+      !s && request.responseText || s >= 200 && s < 300 || s === 304 ? dispatch.load.call(xhr, response.call(xhr, request)) : dispatch.error.call(xhr, request);
+    }
     request.onprogress = function(event) {
       var o = d3.event;
       d3.event = event;
@@ -430,7 +431,7 @@
       if (arguments.length === 2 && typeof data === "function") callback = data, data = null;
       request.open(method, url, true);
       if (mimeType != null && !("accept" in headers)) headers["accept"] = mimeType + ",*/*";
-      for (var name in headers) request.setRequestHeader(name, headers[name]);
+      if (request.setRequestHeader) for (var name in headers) request.setRequestHeader(name, headers[name]);
       if (mimeType != null && request.overrideMimeType) request.overrideMimeType(mimeType);
       if (callback != null) xhr.on("error", callback).on("load", function(request) {
         callback(null, request);