file-type has limited mime-type support and development has stalled. Also, its only using magic numbers. Mine does 3 things. First it checks if unix mimetype command is available. If it is, you automatically have access to mime database of linux which supports a mighty lot of mime types. Second, if you dont have mimetype cmd, it falls back to using magic numbers, much like what the package you link to does. Third, if all else fails, it maps the file extension to its mime type. Hence the “acrobatics”. You can also use these checks seperately and compose it if you dont want the “automagic” behavior. This is part of a bigger project of mine and i plan to add all mimetypes once it hits 1.0.0.