Fetch\Enum\ContentType

ContentType is a backed string enum covering JSON variants, forms, multipart, text, HTML, XML, binary, common files, event streams, and NDJSON. Convert exactly with fromString() or safely with tryFromString(). normalizeContentType() returns a matching enum when known and leaves an unknown string unchanged.

Category methods include isJson(), isForm(), isMultipart(), isText(), isEventStream(), and isStreamable(). Matching uses the enum's declared MIME strings; response content types may include parameters, so use a response's hasJsonContent() helper for response inspection.