Dart SDK

Welcome to the Dart API reference documentation, covering the Dart core libraries. These include:

• dart:core: Core functionality such as strings, numbers, collections, errors, dates, and URIs.
• dart:html: DOM manipulation for web apps (available only to web apps).
• dart:io: I/O for non-web apps.

Except for dart:core, you must import a library before you can use it. Here's an example of importing dart:async and dart:math:

import 'dart:async';
import 'dart:math';

You can find more libraries using the pub.dev site.

The main site for learning and using Dart is dart.dev. Check out these pages:

• Platforms
• Language tour
• Library tour
• Sample code

This API reference is automatically generated from source code in the Dart SDK project. If you'd like to give feedback or edit this documentation, see Contributing.

Libraries

Core

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

Interact with developer tools such as the debugger and inspector.

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.

VM

dart:cli

Utilities for building CLI apps.

dart:ffi

Foreign Function Interface for interoperability with the C programming language.

dart:io

File, socket, HTTP, and other I/O support for non-web applications.

dart:isolate

Concurrent programming using isolates: independent workers that are similar to threads but don't share memory, communicating only via messages.

dart:mirrors

Basic reflection in Dart, with support for introspection and dynamic invocation.

Web

dart:html

HTML elements and other resources for web-based applications that need to interact with the browser and the DOM (Document Object Model).

dart:indexed_db

A client-side key-value store with support for indexes.

dart:js

Low-level support for interoperating with JavaScript.

dart:js_util

Utility methods to manipulate package:js annotated JavaScript interop objects in cases where the name to call is not known at runtime.

dart:svg

Scalable Vector Graphics: Two-dimensional vector graphics with support for events and animation.

dart:web_audio

High-fidelity audio programming in the browser.

dart:web_gl

3D programming in the browser.