Dart Language Specification
Use this page to find the formal Dart language specification. For a gentler introduction to Dart, see the language tour.
A formal Dart 2 specification is available in PDF format:
Note: Dart 2 has changed the Dart language in many ways, some of which are not backward-compatible. For details, see the Dart 2 page.
New language features are typically described using informal language feature specifications. These are located inside the dart-lang/language repo:
The formal Dart 1.x language specification is available from the Ecma International website: