Web/API/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
XMLHttpRequestThe definition of 'overrideMimeType()' in that specification.	Living Standard	WHATWG living standard

Browser compatibility

Update compatibility data on GitHub

	Desktop						Mobile
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet
`overrideMimeType`	Chrome Full support 1	Edge Full support 12	Firefox Full support Yes	IE Full support 11 Full support 11 Full support 5 Notes' Notes' Implemented via `ActiveXObject`	Opera Full support Yes	Safari Full support 1.2	WebView Android Full support Yes	Chrome Android Full support 18	Firefox Android Full support Yes	Opera Android Full support Yes	Safari iOS Full support Yes	Samsung Internet Android Full support 1.0

Legend

Full support: Full support
See implementation notes.': See implementation notes.