Dart language specification

Use this page to find the formal Dart language specification.For a gentler introduction to Dart, see thelanguage tour.

Dart 2

A formal Dart 2 specification is available in PDF format:

• Dart Programming Language Specification (Version 2.2)

Note: Dart 2 has changed the Dart language in many ways, some of which are notbackward-compatible. For details, see the Dart 2 page.

In-progress specification

The in-progress formal Dart language specification is written as aLaTeX file,and is available as a draft specification in PDF format.

New language features are typically described using informal language feature specifications in the dart-lang/language repo:

• Accepted informal proposals
• Drafts of potential features

Dart 1.x

The formal Dart 1.x language specification is available fromthe Ecma International website:

• Dart Programming Language Specification, 4th Edition