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XMLHttpRequest.overrideMimeType

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The XMLHttpRequest method overrideMimeType() specifies a MIME type other than the one provided by the server to be used instead when interpreting the data being transferred in a request. This may be used, for example, to force a stream to be treated and parsed as "text/xml", even if the server does not report it as such. This method must be called before calling send().

Syntax

XMLHttpRequest.overrideMimeType(mimeType)

Parameters

mimeType: A DOMString specifying the MIME type to use instead of the one specified by the server. If the server doesn't specify a type, XMLHttpRequest assumes "text/xml".

Return value

undefined.

Example

This example specifies a MIME type of "text/plain", overriding the server's stated type for the data being received.

Note: If the server doesn't provide a Content-Type header, XMLHttpRequest assumes that the MIME type is "text/xml". If the content isn't valid XML, an "XML Parsing Error: not well-formed" error occurs. You can avoid this by calling overrideMimeType() to specify a different type.

// Interpret the received data as plain text

req = new XMLHttpRequest();
req.overrideMimeType("text/plain");
req.addEventListener("load", callback, false);
req.open("get", url);
req.send();

Specifications

Specification	Status	Comment
XMLHttpRequest The definition of 'overrideMimeType()' in that specification.	Living Standard	WHATWG living standard

Browser compatibilityUpdate compatibility data on GitHub

	Desktop
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari
Basic support	1	12	Yes	11 11 5 Implemented via `ActiveXObject`	Yes	1.2

	Mobile
	Android webview	Chrome for Android	Edge Mobile	Firefox for Android	Opera for Android	iOS Safari	Samsung Internet
Basic support	Yes	18	Yes	Yes	Yes	Yes	Yes