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The XMLHttpRequest.setRequestHeader() method sets the value of an HTTP request header. You must call setRequestHeader()
after open()
, but before send()
. If this method is called several times with the same header, the values are merged into one single request header.
void setRequestHeader( DOMString header, DOMString value );
For security reasons, some headers can only be controlled by the user agent. These headers include the forbidden header names and forbidden response header names.
Parameters
header
- The name of the header whose value is to be set.
value
- The value to set as the body of the header.
-
Specifications
Specification Status Comment XMLHttpRequest
The definition of 'setRequestHeader()' in that specification.Living Standard WHATWG living standard Browser compatibility
Feature Chrome Firefox (Gecko) Internet Explorer Opera Safari (WebKit) Basic support 1 ? 5[1]
7(Yes) 1.2 Feature Android Chrome for Android Firefox Mobile (Gecko) IE Mobile Opera Mobile Safari Mobile Basic support ? 1.0 (Yes) ? ? ? [1] This feature was implemented via ActiveXObject(). Internet Explorer implements the standard XMLHttpRequest since version 7.
See also
Using XMLHttpRequest