send-response-upload-event-loadstart.htm (1387B)
1 <!DOCTYPE html> 2 <html> 3 <head> 4 <link rel="help" href="https://xhr.spec.whatwg.org/#handler-xhr-onloadstart" data-tested-assertations="../.." /> 5 <link rel="help" href="https://xhr.spec.whatwg.org/#event-xhr-loadstart" data-tested-assertations="../.." /> 6 <link rel="help" href="https://xhr.spec.whatwg.org/#the-send()-method" data-tested-assertations="following::ol[1]/li[8] following-sibling::ol/li[9]/ol/li[3]" /> 7 8 <script src="/resources/testharness.js"></script> 9 <script src="/resources/testharnessreport.js"></script> 10 <title>XMLHttpRequest: The send() method: Fire a progress event named loadstart on the XMLHttpRequestUpload (synchronous flag is unset)</title> 11 </head> 12 13 <body> 14 <div id="log"></div> 15 16 <script type="text/javascript"> 17 var test = async_test(); 18 19 test.step(function() 20 { 21 var xhr = new XMLHttpRequest(); 22 23 xhr.upload.onloadstart = function(e) 24 { 25 test.step(function() 26 { 27 assert_true(e instanceof ProgressEvent); 28 assert_equals(e.type, "loadstart"); 29 assert_equals(e.target, xhr.upload); 30 test.done(); 31 }); 32 }; 33 34 xhr.open("POST", "./resources/content.py", true); 35 xhr.send("Test Message"); 36 }); 37 </script> 38 </body> 39 </html>