Check if a browser supports a specific MIME type?

How can i check if the browser supports a specific mime type wi开发者_C百科th php?

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You could analyze the Accept header field to see if the type or a superset of that type is listed.

But notice that Accept is a list of rated values and a quality value of 0 means not accepted. And browsers send different Accept values based on their expectations for that resource (e.g. a resource referenced in IMG element is expected to be an element of image/*).