|  | <!doctype html> | 
|  | <html> | 
|  | <head> | 
|  | <title>XMLHttpRequest: loadstart event</title> | 
|  | <script src="/resources/testharness.js"></script> | 
|  | <script src="/resources/testharnessreport.js"></script> | 
|  | <link rel="help" href="https://xhr.spec.whatwg.org/#handler-xhr-onloadstart" data-tested-assertations="../.." /> | 
|  | <link rel="help" href="https://xhr.spec.whatwg.org/#event-xhr-loadstart" data-tested-assertations="../.." /> | 
|  | <link rel="help" href="https://xhr.spec.whatwg.org/#the-send()-method" data-tested-assertations="following-sibling::ol/li[9]/ol/li[2]" /> | 
|  | </head> | 
|  | <body> | 
|  | <div id="log"></div> | 
|  | <script> | 
|  | var test = async_test(); | 
|  | test.step(function() { | 
|  | var client = new XMLHttpRequest(); | 
|  | client.onloadstart = test.step_func(function(e) { | 
|  | assert_true(e instanceof ProgressEvent); | 
|  | assert_equals(e.type, "loadstart"); | 
|  | assert_equals(client.readyState, 1); | 
|  | test.done(); | 
|  | }); | 
|  | setTimeout(test.step_func(function () { | 
|  | assert_unreached("onloadstart not called after 500 ms"); | 
|  | }), 500); | 
|  | client.open("GET", "resources/well-formed.xml"); | 
|  | client.send(null); | 
|  | }); | 
|  | </script> | 
|  | </body> | 
|  | </html> |