This is not valid, and in most cases will result in a script not being loaded. Files whose MIME type is image contain image data. The subtype specifies which specific image file format the data represents. The following image types are used commonly enough to be considered safe for use on web pages:. The Image file type and format guide provides information and recommendations about when to use the different image formats.
Our media container formats guide provides a list of the file types that are commonly supported by web browsers, including information about what their special use cases may be, any drawbacks they have, and compatibility information, along with other details. The audio codec and video codec guides list the various codecs that web browsers often support, providing compatibility details along with technical information such as how many audio channels they support, what sort of compression is used, and what bit rates and so forth they're useful at.
The codecs used by WebRTC guide expands upon this by specifically covering the codecs supported by the major web browsers, so you can choose the codecs that best cover the range of browsers you wish to support. As for MIME types of audio or video files, they typically specify the container format file type. The optional codecs parameter can be added to the MIME type to further specify which codecs to use and what options were used to encode the media, such as codec profile, level, or other such information.
The most commonly used MIME types used for web content are listed below. This isn't a complete list of all the types that may be available, however. See the media container formats guide for that. As a multipart document format, it consists of different parts, delimited by a boundary a string starting with a double dash When the Partial Content status code is sent, this MIME type indicates that the document is composed of several parts, one for each of the requested ranges.
Like other multipart types, the Content-Type uses a boundary to separate the pieces. Each piece has a Content-Type header with its actual type and a Content-Range of the range it represents. For security reasons, most browsers do not allow setting a custom default action for such resources, forcing the user to save it to disk to use it.
Each browser performs MIME sniffing differently and under different circumstances. There are security concerns as some MIME types represent executable content.
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