MIME Types Utility for React Native

react-native-mime-types is a focused utility for identifying and managing MIME (Multipurpose Internet Mail Extensions) types within React Native applications. It provides core functions like `lookup` to determine content types from file extensions or paths, `contentType` to construct full Content-Type headers, and `extension` to find the default file extension for a given MIME type. Unlike the general-purpose `node-mime` library, this package explicitly returns `false` for unknown types instead of providing naive fallbacks, requiring developers to implement their own fallback logic. It operates purely functionally, eschewing `new Mime()` constructors or a `.define()` API for adding custom types; all type definitions are sourced from the comprehensive `mime-db` project. The current stable version is 2.5.0, and it receives updates as needed, often reflecting changes in `mime-db`. Its primary differentiator is its simplicity and explicit behavior regarding unknown types, making it predictable for React Native environments.