The type of the body, where:

• "bytes" - the body is provided as a promise which resolves to an Uint8Array. This is essentially a "raw" body type.
• "form" - the body was decoded as a form with the contents provided as a promise which resolves with a URLSearchParams.
• "form-data" - the body was decoded as a multi-part form data and the contents are provided as a promise which resolves with a FormDataReader.
• "json" - the body was decoded as JSON, where the contents are provided as the result of using JSON.parse() on the string contents of the body.
• "text" - the body was decoded as text, where the contents are provided as a string.
• "reader" - the body is provided as Deno.Reader interface for reading the "raw" body.
• "stream" - the body is provided as a ReadableStream<Uint8Array> for reading the "raw" body.
• "undefined" - there is no request body or it could not be decoded.