|  | <!DOCTYPE html> | 
|  | <html> | 
|  | <head> | 
|  | <title>XMLHttpRequest: setRequestHeader() - header value with whitespace</title> | 
|  | <script src="/resources/testharness.js"></script> | 
|  | <script src="/resources/testharnessreport.js"></script> | 
|  | <link rel="help" href="https://xhr.spec.whatwg.org/#the-setrequestheader()-method" data-tested-assertations="/following::ol/li[4]/p[contains(@class,'note')] /following::ol/li[6]" /> | 
|  | </head> | 
|  | <body> | 
|  | <div id="log"></div> | 
|  | <script> | 
|  | function request(value) { | 
|  | test(function() { | 
|  | var client = new XMLHttpRequest() | 
|  | client.open("POST", "resources/inspect-headers.py?filter_name=X-Empty", false) | 
|  | client.setRequestHeader('X-Empty', value) | 
|  | client.send(null) | 
|  | assert_equals(client.responseText, 'x-empty: '+ String(value.trim()).toLowerCase()+'\n' ) | 
|  | }, document.title + " (" + value + ")") | 
|  | } | 
|  | request(" ") | 
|  | request(" t") | 
|  | request("t ") | 
|  | request(" t ") | 
|  | </script> | 
|  | </body> | 
|  | </html> |