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Dart has a rich set of core libraries that provide essentials for many everydayprogramming tasks such as working on collections of objects(dart:collection), making calculations (dart:math), and encoding/decodingdata (dart:convert). Additional APIs are available incommunity contributed packages.
Multi-platform libraries
The following table lists the Dart core libraries that work on allDart platforms.
| Library | Notes |
|---|---|
dart:async Support for asynchronous programming, with classes such as Future and Stream. | |
dart:collection Classes and utilities that supplement the collection support in dart:core. | |
dart:convert Encoders and decoders for converting between different data representations, including JSON and UTF-8. | |
dart:core Built-in types, collections, and other core functionality for every Dart program. | |
dart:developer Interaction with developer tools such as the debugger and inspector. | JIT and dartdevc only |
dart:math Mathematical constants and functions, plus a random number generator. | |
dart:typed_data Lists that efficiently handle fixed sized data (for example, unsigned 8-byte integers) and SIMD numeric types. |
Native platform libraries
The following table lists the Dart core libraries that work on theDart native platform (AOT- and JIT-compiled code).
| Library | Notes |
|---|---|
dart:io File, socket, HTTP, and other I/O support for non-web applications. | |
dart:isolate Concurrent programming using isolates: independent workers similar to threads. | |
dart:mirrors Basic reflection with support for introspection and dynamic invocation. | ExperimentalJIT only (not Flutter) |
Web platform libraries
The following table lists the Dart core libraries that work on theDart web platform (code compiled to JavaScript).
| Library | Notes |
|---|---|
dart:html HTML elements and other resources for web-based applications. | |
dart:indexed_db Client-side key-value store with support for indexes. | |
dart:web_audio High-fidelity audio programming in the browser. | |
dart:web_gl 3D programming in the browser. | |
dart:jsDon’t use. Instead, use the js package, as described in JavaScript interoperability. | DEPRECATED |
dart:js_utilDon’t use. Instead, use the js package, as described in JavaScript interoperability. | DEPRECATED |
dart:web_sql API for storing data in the browser that can be queried with SQL. | DEPRECATED |
