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XMLHttpRequest.setRequestHeader()

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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

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